/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_noop.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 14:31:40,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 14:31:40,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 14:31:40,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 14:31:40,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 14:31:40,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 14:31:40,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 14:31:40,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 14:31:40,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 14:31:40,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 14:31:40,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 14:31:40,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 14:31:40,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 14:31:40,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 14:31:40,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 14:31:40,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 14:31:40,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 14:31:40,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 14:31:40,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 14:31:40,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 14:31:40,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 14:31:40,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 14:31:40,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 14:31:40,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 14:31:40,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 14:31:40,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 14:31:40,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 14:31:40,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 14:31:40,973 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-10 14:31:40,999 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 14:31:40,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 14:31:41,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 14:31:41,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 14:31:41,000 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 14:31:41,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 14:31:41,000 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 14:31:41,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 14:31:41,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 14:31:41,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 14:31:41,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 14:31:41,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 14:31:41,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 14:31:41,001 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 14:31:41,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 14:31:41,001 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 14:31:41,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 14:31:41,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 14:31:41,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 14:31:41,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 14:31:41,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 14:31:41,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 14:31:41,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 14:31:41,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 14:31:41,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 14:31:41,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 14:31:41,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 14:31:41,002 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 14:31:41,002 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 14:31:41,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 14:31:41,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 14:31:41,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 14:31:41,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 14:31:41,246 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 14:31:41,247 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 14:31:41,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_noop.bpl [2021-06-10 14:31:41,248 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_noop.bpl' [2021-06-10 14:31:41,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 14:31:41,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 14:31:41,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 14:31:41,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 14:31:41,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 14:31:41,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:31:41" (1/1) ... [2021-06-10 14:31:41,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:31:41" (1/1) ... [2021-06-10 14:31:41,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 14:31:41,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 14:31:41,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 14:31:41,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 14:31:41,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:31:41" (1/1) ... [2021-06-10 14:31:41,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:31:41" (1/1) ... [2021-06-10 14:31:41,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:31:41" (1/1) ... [2021-06-10 14:31:41,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:31:41" (1/1) ... [2021-06-10 14:31:41,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:31:41" (1/1) ... [2021-06-10 14:31:41,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:31:41" (1/1) ... [2021-06-10 14:31:41,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:31:41" (1/1) ... [2021-06-10 14:31:41,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 14:31:41,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 14:31:41,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 14:31:41,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 14:31:41,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:31:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 14:31:41,363 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 14:31:41,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 14:31:41,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 14:31:41,364 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-06-10 14:31:41,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-06-10 14:31:41,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-06-10 14:31:41,365 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 14:31:41,441 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 14:31:41,441 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-10 14:31:41,442 INFO L202 PluginConnector]: Adding new model fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:31:41 BoogieIcfgContainer [2021-06-10 14:31:41,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 14:31:41,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 14:31:41,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 14:31:41,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 14:31:41,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:31:41" (1/2) ... [2021-06-10 14:31:41,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc90369 and model type fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 02:31:41, skipping insertion in model container [2021-06-10 14:31:41,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:31:41" (2/2) ... [2021-06-10 14:31:41,446 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_noop.bpl [2021-06-10 14:31:41,450 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 14:31:41,452 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 14:31:41,452 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 14:31:41,467 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:41,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:41,491 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:41,491 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:41,491 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:41,491 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:41,491 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:41,491 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:41,491 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:41,492 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:41,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 11 places, 8 transitions, 21 flow [2021-06-10 14:31:41,508 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-06-10 14:31:41,508 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 19 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 14:31:41,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 11 places, 8 transitions, 21 flow [2021-06-10 14:31:41,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 9 places, 6 transitions, 17 flow [2021-06-10 14:31:41,513 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:41,513 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,513 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,513 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:41,513 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1315, now seen corresponding path program 1 times [2021-06-10 14:31:41,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059703556] [2021-06-10 14:31:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:41,603 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:41,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:41,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059703556] [2021-06-10 14:31:41,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:41,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:41,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272893252] [2021-06-10 14:31:41,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:41,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:41,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:41,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:41,635 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 8 [2021-06-10 14:31:41,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 9 places, 6 transitions, 17 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:41,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 8 [2021-06-10 14:31:41,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:41,644 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-06-10 14:31:41,645 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12 conditions, 5 events. 0/5 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 2/7 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 14:31:41,647 INFO L132 encePairwiseOnDemand]: 6/8 looper letters, 0 selfloop transitions, 1 changer transitions 0/5 dead transitions. [2021-06-10 14:31:41,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 5 transitions, 17 flow [2021-06-10 14:31:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 17 transitions. [2021-06-10 14:31:41,653 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2021-06-10 14:31:41,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 17 transitions. [2021-06-10 14:31:41,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 17 transitions. [2021-06-10 14:31:41,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:41,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 17 transitions. [2021-06-10 14:31:41,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,662 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,663 INFO L185 Difference]: Start difference. First operand has 9 places, 6 transitions, 17 flow. Second operand 3 states and 17 transitions. [2021-06-10 14:31:41,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 5 transitions, 17 flow [2021-06-10 14:31:41,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 5 transitions, 17 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:41,666 INFO L241 Difference]: Finished difference. Result has 10 places, 5 transitions, 17 flow [2021-06-10 14:31:41,667 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=8, PETRI_DIFFERENCE_MINUEND_FLOW=15, PETRI_DIFFERENCE_MINUEND_PLACES=8, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=5} [2021-06-10 14:31:41,668 INFO L343 CegarLoopForPetriNet]: 9 programPoint places, 1 predicate places. [2021-06-10 14:31:41,668 INFO L480 AbstractCegarLoop]: Abstraction has has 10 places, 5 transitions, 17 flow [2021-06-10 14:31:41,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,668 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,669 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-06-10 14:31:41,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 14:31:41,669 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,670 INFO L82 PathProgramCache]: Analyzing trace with hash 41033, now seen corresponding path program 1 times [2021-06-10 14:31:41,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918679803] [2021-06-10 14:31:41,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,677 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,680 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,689 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:41,689 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:41,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 14:31:41,690 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:41,690 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-10 14:31:41,701 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:41,701 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:41,704 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:41,704 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:41,704 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:41,704 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:41,704 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:41,705 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:41,705 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:41,705 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:41,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 11 transitions, 34 flow [2021-06-10 14:31:41,710 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-06-10 14:31:41,710 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 39 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-10 14:31:41,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 11 transitions, 34 flow [2021-06-10 14:31:41,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 14 places, 9 transitions, 30 flow [2021-06-10 14:31:41,712 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:41,713 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,713 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,713 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:41,713 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1667, now seen corresponding path program 1 times [2021-06-10 14:31:41,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460680461] [2021-06-10 14:31:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:41,724 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:41,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:41,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460680461] [2021-06-10 14:31:41,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:41,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:41,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130111906] [2021-06-10 14:31:41,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:41,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:41,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:41,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:41,741 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 11 [2021-06-10 14:31:41,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 9 transitions, 30 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:41,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 11 [2021-06-10 14:31:41,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:41,743 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-06-10 14:31:41,743 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 8 events. 0/8 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 6 event pairs, 0 based on Foata normal form. 3/11 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-10 14:31:41,744 INFO L132 encePairwiseOnDemand]: 9/11 looper letters, 0 selfloop transitions, 1 changer transitions 0/8 dead transitions. [2021-06-10 14:31:41,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 8 transitions, 30 flow [2021-06-10 14:31:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2021-06-10 14:31:41,744 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2021-06-10 14:31:41,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 26 transitions. [2021-06-10 14:31:41,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 26 transitions. [2021-06-10 14:31:41,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:41,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 26 transitions. [2021-06-10 14:31:41,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,745 INFO L185 Difference]: Start difference. First operand has 14 places, 9 transitions, 30 flow. Second operand 3 states and 26 transitions. [2021-06-10 14:31:41,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 8 transitions, 30 flow [2021-06-10 14:31:41,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 8 transitions, 28 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:41,746 INFO L241 Difference]: Finished difference. Result has 15 places, 8 transitions, 28 flow [2021-06-10 14:31:41,746 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=11, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28, PETRI_PLACES=15, PETRI_TRANSITIONS=8} [2021-06-10 14:31:41,746 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 1 predicate places. [2021-06-10 14:31:41,747 INFO L480 AbstractCegarLoop]: Abstraction has has 15 places, 8 transitions, 28 flow [2021-06-10 14:31:41,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,747 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,747 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-06-10 14:31:41,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 14:31:41,747 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1612715, now seen corresponding path program 1 times [2021-06-10 14:31:41,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017937850] [2021-06-10 14:31:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,750 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,751 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,752 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:41,752 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:41,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 14:31:41,753 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:41,753 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-10 14:31:41,758 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:41,759 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:41,759 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:41,760 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:41,760 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:41,760 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:41,760 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:41,760 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:41,760 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:41,760 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:41,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 49 flow [2021-06-10 14:31:41,763 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-06-10 14:31:41,764 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 23 events. 0/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 66 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-10 14:31:41,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 49 flow [2021-06-10 14:31:41,764 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 12 transitions, 45 flow [2021-06-10 14:31:41,765 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:41,765 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,765 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,765 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:41,765 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2115, now seen corresponding path program 1 times [2021-06-10 14:31:41,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419140390] [2021-06-10 14:31:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:41,769 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:41,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:41,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419140390] [2021-06-10 14:31:41,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:41,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:41,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772170006] [2021-06-10 14:31:41,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:41,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:41,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:41,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:41,774 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 14 [2021-06-10 14:31:41,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 12 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:41,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 14 [2021-06-10 14:31:41,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:41,777 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-06-10 14:31:41,777 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 4/15 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-10 14:31:41,777 INFO L132 encePairwiseOnDemand]: 12/14 looper letters, 0 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2021-06-10 14:31:41,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 11 transitions, 45 flow [2021-06-10 14:31:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2021-06-10 14:31:41,778 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-06-10 14:31:41,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 35 transitions. [2021-06-10 14:31:41,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 35 transitions. [2021-06-10 14:31:41,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:41,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 35 transitions. [2021-06-10 14:31:41,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,779 INFO L185 Difference]: Start difference. First operand has 19 places, 12 transitions, 45 flow. Second operand 3 states and 35 transitions. [2021-06-10 14:31:41,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 11 transitions, 45 flow [2021-06-10 14:31:41,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 11 transitions, 39 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:41,780 INFO L241 Difference]: Finished difference. Result has 20 places, 11 transitions, 39 flow [2021-06-10 14:31:41,780 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=20, PETRI_TRANSITIONS=11} [2021-06-10 14:31:41,780 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2021-06-10 14:31:41,780 INFO L480 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 39 flow [2021-06-10 14:31:41,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,780 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,781 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-06-10 14:31:41,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-10 14:31:41,781 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,781 INFO L82 PathProgramCache]: Analyzing trace with hash 63416129, now seen corresponding path program 1 times [2021-06-10 14:31:41,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506654578] [2021-06-10 14:31:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,784 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,785 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,786 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:41,786 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:41,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-10 14:31:41,787 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:41,787 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-10 14:31:41,793 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:41,793 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:41,794 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:41,794 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:41,794 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:41,794 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:41,794 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:41,794 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:41,794 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:41,794 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:41,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 26 places, 17 transitions, 66 flow [2021-06-10 14:31:41,799 INFO L129 PetriNetUnfolder]: 0/29 cut-off events. [2021-06-10 14:31:41,799 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 90 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-06-10 14:31:41,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 17 transitions, 66 flow [2021-06-10 14:31:41,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 15 transitions, 62 flow [2021-06-10 14:31:41,800 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:41,800 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,800 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,800 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:41,801 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2659, now seen corresponding path program 1 times [2021-06-10 14:31:41,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460361310] [2021-06-10 14:31:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:41,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:41,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:41,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460361310] [2021-06-10 14:31:41,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:41,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:41,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838961869] [2021-06-10 14:31:41,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:41,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:41,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:41,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:41,810 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 17 [2021-06-10 14:31:41,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 15 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:41,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 17 [2021-06-10 14:31:41,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:41,814 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-06-10 14:31:41,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 14 events. 0/14 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 18 event pairs, 0 based on Foata normal form. 5/19 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-06-10 14:31:41,814 INFO L132 encePairwiseOnDemand]: 15/17 looper letters, 0 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2021-06-10 14:31:41,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 14 transitions, 62 flow [2021-06-10 14:31:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2021-06-10 14:31:41,815 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8627450980392157 [2021-06-10 14:31:41,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 44 transitions. [2021-06-10 14:31:41,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 44 transitions. [2021-06-10 14:31:41,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:41,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 44 transitions. [2021-06-10 14:31:41,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,817 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,817 INFO L185 Difference]: Start difference. First operand has 24 places, 15 transitions, 62 flow. Second operand 3 states and 44 transitions. [2021-06-10 14:31:41,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 14 transitions, 62 flow [2021-06-10 14:31:41,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 14 transitions, 50 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:41,818 INFO L241 Difference]: Finished difference. Result has 25 places, 14 transitions, 50 flow [2021-06-10 14:31:41,818 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=14} [2021-06-10 14:31:41,818 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-06-10 14:31:41,818 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 14 transitions, 50 flow [2021-06-10 14:31:41,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,819 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,819 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-10 14:31:41,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-10 14:31:41,819 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1824239762, now seen corresponding path program 1 times [2021-06-10 14:31:41,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469338202] [2021-06-10 14:31:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,822 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,824 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,826 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:41,826 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:41,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-10 14:31:41,826 WARN L342 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:41,826 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-10 14:31:41,834 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:41,834 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:41,835 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:41,835 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:41,835 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:41,835 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:41,836 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:41,836 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:41,836 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:41,836 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:41,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 20 transitions, 85 flow [2021-06-10 14:31:41,842 INFO L129 PetriNetUnfolder]: 0/35 cut-off events. [2021-06-10 14:31:41,842 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,842 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 35 events. 0/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 111 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-06-10 14:31:41,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 20 transitions, 85 flow [2021-06-10 14:31:41,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 18 transitions, 81 flow [2021-06-10 14:31:41,843 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:41,843 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,843 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,843 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:41,843 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,844 INFO L82 PathProgramCache]: Analyzing trace with hash 3299, now seen corresponding path program 1 times [2021-06-10 14:31:41,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210147303] [2021-06-10 14:31:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:41,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:41,849 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:41,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210147303] [2021-06-10 14:31:41,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:41,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:41,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441938254] [2021-06-10 14:31:41,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:41,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:41,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:41,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:41,853 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 20 [2021-06-10 14:31:41,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:41,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 20 [2021-06-10 14:31:41,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:41,858 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-06-10 14:31:41,858 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 6/23 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-06-10 14:31:41,858 INFO L132 encePairwiseOnDemand]: 18/20 looper letters, 0 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2021-06-10 14:31:41,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 17 transitions, 81 flow [2021-06-10 14:31:41,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2021-06-10 14:31:41,860 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8833333333333333 [2021-06-10 14:31:41,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 53 transitions. [2021-06-10 14:31:41,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 53 transitions. [2021-06-10 14:31:41,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:41,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 53 transitions. [2021-06-10 14:31:41,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,861 INFO L185 Difference]: Start difference. First operand has 29 places, 18 transitions, 81 flow. Second operand 3 states and 53 transitions. [2021-06-10 14:31:41,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 17 transitions, 81 flow [2021-06-10 14:31:41,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 17 transitions, 61 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:41,863 INFO L241 Difference]: Finished difference. Result has 30 places, 17 transitions, 61 flow [2021-06-10 14:31:41,864 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=30, PETRI_TRANSITIONS=17} [2021-06-10 14:31:41,864 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2021-06-10 14:31:41,864 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 17 transitions, 61 flow [2021-06-10 14:31:41,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,864 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,864 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:41,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-10 14:31:41,864 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash 504182917, now seen corresponding path program 1 times [2021-06-10 14:31:41,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966292900] [2021-06-10 14:31:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,869 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,871 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,872 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:41,872 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:41,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-10 14:31:41,872 WARN L342 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:41,873 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-06-10 14:31:41,882 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:41,883 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:41,883 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:41,883 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:41,883 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:41,884 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:41,884 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:41,884 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:41,884 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:41,884 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:41,885 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 23 transitions, 106 flow [2021-06-10 14:31:41,890 INFO L129 PetriNetUnfolder]: 0/41 cut-off events. [2021-06-10 14:31:41,891 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-06-10 14:31:41,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 23 transitions, 106 flow [2021-06-10 14:31:41,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 21 transitions, 102 flow [2021-06-10 14:31:41,892 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:41,892 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,892 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,892 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:41,892 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,892 INFO L82 PathProgramCache]: Analyzing trace with hash 4035, now seen corresponding path program 1 times [2021-06-10 14:31:41,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149653343] [2021-06-10 14:31:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:41,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:41,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:41,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149653343] [2021-06-10 14:31:41,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:41,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:41,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825995687] [2021-06-10 14:31:41,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:41,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:41,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:41,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:41,902 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 23 [2021-06-10 14:31:41,902 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 21 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:41,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 23 [2021-06-10 14:31:41,902 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:41,907 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-06-10 14:31:41,907 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 20 events. 0/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 7/27 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-06-10 14:31:41,907 INFO L132 encePairwiseOnDemand]: 21/23 looper letters, 0 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2021-06-10 14:31:41,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 20 transitions, 102 flow [2021-06-10 14:31:41,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2021-06-10 14:31:41,908 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8985507246376812 [2021-06-10 14:31:41,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2021-06-10 14:31:41,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2021-06-10 14:31:41,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:41,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2021-06-10 14:31:41,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,910 INFO L185 Difference]: Start difference. First operand has 34 places, 21 transitions, 102 flow. Second operand 3 states and 62 transitions. [2021-06-10 14:31:41,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 20 transitions, 102 flow [2021-06-10 14:31:41,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 20 transitions, 72 flow, removed 15 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:41,912 INFO L241 Difference]: Finished difference. Result has 35 places, 20 transitions, 72 flow [2021-06-10 14:31:41,912 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=20} [2021-06-10 14:31:41,913 INFO L343 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2021-06-10 14:31:41,913 INFO L480 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 72 flow [2021-06-10 14:31:41,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,913 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,913 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:41,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-10 14:31:41,913 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1332075505, now seen corresponding path program 1 times [2021-06-10 14:31:41,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295846169] [2021-06-10 14:31:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,917 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,920 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,921 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:41,921 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:41,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-10 14:31:41,921 WARN L342 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:41,922 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-06-10 14:31:41,932 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:41,932 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:41,933 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:41,933 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:41,933 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:41,933 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:41,933 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:41,933 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:41,933 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:41,934 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:41,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 41 places, 26 transitions, 129 flow [2021-06-10 14:31:41,940 INFO L129 PetriNetUnfolder]: 0/47 cut-off events. [2021-06-10 14:31:41,940 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 166 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-06-10 14:31:41,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 26 transitions, 129 flow [2021-06-10 14:31:41,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 24 transitions, 125 flow [2021-06-10 14:31:41,942 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:41,942 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,942 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,942 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:41,942 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,942 INFO L82 PathProgramCache]: Analyzing trace with hash 4867, now seen corresponding path program 1 times [2021-06-10 14:31:41,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243447810] [2021-06-10 14:31:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:41,947 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:41,947 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:41,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243447810] [2021-06-10 14:31:41,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:41,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:41,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598278624] [2021-06-10 14:31:41,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:41,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:41,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:41,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:41,955 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 26 [2021-06-10 14:31:41,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 24 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:41,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 26 [2021-06-10 14:31:41,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:41,960 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-06-10 14:31:41,960 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:41,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 23 events. 0/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 8/31 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-06-10 14:31:41,960 INFO L132 encePairwiseOnDemand]: 24/26 looper letters, 0 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2021-06-10 14:31:41,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 23 transitions, 125 flow [2021-06-10 14:31:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:41,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2021-06-10 14:31:41,961 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9102564102564102 [2021-06-10 14:31:41,961 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2021-06-10 14:31:41,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2021-06-10 14:31:41,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:41,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2021-06-10 14:31:41,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,963 INFO L185 Difference]: Start difference. First operand has 39 places, 24 transitions, 125 flow. Second operand 3 states and 71 transitions. [2021-06-10 14:31:41,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 23 transitions, 125 flow [2021-06-10 14:31:41,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 23 transitions, 83 flow, removed 21 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:41,968 INFO L241 Difference]: Finished difference. Result has 40 places, 23 transitions, 83 flow [2021-06-10 14:31:41,969 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=40, PETRI_TRANSITIONS=23} [2021-06-10 14:31:41,969 INFO L343 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2021-06-10 14:31:41,969 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 23 transitions, 83 flow [2021-06-10 14:31:41,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:41,969 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:41,969 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:41,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-10 14:31:41,969 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:41,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:41,971 INFO L82 PathProgramCache]: Analyzing trace with hash 58177429, now seen corresponding path program 1 times [2021-06-10 14:31:41,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:41,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797391305] [2021-06-10 14:31:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,985 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:41,987 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:41,988 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:41,988 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:41,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-10 14:31:41,989 WARN L342 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:41,989 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2021-06-10 14:31:42,017 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,017 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,018 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,018 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,018 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,018 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,018 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,019 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,019 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,019 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 46 places, 29 transitions, 154 flow [2021-06-10 14:31:42,025 INFO L129 PetriNetUnfolder]: 0/53 cut-off events. [2021-06-10 14:31:42,025 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 53 events. 0/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 191 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-06-10 14:31:42,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 29 transitions, 154 flow [2021-06-10 14:31:42,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 27 transitions, 150 flow [2021-06-10 14:31:42,027 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:42,027 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,027 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,027 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,027 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,027 INFO L82 PathProgramCache]: Analyzing trace with hash 5795, now seen corresponding path program 1 times [2021-06-10 14:31:42,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887852753] [2021-06-10 14:31:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,035 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,035 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887852753] [2021-06-10 14:31:42,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679065214] [2021-06-10 14:31:42,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,040 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 29 [2021-06-10 14:31:42,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 29 [2021-06-10 14:31:42,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,053 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2021-06-10 14:31:42,053 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 26 events. 0/26 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 0 based on Foata normal form. 9/35 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-06-10 14:31:42,054 INFO L132 encePairwiseOnDemand]: 27/29 looper letters, 0 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2021-06-10 14:31:42,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 26 transitions, 150 flow [2021-06-10 14:31:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2021-06-10 14:31:42,062 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9195402298850575 [2021-06-10 14:31:42,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 80 transitions. [2021-06-10 14:31:42,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 80 transitions. [2021-06-10 14:31:42,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 80 transitions. [2021-06-10 14:31:42,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,064 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,064 INFO L185 Difference]: Start difference. First operand has 44 places, 27 transitions, 150 flow. Second operand 3 states and 80 transitions. [2021-06-10 14:31:42,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 26 transitions, 150 flow [2021-06-10 14:31:42,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 26 transitions, 94 flow, removed 28 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,066 INFO L241 Difference]: Finished difference. Result has 45 places, 26 transitions, 94 flow [2021-06-10 14:31:42,066 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=26} [2021-06-10 14:31:42,066 INFO L343 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2021-06-10 14:31:42,066 INFO L480 AbstractCegarLoop]: Abstraction has has 45 places, 26 transitions, 94 flow [2021-06-10 14:31:42,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,066 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,067 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-10 14:31:42,067 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1055505844, now seen corresponding path program 1 times [2021-06-10 14:31:42,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227142780] [2021-06-10 14:31:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,070 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,073 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,074 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,074 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-10 14:31:42,074 WARN L342 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,074 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2021-06-10 14:31:42,085 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,086 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,086 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,086 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,087 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,087 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,087 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,087 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,087 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,087 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,087 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 51 places, 32 transitions, 181 flow [2021-06-10 14:31:42,093 INFO L129 PetriNetUnfolder]: 0/59 cut-off events. [2021-06-10 14:31:42,093 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 59 events. 0/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 216 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2021-06-10 14:31:42,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 32 transitions, 181 flow [2021-06-10 14:31:42,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 30 transitions, 177 flow [2021-06-10 14:31:42,094 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:42,095 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,095 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,095 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,095 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash 6819, now seen corresponding path program 1 times [2021-06-10 14:31:42,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098245280] [2021-06-10 14:31:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,099 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,099 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098245280] [2021-06-10 14:31:42,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977654538] [2021-06-10 14:31:42,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,103 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 32 [2021-06-10 14:31:42,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 30 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 32 [2021-06-10 14:31:42,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,107 INFO L129 PetriNetUnfolder]: 0/29 cut-off events. [2021-06-10 14:31:42,107 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 10/39 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2021-06-10 14:31:42,108 INFO L132 encePairwiseOnDemand]: 30/32 looper letters, 0 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2021-06-10 14:31:42,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 29 transitions, 177 flow [2021-06-10 14:31:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2021-06-10 14:31:42,108 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9270833333333334 [2021-06-10 14:31:42,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2021-06-10 14:31:42,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2021-06-10 14:31:42,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2021-06-10 14:31:42,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,110 INFO L185 Difference]: Start difference. First operand has 49 places, 30 transitions, 177 flow. Second operand 3 states and 89 transitions. [2021-06-10 14:31:42,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 29 transitions, 177 flow [2021-06-10 14:31:42,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 29 transitions, 105 flow, removed 36 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,112 INFO L241 Difference]: Finished difference. Result has 50 places, 29 transitions, 105 flow [2021-06-10 14:31:42,112 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=50, PETRI_TRANSITIONS=29} [2021-06-10 14:31:42,112 INFO L343 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2021-06-10 14:31:42,112 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 29 transitions, 105 flow [2021-06-10 14:31:42,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,113 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,113 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-10 14:31:42,113 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1814808561, now seen corresponding path program 1 times [2021-06-10 14:31:42,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292034156] [2021-06-10 14:31:42,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,117 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,119 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,120 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,121 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-10 14:31:42,121 WARN L342 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,121 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2021-06-10 14:31:42,132 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,133 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,133 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,133 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,133 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,134 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,134 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,134 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,134 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,134 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 56 places, 35 transitions, 210 flow [2021-06-10 14:31:42,140 INFO L129 PetriNetUnfolder]: 0/65 cut-off events. [2021-06-10 14:31:42,140 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 65 events. 0/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 234 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-06-10 14:31:42,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 35 transitions, 210 flow [2021-06-10 14:31:42,141 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 33 transitions, 206 flow [2021-06-10 14:31:42,141 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:42,141 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,141 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,141 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,141 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,142 INFO L82 PathProgramCache]: Analyzing trace with hash 7939, now seen corresponding path program 1 times [2021-06-10 14:31:42,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018027676] [2021-06-10 14:31:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,145 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,146 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018027676] [2021-06-10 14:31:42,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538839198] [2021-06-10 14:31:42,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,149 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 35 [2021-06-10 14:31:42,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 35 [2021-06-10 14:31:42,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,154 INFO L129 PetriNetUnfolder]: 0/32 cut-off events. [2021-06-10 14:31:42,154 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 32 events. 0/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 11/43 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-06-10 14:31:42,154 INFO L132 encePairwiseOnDemand]: 33/35 looper letters, 0 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2021-06-10 14:31:42,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 32 transitions, 206 flow [2021-06-10 14:31:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2021-06-10 14:31:42,155 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9333333333333333 [2021-06-10 14:31:42,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2021-06-10 14:31:42,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2021-06-10 14:31:42,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2021-06-10 14:31:42,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,156 INFO L185 Difference]: Start difference. First operand has 54 places, 33 transitions, 206 flow. Second operand 3 states and 98 transitions. [2021-06-10 14:31:42,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 32 transitions, 206 flow [2021-06-10 14:31:42,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 32 transitions, 116 flow, removed 45 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,159 INFO L241 Difference]: Finished difference. Result has 55 places, 32 transitions, 116 flow [2021-06-10 14:31:42,159 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=55, PETRI_TRANSITIONS=32} [2021-06-10 14:31:42,159 INFO L343 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2021-06-10 14:31:42,159 INFO L480 AbstractCegarLoop]: Abstraction has has 55 places, 32 transitions, 116 flow [2021-06-10 14:31:42,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,159 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,159 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-10 14:31:42,159 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1379283255, now seen corresponding path program 1 times [2021-06-10 14:31:42,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039047963] [2021-06-10 14:31:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,163 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,165 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,167 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,167 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-10 14:31:42,167 WARN L342 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,167 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2021-06-10 14:31:42,180 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,181 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,181 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,181 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,181 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,181 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,181 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,181 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,181 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 61 places, 38 transitions, 241 flow [2021-06-10 14:31:42,187 INFO L129 PetriNetUnfolder]: 0/71 cut-off events. [2021-06-10 14:31:42,187 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 71 events. 0/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 257 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-06-10 14:31:42,187 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 38 transitions, 241 flow [2021-06-10 14:31:42,187 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 36 transitions, 237 flow [2021-06-10 14:31:42,188 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:42,188 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,188 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,188 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,188 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,188 INFO L82 PathProgramCache]: Analyzing trace with hash 9155, now seen corresponding path program 1 times [2021-06-10 14:31:42,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290142316] [2021-06-10 14:31:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,192 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,192 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290142316] [2021-06-10 14:31:42,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666673788] [2021-06-10 14:31:42,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,196 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 38 [2021-06-10 14:31:42,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 36 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 38 [2021-06-10 14:31:42,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,200 INFO L129 PetriNetUnfolder]: 0/35 cut-off events. [2021-06-10 14:31:42,200 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 35 events. 0/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 12/47 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-06-10 14:31:42,200 INFO L132 encePairwiseOnDemand]: 36/38 looper letters, 0 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2021-06-10 14:31:42,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 35 transitions, 237 flow [2021-06-10 14:31:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-06-10 14:31:42,201 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9385964912280702 [2021-06-10 14:31:42,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-06-10 14:31:42,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-06-10 14:31:42,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-06-10 14:31:42,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,202 INFO L185 Difference]: Start difference. First operand has 59 places, 36 transitions, 237 flow. Second operand 3 states and 107 transitions. [2021-06-10 14:31:42,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 35 transitions, 237 flow [2021-06-10 14:31:42,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 35 transitions, 127 flow, removed 55 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,204 INFO L241 Difference]: Finished difference. Result has 60 places, 35 transitions, 127 flow [2021-06-10 14:31:42,204 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=60, PETRI_TRANSITIONS=35} [2021-06-10 14:31:42,204 INFO L343 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2021-06-10 14:31:42,205 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 35 transitions, 127 flow [2021-06-10 14:31:42,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,205 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,205 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-10 14:31:42,205 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,205 INFO L82 PathProgramCache]: Analyzing trace with hash -279163623, now seen corresponding path program 1 times [2021-06-10 14:31:42,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962690039] [2021-06-10 14:31:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,213 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,215 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,217 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,217 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-10 14:31:42,217 WARN L342 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,217 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2021-06-10 14:31:42,233 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,233 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,234 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,234 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,234 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,234 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,234 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,234 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,234 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,234 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 41 transitions, 274 flow [2021-06-10 14:31:42,246 INFO L129 PetriNetUnfolder]: 0/77 cut-off events. [2021-06-10 14:31:42,246 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 77 events. 0/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 280 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-06-10 14:31:42,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 41 transitions, 274 flow [2021-06-10 14:31:42,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 39 transitions, 270 flow [2021-06-10 14:31:42,248 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:42,248 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,248 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,248 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,249 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash 10467, now seen corresponding path program 1 times [2021-06-10 14:31:42,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952789800] [2021-06-10 14:31:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952789800] [2021-06-10 14:31:42,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671275301] [2021-06-10 14:31:42,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,267 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 41 [2021-06-10 14:31:42,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 41 [2021-06-10 14:31:42,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,276 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-06-10 14:31:42,276 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 13/51 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-06-10 14:31:42,277 INFO L132 encePairwiseOnDemand]: 39/41 looper letters, 0 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2021-06-10 14:31:42,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 38 transitions, 270 flow [2021-06-10 14:31:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2021-06-10 14:31:42,277 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.943089430894309 [2021-06-10 14:31:42,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2021-06-10 14:31:42,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2021-06-10 14:31:42,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2021-06-10 14:31:42,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,279 INFO L185 Difference]: Start difference. First operand has 64 places, 39 transitions, 270 flow. Second operand 3 states and 116 transitions. [2021-06-10 14:31:42,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 38 transitions, 270 flow [2021-06-10 14:31:42,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 38 transitions, 138 flow, removed 66 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,284 INFO L241 Difference]: Finished difference. Result has 65 places, 38 transitions, 138 flow [2021-06-10 14:31:42,284 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=65, PETRI_TRANSITIONS=38} [2021-06-10 14:31:42,284 INFO L343 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2021-06-10 14:31:42,284 INFO L480 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 138 flow [2021-06-10 14:31:42,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,284 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,284 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-10 14:31:42,285 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,285 INFO L82 PathProgramCache]: Analyzing trace with hash 387658490, now seen corresponding path program 1 times [2021-06-10 14:31:42,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664734352] [2021-06-10 14:31:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,295 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,297 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,299 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,299 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-10 14:31:42,299 WARN L342 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,299 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2021-06-10 14:31:42,321 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,321 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,322 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,322 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,322 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,322 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,322 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,322 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,322 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,322 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 71 places, 44 transitions, 309 flow [2021-06-10 14:31:42,333 INFO L129 PetriNetUnfolder]: 0/83 cut-off events. [2021-06-10 14:31:42,334 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 83 events. 0/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 309 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 0. Up to 14 conditions per place. [2021-06-10 14:31:42,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 44 transitions, 309 flow [2021-06-10 14:31:42,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 42 transitions, 305 flow [2021-06-10 14:31:42,335 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:42,335 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,335 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,335 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,336 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,336 INFO L82 PathProgramCache]: Analyzing trace with hash 11875, now seen corresponding path program 1 times [2021-06-10 14:31:42,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394847584] [2021-06-10 14:31:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394847584] [2021-06-10 14:31:42,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370683680] [2021-06-10 14:31:42,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,352 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 44 [2021-06-10 14:31:42,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 42 transitions, 305 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 44 [2021-06-10 14:31:42,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,356 INFO L129 PetriNetUnfolder]: 0/41 cut-off events. [2021-06-10 14:31:42,356 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 14/55 useless extension candidates. Maximal degree in co-relation 0. Up to 14 conditions per place. [2021-06-10 14:31:42,357 INFO L132 encePairwiseOnDemand]: 42/44 looper letters, 0 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2021-06-10 14:31:42,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 41 transitions, 305 flow [2021-06-10 14:31:42,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2021-06-10 14:31:42,357 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.946969696969697 [2021-06-10 14:31:42,357 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2021-06-10 14:31:42,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2021-06-10 14:31:42,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2021-06-10 14:31:42,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,358 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,358 INFO L185 Difference]: Start difference. First operand has 69 places, 42 transitions, 305 flow. Second operand 3 states and 125 transitions. [2021-06-10 14:31:42,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 41 transitions, 305 flow [2021-06-10 14:31:42,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 41 transitions, 149 flow, removed 78 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,360 INFO L241 Difference]: Finished difference. Result has 70 places, 41 transitions, 149 flow [2021-06-10 14:31:42,361 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=70, PETRI_TRANSITIONS=41} [2021-06-10 14:31:42,361 INFO L343 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2021-06-10 14:31:42,361 INFO L480 AbstractCegarLoop]: Abstraction has has 70 places, 41 transitions, 149 flow [2021-06-10 14:31:42,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,361 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,361 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-10 14:31:42,361 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,361 INFO L82 PathProgramCache]: Analyzing trace with hash -656774515, now seen corresponding path program 1 times [2021-06-10 14:31:42,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008671678] [2021-06-10 14:31:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,365 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,367 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,368 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,368 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-10 14:31:42,369 WARN L342 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,369 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2021-06-10 14:31:42,383 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,384 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,384 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,384 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,384 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,384 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,384 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,385 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,385 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,385 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 76 places, 47 transitions, 346 flow [2021-06-10 14:31:42,391 INFO L129 PetriNetUnfolder]: 0/89 cut-off events. [2021-06-10 14:31:42,391 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 89 events. 0/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 343 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2021-06-10 14:31:42,391 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 47 transitions, 346 flow [2021-06-10 14:31:42,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 45 transitions, 342 flow [2021-06-10 14:31:42,392 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:42,392 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,392 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,392 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,392 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash 13379, now seen corresponding path program 1 times [2021-06-10 14:31:42,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974465290] [2021-06-10 14:31:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974465290] [2021-06-10 14:31:42,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005819278] [2021-06-10 14:31:42,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,399 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 47 [2021-06-10 14:31:42,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 45 transitions, 342 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 47 [2021-06-10 14:31:42,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,405 INFO L129 PetriNetUnfolder]: 0/44 cut-off events. [2021-06-10 14:31:42,405 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 44 events. 0/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 15/59 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2021-06-10 14:31:42,405 INFO L132 encePairwiseOnDemand]: 45/47 looper letters, 0 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2021-06-10 14:31:42,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 44 transitions, 342 flow [2021-06-10 14:31:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2021-06-10 14:31:42,406 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.950354609929078 [2021-06-10 14:31:42,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 134 transitions. [2021-06-10 14:31:42,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 134 transitions. [2021-06-10 14:31:42,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 134 transitions. [2021-06-10 14:31:42,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,407 INFO L185 Difference]: Start difference. First operand has 74 places, 45 transitions, 342 flow. Second operand 3 states and 134 transitions. [2021-06-10 14:31:42,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 44 transitions, 342 flow [2021-06-10 14:31:42,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 44 transitions, 160 flow, removed 91 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,409 INFO L241 Difference]: Finished difference. Result has 75 places, 44 transitions, 160 flow [2021-06-10 14:31:42,409 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=75, PETRI_TRANSITIONS=44} [2021-06-10 14:31:42,409 INFO L343 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2021-06-10 14:31:42,409 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 160 flow [2021-06-10 14:31:42,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,409 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,409 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-10 14:31:42,410 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,410 INFO L82 PathProgramCache]: Analyzing trace with hash 910327677, now seen corresponding path program 1 times [2021-06-10 14:31:42,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567748331] [2021-06-10 14:31:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,413 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,415 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,417 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,417 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-10 14:31:42,417 WARN L342 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,417 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2021-06-10 14:31:42,432 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,433 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,433 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,433 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,433 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,433 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,433 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,433 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,433 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,433 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 81 places, 50 transitions, 385 flow [2021-06-10 14:31:42,440 INFO L129 PetriNetUnfolder]: 0/95 cut-off events. [2021-06-10 14:31:42,440 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 95 events. 0/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 298 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 0. Up to 16 conditions per place. [2021-06-10 14:31:42,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 50 transitions, 385 flow [2021-06-10 14:31:42,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 48 transitions, 381 flow [2021-06-10 14:31:42,441 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:42,441 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,441 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,441 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,441 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,442 INFO L82 PathProgramCache]: Analyzing trace with hash 14979, now seen corresponding path program 1 times [2021-06-10 14:31:42,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490096312] [2021-06-10 14:31:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,446 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490096312] [2021-06-10 14:31:42,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827927521] [2021-06-10 14:31:42,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,449 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 50 [2021-06-10 14:31:42,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 48 transitions, 381 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 50 [2021-06-10 14:31:42,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,454 INFO L129 PetriNetUnfolder]: 0/47 cut-off events. [2021-06-10 14:31:42,455 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,455 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 16/63 useless extension candidates. Maximal degree in co-relation 0. Up to 16 conditions per place. [2021-06-10 14:31:42,455 INFO L132 encePairwiseOnDemand]: 48/50 looper letters, 0 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2021-06-10 14:31:42,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 47 transitions, 381 flow [2021-06-10 14:31:42,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2021-06-10 14:31:42,455 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9533333333333334 [2021-06-10 14:31:42,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2021-06-10 14:31:42,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2021-06-10 14:31:42,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2021-06-10 14:31:42,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,456 INFO L185 Difference]: Start difference. First operand has 79 places, 48 transitions, 381 flow. Second operand 3 states and 143 transitions. [2021-06-10 14:31:42,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 47 transitions, 381 flow [2021-06-10 14:31:42,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 47 transitions, 171 flow, removed 105 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,459 INFO L241 Difference]: Finished difference. Result has 80 places, 47 transitions, 171 flow [2021-06-10 14:31:42,459 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=80, PETRI_TRANSITIONS=47} [2021-06-10 14:31:42,459 INFO L343 CegarLoopForPetriNet]: 79 programPoint places, 1 predicate places. [2021-06-10 14:31:42,459 INFO L480 AbstractCegarLoop]: Abstraction has has 80 places, 47 transitions, 171 flow [2021-06-10 14:31:42,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,459 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,459 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-10 14:31:42,459 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2024113101, now seen corresponding path program 1 times [2021-06-10 14:31:42,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16045754] [2021-06-10 14:31:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,463 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,465 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,467 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,467 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-10 14:31:42,467 WARN L342 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,467 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2021-06-10 14:31:42,483 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,483 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,484 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,484 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,484 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,484 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,484 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,484 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,484 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,484 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 86 places, 53 transitions, 426 flow [2021-06-10 14:31:42,491 INFO L129 PetriNetUnfolder]: 0/101 cut-off events. [2021-06-10 14:31:42,491 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 101 events. 0/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 329 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-06-10 14:31:42,491 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 53 transitions, 426 flow [2021-06-10 14:31:42,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 51 transitions, 422 flow [2021-06-10 14:31:42,492 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:42,492 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,492 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,492 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,492 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,493 INFO L82 PathProgramCache]: Analyzing trace with hash 16675, now seen corresponding path program 1 times [2021-06-10 14:31:42,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200167573] [2021-06-10 14:31:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,496 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200167573] [2021-06-10 14:31:42,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169577681] [2021-06-10 14:31:42,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,500 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 53 [2021-06-10 14:31:42,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,500 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,500 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 53 [2021-06-10 14:31:42,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,505 INFO L129 PetriNetUnfolder]: 0/50 cut-off events. [2021-06-10 14:31:42,506 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 17/67 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-06-10 14:31:42,506 INFO L132 encePairwiseOnDemand]: 51/53 looper letters, 0 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2021-06-10 14:31:42,506 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 50 transitions, 422 flow [2021-06-10 14:31:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2021-06-10 14:31:42,506 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9559748427672956 [2021-06-10 14:31:42,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 152 transitions. [2021-06-10 14:31:42,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 152 transitions. [2021-06-10 14:31:42,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 152 transitions. [2021-06-10 14:31:42,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,507 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,507 INFO L185 Difference]: Start difference. First operand has 84 places, 51 transitions, 422 flow. Second operand 3 states and 152 transitions. [2021-06-10 14:31:42,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 50 transitions, 422 flow [2021-06-10 14:31:42,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 50 transitions, 182 flow, removed 120 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,510 INFO L241 Difference]: Finished difference. Result has 85 places, 50 transitions, 182 flow [2021-06-10 14:31:42,510 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=85, PETRI_TRANSITIONS=50} [2021-06-10 14:31:42,510 INFO L343 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2021-06-10 14:31:42,510 INFO L480 AbstractCegarLoop]: Abstraction has has 85 places, 50 transitions, 182 flow [2021-06-10 14:31:42,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,510 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,510 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-10 14:31:42,510 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,510 INFO L82 PathProgramCache]: Analyzing trace with hash 916427584, now seen corresponding path program 1 times [2021-06-10 14:31:42,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061386945] [2021-06-10 14:31:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,514 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,516 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,517 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,517 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-10 14:31:42,518 WARN L342 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,518 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2021-06-10 14:31:42,535 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,535 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,535 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,535 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,535 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,535 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,536 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,536 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,536 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,536 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 91 places, 56 transitions, 469 flow [2021-06-10 14:31:42,543 INFO L129 PetriNetUnfolder]: 0/107 cut-off events. [2021-06-10 14:31:42,543 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 107 events. 0/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 351 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-06-10 14:31:42,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 56 transitions, 469 flow [2021-06-10 14:31:42,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 54 transitions, 465 flow [2021-06-10 14:31:42,544 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:42,544 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,544 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,545 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,545 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash 18467, now seen corresponding path program 1 times [2021-06-10 14:31:42,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573419259] [2021-06-10 14:31:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,549 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,549 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573419259] [2021-06-10 14:31:42,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65758230] [2021-06-10 14:31:42,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,552 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 56 [2021-06-10 14:31:42,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 54 transitions, 465 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 56 [2021-06-10 14:31:42,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,564 INFO L129 PetriNetUnfolder]: 0/53 cut-off events. [2021-06-10 14:31:42,564 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 53 events. 0/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 105 event pairs, 0 based on Foata normal form. 18/71 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-06-10 14:31:42,564 INFO L132 encePairwiseOnDemand]: 54/56 looper letters, 0 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2021-06-10 14:31:42,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 53 transitions, 465 flow [2021-06-10 14:31:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2021-06-10 14:31:42,565 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2021-06-10 14:31:42,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2021-06-10 14:31:42,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2021-06-10 14:31:42,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2021-06-10 14:31:42,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,566 INFO L185 Difference]: Start difference. First operand has 89 places, 54 transitions, 465 flow. Second operand 3 states and 161 transitions. [2021-06-10 14:31:42,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 53 transitions, 465 flow [2021-06-10 14:31:42,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 53 transitions, 193 flow, removed 136 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,567 INFO L241 Difference]: Finished difference. Result has 90 places, 53 transitions, 193 flow [2021-06-10 14:31:42,568 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=90, PETRI_TRANSITIONS=53} [2021-06-10 14:31:42,568 INFO L343 CegarLoopForPetriNet]: 89 programPoint places, 1 predicate places. [2021-06-10 14:31:42,568 INFO L480 AbstractCegarLoop]: Abstraction has has 90 places, 53 transitions, 193 flow [2021-06-10 14:31:42,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,568 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,568 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-10 14:31:42,568 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1820015705, now seen corresponding path program 1 times [2021-06-10 14:31:42,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571279877] [2021-06-10 14:31:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,571 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,573 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,575 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,575 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-10 14:31:42,575 WARN L342 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,575 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2021-06-10 14:31:42,591 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,592 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,592 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,592 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,592 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,592 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,592 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,592 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,592 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,592 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 59 transitions, 514 flow [2021-06-10 14:31:42,599 INFO L129 PetriNetUnfolder]: 0/113 cut-off events. [2021-06-10 14:31:42,599 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 113 events. 0/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 365 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2021-06-10 14:31:42,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 59 transitions, 514 flow [2021-06-10 14:31:42,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 57 transitions, 510 flow [2021-06-10 14:31:42,600 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:42,600 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,600 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,600 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,600 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,601 INFO L82 PathProgramCache]: Analyzing trace with hash 20355, now seen corresponding path program 1 times [2021-06-10 14:31:42,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368975646] [2021-06-10 14:31:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,606 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,606 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368975646] [2021-06-10 14:31:42,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874679692] [2021-06-10 14:31:42,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,609 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 59 [2021-06-10 14:31:42,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 57 transitions, 510 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 59 [2021-06-10 14:31:42,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,620 INFO L129 PetriNetUnfolder]: 0/56 cut-off events. [2021-06-10 14:31:42,620 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 56 events. 0/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 19/75 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2021-06-10 14:31:42,621 INFO L132 encePairwiseOnDemand]: 57/59 looper letters, 0 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2021-06-10 14:31:42,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 56 transitions, 510 flow [2021-06-10 14:31:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2021-06-10 14:31:42,621 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.96045197740113 [2021-06-10 14:31:42,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2021-06-10 14:31:42,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2021-06-10 14:31:42,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2021-06-10 14:31:42,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,622 INFO L185 Difference]: Start difference. First operand has 94 places, 57 transitions, 510 flow. Second operand 3 states and 170 transitions. [2021-06-10 14:31:42,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 56 transitions, 510 flow [2021-06-10 14:31:42,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 56 transitions, 204 flow, removed 153 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,626 INFO L241 Difference]: Finished difference. Result has 95 places, 56 transitions, 204 flow [2021-06-10 14:31:42,627 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=95, PETRI_TRANSITIONS=56} [2021-06-10 14:31:42,627 INFO L343 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2021-06-10 14:31:42,627 INFO L480 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 204 flow [2021-06-10 14:31:42,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,627 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,627 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-10 14:31:42,627 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,627 INFO L82 PathProgramCache]: Analyzing trace with hash 115321539, now seen corresponding path program 1 times [2021-06-10 14:31:42,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002663779] [2021-06-10 14:31:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,635 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,643 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,648 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,648 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-10 14:31:42,649 WARN L342 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,650 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2021-06-10 14:31:42,670 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,670 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,671 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,671 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,671 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,671 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,671 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,671 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,671 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,671 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 101 places, 62 transitions, 561 flow [2021-06-10 14:31:42,679 INFO L129 PetriNetUnfolder]: 0/119 cut-off events. [2021-06-10 14:31:42,679 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 119 events. 0/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 376 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 0. Up to 20 conditions per place. [2021-06-10 14:31:42,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 62 transitions, 561 flow [2021-06-10 14:31:42,680 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 60 transitions, 557 flow [2021-06-10 14:31:42,681 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:42,681 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,681 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,681 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,681 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,681 INFO L82 PathProgramCache]: Analyzing trace with hash 22339, now seen corresponding path program 1 times [2021-06-10 14:31:42,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509296869] [2021-06-10 14:31:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509296869] [2021-06-10 14:31:42,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750649278] [2021-06-10 14:31:42,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,689 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 62 [2021-06-10 14:31:42,689 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 60 transitions, 557 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 62 [2021-06-10 14:31:42,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,695 INFO L129 PetriNetUnfolder]: 0/59 cut-off events. [2021-06-10 14:31:42,695 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 59 events. 0/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 107 event pairs, 0 based on Foata normal form. 20/79 useless extension candidates. Maximal degree in co-relation 0. Up to 20 conditions per place. [2021-06-10 14:31:42,695 INFO L132 encePairwiseOnDemand]: 60/62 looper letters, 0 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2021-06-10 14:31:42,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 59 transitions, 557 flow [2021-06-10 14:31:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2021-06-10 14:31:42,696 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9623655913978495 [2021-06-10 14:31:42,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 179 transitions. [2021-06-10 14:31:42,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 179 transitions. [2021-06-10 14:31:42,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 179 transitions. [2021-06-10 14:31:42,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,697 INFO L185 Difference]: Start difference. First operand has 99 places, 60 transitions, 557 flow. Second operand 3 states and 179 transitions. [2021-06-10 14:31:42,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 59 transitions, 557 flow [2021-06-10 14:31:42,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 59 transitions, 215 flow, removed 171 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,700 INFO L241 Difference]: Finished difference. Result has 100 places, 59 transitions, 215 flow [2021-06-10 14:31:42,700 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=100, PETRI_TRANSITIONS=59} [2021-06-10 14:31:42,700 INFO L343 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2021-06-10 14:31:42,700 INFO L480 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 215 flow [2021-06-10 14:31:42,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,700 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,700 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-10 14:31:42,700 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1667725233, now seen corresponding path program 1 times [2021-06-10 14:31:42,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843114827] [2021-06-10 14:31:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,705 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,708 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,715 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,715 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-10 14:31:42,715 WARN L342 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,716 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2021-06-10 14:31:42,737 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,737 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,737 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,737 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,738 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,738 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,738 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,738 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,738 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,738 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 106 places, 65 transitions, 610 flow [2021-06-10 14:31:42,748 INFO L129 PetriNetUnfolder]: 0/125 cut-off events. [2021-06-10 14:31:42,749 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 125 events. 0/125 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 409 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2021-06-10 14:31:42,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 65 transitions, 610 flow [2021-06-10 14:31:42,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 63 transitions, 606 flow [2021-06-10 14:31:42,750 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:42,750 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,750 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,750 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,750 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,750 INFO L82 PathProgramCache]: Analyzing trace with hash 24419, now seen corresponding path program 1 times [2021-06-10 14:31:42,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712467488] [2021-06-10 14:31:42,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,754 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712467488] [2021-06-10 14:31:42,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784029788] [2021-06-10 14:31:42,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,758 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 65 [2021-06-10 14:31:42,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 63 transitions, 606 flow. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 65 [2021-06-10 14:31:42,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,766 INFO L129 PetriNetUnfolder]: 0/62 cut-off events. [2021-06-10 14:31:42,766 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 62 events. 0/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 21/83 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2021-06-10 14:31:42,766 INFO L132 encePairwiseOnDemand]: 63/65 looper letters, 0 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2021-06-10 14:31:42,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 62 transitions, 606 flow [2021-06-10 14:31:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2021-06-10 14:31:42,767 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9641025641025641 [2021-06-10 14:31:42,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2021-06-10 14:31:42,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2021-06-10 14:31:42,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2021-06-10 14:31:42,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,768 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,768 INFO L185 Difference]: Start difference. First operand has 104 places, 63 transitions, 606 flow. Second operand 3 states and 188 transitions. [2021-06-10 14:31:42,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 62 transitions, 606 flow [2021-06-10 14:31:42,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 62 transitions, 226 flow, removed 190 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,771 INFO L241 Difference]: Finished difference. Result has 105 places, 62 transitions, 226 flow [2021-06-10 14:31:42,771 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=105, PETRI_TRANSITIONS=62} [2021-06-10 14:31:42,771 INFO L343 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2021-06-10 14:31:42,771 INFO L480 AbstractCegarLoop]: Abstraction has has 105 places, 62 transitions, 226 flow [2021-06-10 14:31:42,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,771 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,771 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-10 14:31:42,771 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,772 INFO L82 PathProgramCache]: Analyzing trace with hash -858144122, now seen corresponding path program 1 times [2021-06-10 14:31:42,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016895246] [2021-06-10 14:31:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,776 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,779 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,783 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,783 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-10 14:31:42,784 WARN L342 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,784 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2021-06-10 14:31:42,804 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,805 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,806 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,806 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,806 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,806 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,806 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,806 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,806 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,806 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 111 places, 68 transitions, 661 flow [2021-06-10 14:31:42,814 INFO L129 PetriNetUnfolder]: 0/131 cut-off events. [2021-06-10 14:31:42,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 131 events. 0/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 413 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 0. Up to 22 conditions per place. [2021-06-10 14:31:42,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 68 transitions, 661 flow [2021-06-10 14:31:42,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 66 transitions, 657 flow [2021-06-10 14:31:42,815 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:42,815 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,815 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,815 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,816 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,816 INFO L82 PathProgramCache]: Analyzing trace with hash 26595, now seen corresponding path program 1 times [2021-06-10 14:31:42,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090679246] [2021-06-10 14:31:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090679246] [2021-06-10 14:31:42,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670140392] [2021-06-10 14:31:42,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,824 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 68 [2021-06-10 14:31:42,824 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 66 transitions, 657 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 68 [2021-06-10 14:31:42,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,833 INFO L129 PetriNetUnfolder]: 0/65 cut-off events. [2021-06-10 14:31:42,833 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 65 events. 0/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 135 event pairs, 0 based on Foata normal form. 22/87 useless extension candidates. Maximal degree in co-relation 0. Up to 22 conditions per place. [2021-06-10 14:31:42,834 INFO L132 encePairwiseOnDemand]: 66/68 looper letters, 0 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2021-06-10 14:31:42,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 65 transitions, 657 flow [2021-06-10 14:31:42,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2021-06-10 14:31:42,834 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9656862745098039 [2021-06-10 14:31:42,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2021-06-10 14:31:42,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2021-06-10 14:31:42,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2021-06-10 14:31:42,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,838 INFO L185 Difference]: Start difference. First operand has 109 places, 66 transitions, 657 flow. Second operand 3 states and 197 transitions. [2021-06-10 14:31:42,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 65 transitions, 657 flow [2021-06-10 14:31:42,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 65 transitions, 237 flow, removed 210 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,841 INFO L241 Difference]: Finished difference. Result has 110 places, 65 transitions, 237 flow [2021-06-10 14:31:42,841 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=110, PETRI_TRANSITIONS=65} [2021-06-10 14:31:42,842 INFO L343 CegarLoopForPetriNet]: 109 programPoint places, 1 predicate places. [2021-06-10 14:31:42,842 INFO L480 AbstractCegarLoop]: Abstraction has has 110 places, 65 transitions, 237 flow [2021-06-10 14:31:42,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,842 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,842 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-10 14:31:42,842 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,842 INFO L82 PathProgramCache]: Analyzing trace with hash -615229099, now seen corresponding path program 1 times [2021-06-10 14:31:42,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627834335] [2021-06-10 14:31:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,850 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,852 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,859 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,859 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-10 14:31:42,860 WARN L342 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,861 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2021-06-10 14:31:42,884 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,884 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,885 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,885 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,885 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,885 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,885 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,885 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,885 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,885 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 116 places, 71 transitions, 714 flow [2021-06-10 14:31:42,896 INFO L129 PetriNetUnfolder]: 0/137 cut-off events. [2021-06-10 14:31:42,896 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 137 events. 0/137 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 447 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2021-06-10 14:31:42,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 71 transitions, 714 flow [2021-06-10 14:31:42,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 69 transitions, 710 flow [2021-06-10 14:31:42,898 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:42,898 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,898 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,898 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:42,898 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,899 INFO L82 PathProgramCache]: Analyzing trace with hash 28867, now seen corresponding path program 1 times [2021-06-10 14:31:42,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763853043] [2021-06-10 14:31:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:42,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:42,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:42,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763853043] [2021-06-10 14:31:42,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:42,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:42,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606826138] [2021-06-10 14:31:42,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:42,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:42,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:42,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:42,908 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 71 [2021-06-10 14:31:42,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 69 transitions, 710 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:42,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 71 [2021-06-10 14:31:42,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:42,917 INFO L129 PetriNetUnfolder]: 0/68 cut-off events. [2021-06-10 14:31:42,917 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:42,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 68 events. 0/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 129 event pairs, 0 based on Foata normal form. 23/91 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2021-06-10 14:31:42,917 INFO L132 encePairwiseOnDemand]: 69/71 looper letters, 0 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2021-06-10 14:31:42,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 68 transitions, 710 flow [2021-06-10 14:31:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2021-06-10 14:31:42,918 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9671361502347418 [2021-06-10 14:31:42,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2021-06-10 14:31:42,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2021-06-10 14:31:42,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:42,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2021-06-10 14:31:42,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,919 INFO L185 Difference]: Start difference. First operand has 114 places, 69 transitions, 710 flow. Second operand 3 states and 206 transitions. [2021-06-10 14:31:42,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 68 transitions, 710 flow [2021-06-10 14:31:42,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 68 transitions, 248 flow, removed 231 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:42,923 INFO L241 Difference]: Finished difference. Result has 115 places, 68 transitions, 248 flow [2021-06-10 14:31:42,924 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=115, PETRI_TRANSITIONS=68} [2021-06-10 14:31:42,924 INFO L343 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2021-06-10 14:31:42,924 INFO L480 AbstractCegarLoop]: Abstraction has has 115 places, 68 transitions, 248 flow [2021-06-10 14:31:42,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:42,924 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:42,924 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:42,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-10 14:31:42,924 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2063505161, now seen corresponding path program 1 times [2021-06-10 14:31:42,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:42,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235289464] [2021-06-10 14:31:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,928 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:42,930 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:42,934 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:42,934 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:42,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-10 14:31:42,934 WARN L342 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:42,935 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2021-06-10 14:31:42,988 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:42,988 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:42,989 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:42,989 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:42,989 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:42,989 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:42,989 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:42,989 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:42,989 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:42,989 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:42,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 121 places, 74 transitions, 769 flow [2021-06-10 14:31:43,000 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2021-06-10 14:31:43,000 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 143 events. 0/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 469 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2021-06-10 14:31:43,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 74 transitions, 769 flow [2021-06-10 14:31:43,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 72 transitions, 765 flow [2021-06-10 14:31:43,001 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:43,001 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,001 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,001 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:43,001 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,001 INFO L82 PathProgramCache]: Analyzing trace with hash 31235, now seen corresponding path program 1 times [2021-06-10 14:31:43,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811710021] [2021-06-10 14:31:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:43,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:43,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:43,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811710021] [2021-06-10 14:31:43,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:43,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:43,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137352255] [2021-06-10 14:31:43,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:43,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:43,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:43,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:43,008 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 74 [2021-06-10 14:31:43,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 72 transitions, 765 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:43,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 74 [2021-06-10 14:31:43,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:43,016 INFO L129 PetriNetUnfolder]: 0/71 cut-off events. [2021-06-10 14:31:43,016 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 71 events. 0/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 137 event pairs, 0 based on Foata normal form. 24/95 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2021-06-10 14:31:43,016 INFO L132 encePairwiseOnDemand]: 72/74 looper letters, 0 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2021-06-10 14:31:43,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 71 transitions, 765 flow [2021-06-10 14:31:43,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2021-06-10 14:31:43,017 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9684684684684685 [2021-06-10 14:31:43,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2021-06-10 14:31:43,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2021-06-10 14:31:43,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:43,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2021-06-10 14:31:43,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,019 INFO L185 Difference]: Start difference. First operand has 119 places, 72 transitions, 765 flow. Second operand 3 states and 215 transitions. [2021-06-10 14:31:43,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 71 transitions, 765 flow [2021-06-10 14:31:43,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 71 transitions, 259 flow, removed 253 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:43,022 INFO L241 Difference]: Finished difference. Result has 120 places, 71 transitions, 259 flow [2021-06-10 14:31:43,022 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=120, PETRI_TRANSITIONS=71} [2021-06-10 14:31:43,022 INFO L343 CegarLoopForPetriNet]: 119 programPoint places, 1 predicate places. [2021-06-10 14:31:43,022 INFO L480 AbstractCegarLoop]: Abstraction has has 120 places, 71 transitions, 259 flow [2021-06-10 14:31:43,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,023 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,023 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:43,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-10 14:31:43,023 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1486505157, now seen corresponding path program 1 times [2021-06-10 14:31:43,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254133307] [2021-06-10 14:31:43,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,029 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,031 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,034 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:43,034 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:43,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-10 14:31:43,034 WARN L342 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:43,034 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2021-06-10 14:31:43,054 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:43,054 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:43,054 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:43,054 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:43,054 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:43,054 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:43,054 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:43,054 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:43,054 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:43,054 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:43,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 126 places, 77 transitions, 826 flow [2021-06-10 14:31:43,065 INFO L129 PetriNetUnfolder]: 0/149 cut-off events. [2021-06-10 14:31:43,065 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 149 events. 0/149 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 472 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2021-06-10 14:31:43,065 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 77 transitions, 826 flow [2021-06-10 14:31:43,066 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 75 transitions, 822 flow [2021-06-10 14:31:43,066 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:43,066 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,067 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,067 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:43,067 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash 33699, now seen corresponding path program 1 times [2021-06-10 14:31:43,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222718360] [2021-06-10 14:31:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:43,072 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:43,072 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:43,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222718360] [2021-06-10 14:31:43,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:43,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:43,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667757626] [2021-06-10 14:31:43,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:43,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:43,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:43,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:43,075 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 77 [2021-06-10 14:31:43,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 75 transitions, 822 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:43,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 77 [2021-06-10 14:31:43,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:43,083 INFO L129 PetriNetUnfolder]: 0/74 cut-off events. [2021-06-10 14:31:43,083 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 74 events. 0/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 147 event pairs, 0 based on Foata normal form. 25/99 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2021-06-10 14:31:43,083 INFO L132 encePairwiseOnDemand]: 75/77 looper letters, 0 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2021-06-10 14:31:43,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 74 transitions, 822 flow [2021-06-10 14:31:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:43,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2021-06-10 14:31:43,084 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9696969696969697 [2021-06-10 14:31:43,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2021-06-10 14:31:43,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2021-06-10 14:31:43,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:43,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2021-06-10 14:31:43,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,094 INFO L185 Difference]: Start difference. First operand has 124 places, 75 transitions, 822 flow. Second operand 3 states and 224 transitions. [2021-06-10 14:31:43,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 74 transitions, 822 flow [2021-06-10 14:31:43,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 74 transitions, 270 flow, removed 276 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:43,099 INFO L241 Difference]: Finished difference. Result has 125 places, 74 transitions, 270 flow [2021-06-10 14:31:43,099 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=125, PETRI_TRANSITIONS=74} [2021-06-10 14:31:43,099 INFO L343 CegarLoopForPetriNet]: 124 programPoint places, 1 predicate places. [2021-06-10 14:31:43,099 INFO L480 AbstractCegarLoop]: Abstraction has has 125 places, 74 transitions, 270 flow [2021-06-10 14:31:43,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,100 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,100 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:43,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-10 14:31:43,100 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1412913972, now seen corresponding path program 1 times [2021-06-10 14:31:43,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409760988] [2021-06-10 14:31:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,104 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,110 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,118 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:43,118 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:43,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-10 14:31:43,118 WARN L342 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:43,118 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2021-06-10 14:31:43,138 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:43,139 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:43,139 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:43,139 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:43,139 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:43,139 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:43,139 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:43,139 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:43,139 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:43,139 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:43,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 131 places, 80 transitions, 885 flow [2021-06-10 14:31:43,150 INFO L129 PetriNetUnfolder]: 0/155 cut-off events. [2021-06-10 14:31:43,150 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 155 events. 0/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 522 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 0. Up to 26 conditions per place. [2021-06-10 14:31:43,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 80 transitions, 885 flow [2021-06-10 14:31:43,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 78 transitions, 881 flow [2021-06-10 14:31:43,151 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:43,151 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,151 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,152 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:43,152 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,152 INFO L82 PathProgramCache]: Analyzing trace with hash 36259, now seen corresponding path program 1 times [2021-06-10 14:31:43,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552743158] [2021-06-10 14:31:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:43,156 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:43,157 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:43,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552743158] [2021-06-10 14:31:43,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:43,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:43,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93364609] [2021-06-10 14:31:43,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:43,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:43,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:43,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:43,159 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 80 [2021-06-10 14:31:43,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 78 transitions, 881 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:43,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 80 [2021-06-10 14:31:43,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:43,167 INFO L129 PetriNetUnfolder]: 0/77 cut-off events. [2021-06-10 14:31:43,167 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 77 events. 0/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 142 event pairs, 0 based on Foata normal form. 26/103 useless extension candidates. Maximal degree in co-relation 0. Up to 26 conditions per place. [2021-06-10 14:31:43,168 INFO L132 encePairwiseOnDemand]: 78/80 looper letters, 0 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2021-06-10 14:31:43,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 77 transitions, 881 flow [2021-06-10 14:31:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2021-06-10 14:31:43,168 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9708333333333333 [2021-06-10 14:31:43,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2021-06-10 14:31:43,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2021-06-10 14:31:43,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:43,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2021-06-10 14:31:43,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,169 INFO L185 Difference]: Start difference. First operand has 129 places, 78 transitions, 881 flow. Second operand 3 states and 233 transitions. [2021-06-10 14:31:43,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 77 transitions, 881 flow [2021-06-10 14:31:43,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 77 transitions, 281 flow, removed 300 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:43,174 INFO L241 Difference]: Finished difference. Result has 130 places, 77 transitions, 281 flow [2021-06-10 14:31:43,175 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=130, PETRI_TRANSITIONS=77} [2021-06-10 14:31:43,175 INFO L343 CegarLoopForPetriNet]: 129 programPoint places, 1 predicate places. [2021-06-10 14:31:43,175 INFO L480 AbstractCegarLoop]: Abstraction has has 130 places, 77 transitions, 281 flow [2021-06-10 14:31:43,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,175 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,175 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:43,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-10 14:31:43,175 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1752179327, now seen corresponding path program 1 times [2021-06-10 14:31:43,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600119455] [2021-06-10 14:31:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,179 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,180 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,182 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:43,182 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:43,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-10 14:31:43,182 WARN L342 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:43,182 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2021-06-10 14:31:43,201 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:43,201 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:43,202 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:43,202 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:43,202 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:43,202 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:43,202 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:43,202 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:43,202 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:43,202 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:43,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 136 places, 83 transitions, 946 flow [2021-06-10 14:31:43,213 INFO L129 PetriNetUnfolder]: 0/161 cut-off events. [2021-06-10 14:31:43,213 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 161 events. 0/161 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 505 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2021-06-10 14:31:43,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 83 transitions, 946 flow [2021-06-10 14:31:43,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 81 transitions, 942 flow [2021-06-10 14:31:43,214 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:43,214 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,214 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,214 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:43,214 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,215 INFO L82 PathProgramCache]: Analyzing trace with hash 38915, now seen corresponding path program 1 times [2021-06-10 14:31:43,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351156305] [2021-06-10 14:31:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:43,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:43,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:43,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351156305] [2021-06-10 14:31:43,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:43,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:43,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298833370] [2021-06-10 14:31:43,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:43,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:43,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:43,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:43,224 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 83 [2021-06-10 14:31:43,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 81 transitions, 942 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:43,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 83 [2021-06-10 14:31:43,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:43,233 INFO L129 PetriNetUnfolder]: 0/80 cut-off events. [2021-06-10 14:31:43,233 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 80 events. 0/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 129 event pairs, 0 based on Foata normal form. 27/107 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2021-06-10 14:31:43,234 INFO L132 encePairwiseOnDemand]: 81/83 looper letters, 0 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2021-06-10 14:31:43,235 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 80 transitions, 942 flow [2021-06-10 14:31:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2021-06-10 14:31:43,235 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9718875502008032 [2021-06-10 14:31:43,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2021-06-10 14:31:43,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2021-06-10 14:31:43,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:43,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2021-06-10 14:31:43,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,237 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,237 INFO L185 Difference]: Start difference. First operand has 134 places, 81 transitions, 942 flow. Second operand 3 states and 242 transitions. [2021-06-10 14:31:43,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 80 transitions, 942 flow [2021-06-10 14:31:43,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 80 transitions, 292 flow, removed 325 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:43,242 INFO L241 Difference]: Finished difference. Result has 135 places, 80 transitions, 292 flow [2021-06-10 14:31:43,242 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=135, PETRI_TRANSITIONS=80} [2021-06-10 14:31:43,242 INFO L343 CegarLoopForPetriNet]: 134 programPoint places, 1 predicate places. [2021-06-10 14:31:43,242 INFO L480 AbstractCegarLoop]: Abstraction has has 135 places, 80 transitions, 292 flow [2021-06-10 14:31:43,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,242 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,242 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:43,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-10 14:31:43,242 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1126967375, now seen corresponding path program 1 times [2021-06-10 14:31:43,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466307364] [2021-06-10 14:31:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,247 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,248 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,252 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:43,253 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:43,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-10 14:31:43,253 WARN L342 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:43,254 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2021-06-10 14:31:43,272 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:43,272 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:43,273 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:43,273 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:43,273 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:43,273 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:43,273 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:43,273 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:43,273 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:43,273 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:43,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 86 transitions, 1009 flow [2021-06-10 14:31:43,285 INFO L129 PetriNetUnfolder]: 0/167 cut-off events. [2021-06-10 14:31:43,285 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 167 events. 0/167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 560 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2021-06-10 14:31:43,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 86 transitions, 1009 flow [2021-06-10 14:31:43,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 84 transitions, 1005 flow [2021-06-10 14:31:43,286 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:43,286 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,286 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,286 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:43,287 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,287 INFO L82 PathProgramCache]: Analyzing trace with hash 41667, now seen corresponding path program 1 times [2021-06-10 14:31:43,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569438413] [2021-06-10 14:31:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:43,291 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:43,292 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:43,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569438413] [2021-06-10 14:31:43,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:43,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:43,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595327383] [2021-06-10 14:31:43,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:43,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:43,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:43,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:43,294 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 86 [2021-06-10 14:31:43,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 84 transitions, 1005 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:43,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 86 [2021-06-10 14:31:43,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:43,303 INFO L129 PetriNetUnfolder]: 0/83 cut-off events. [2021-06-10 14:31:43,303 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 83 events. 0/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 174 event pairs, 0 based on Foata normal form. 28/111 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2021-06-10 14:31:43,304 INFO L132 encePairwiseOnDemand]: 84/86 looper letters, 0 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2021-06-10 14:31:43,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 83 transitions, 1005 flow [2021-06-10 14:31:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2021-06-10 14:31:43,304 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9728682170542635 [2021-06-10 14:31:43,304 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2021-06-10 14:31:43,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2021-06-10 14:31:43,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:43,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2021-06-10 14:31:43,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,305 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,305 INFO L185 Difference]: Start difference. First operand has 139 places, 84 transitions, 1005 flow. Second operand 3 states and 251 transitions. [2021-06-10 14:31:43,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 83 transitions, 1005 flow [2021-06-10 14:31:43,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 83 transitions, 303 flow, removed 351 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:43,311 INFO L241 Difference]: Finished difference. Result has 140 places, 83 transitions, 303 flow [2021-06-10 14:31:43,311 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=303, PETRI_PLACES=140, PETRI_TRANSITIONS=83} [2021-06-10 14:31:43,311 INFO L343 CegarLoopForPetriNet]: 139 programPoint places, 1 predicate places. [2021-06-10 14:31:43,311 INFO L480 AbstractCegarLoop]: Abstraction has has 140 places, 83 transitions, 303 flow [2021-06-10 14:31:43,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,311 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,311 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:43,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-10 14:31:43,311 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,311 INFO L82 PathProgramCache]: Analyzing trace with hash 941229833, now seen corresponding path program 1 times [2021-06-10 14:31:43,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954386630] [2021-06-10 14:31:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,316 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,317 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,319 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:43,319 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:43,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-06-10 14:31:43,319 WARN L342 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:43,320 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2021-06-10 14:31:43,350 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:43,350 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:43,351 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:43,351 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:43,351 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:43,351 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:43,351 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:43,351 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:43,351 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:43,351 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:43,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 146 places, 89 transitions, 1074 flow [2021-06-10 14:31:43,365 INFO L129 PetriNetUnfolder]: 0/173 cut-off events. [2021-06-10 14:31:43,365 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 173 events. 0/173 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 574 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2021-06-10 14:31:43,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 89 transitions, 1074 flow [2021-06-10 14:31:43,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 87 transitions, 1070 flow [2021-06-10 14:31:43,366 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:43,366 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,367 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,367 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:43,367 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,367 INFO L82 PathProgramCache]: Analyzing trace with hash 44515, now seen corresponding path program 1 times [2021-06-10 14:31:43,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145412613] [2021-06-10 14:31:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:43,373 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:43,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:43,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145412613] [2021-06-10 14:31:43,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:43,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:43,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266735837] [2021-06-10 14:31:43,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:43,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:43,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:43,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:43,375 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 89 [2021-06-10 14:31:43,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 87 transitions, 1070 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:43,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 89 [2021-06-10 14:31:43,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:43,386 INFO L129 PetriNetUnfolder]: 0/86 cut-off events. [2021-06-10 14:31:43,386 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 86 events. 0/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 183 event pairs, 0 based on Foata normal form. 29/115 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2021-06-10 14:31:43,386 INFO L132 encePairwiseOnDemand]: 87/89 looper letters, 0 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2021-06-10 14:31:43,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 86 transitions, 1070 flow [2021-06-10 14:31:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:43,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2021-06-10 14:31:43,387 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9737827715355806 [2021-06-10 14:31:43,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2021-06-10 14:31:43,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2021-06-10 14:31:43,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:43,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2021-06-10 14:31:43,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,388 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,388 INFO L185 Difference]: Start difference. First operand has 144 places, 87 transitions, 1070 flow. Second operand 3 states and 260 transitions. [2021-06-10 14:31:43,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 86 transitions, 1070 flow [2021-06-10 14:31:43,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 86 transitions, 314 flow, removed 378 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:43,394 INFO L241 Difference]: Finished difference. Result has 145 places, 86 transitions, 314 flow [2021-06-10 14:31:43,394 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=145, PETRI_TRANSITIONS=86} [2021-06-10 14:31:43,394 INFO L343 CegarLoopForPetriNet]: 144 programPoint places, 1 predicate places. [2021-06-10 14:31:43,394 INFO L480 AbstractCegarLoop]: Abstraction has has 145 places, 86 transitions, 314 flow [2021-06-10 14:31:43,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,394 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,394 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:43,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-10 14:31:43,394 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1443307026, now seen corresponding path program 1 times [2021-06-10 14:31:43,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559880905] [2021-06-10 14:31:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,399 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,400 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,402 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:43,403 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:43,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-06-10 14:31:43,403 WARN L342 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:43,403 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2021-06-10 14:31:43,445 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:43,445 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:43,446 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:43,446 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:43,446 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:43,446 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:43,446 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:43,446 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:43,446 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:43,446 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:43,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 151 places, 92 transitions, 1141 flow [2021-06-10 14:31:43,464 INFO L129 PetriNetUnfolder]: 0/179 cut-off events. [2021-06-10 14:31:43,464 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 179 events. 0/179 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 587 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2021-06-10 14:31:43,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 92 transitions, 1141 flow [2021-06-10 14:31:43,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 90 transitions, 1137 flow [2021-06-10 14:31:43,465 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:43,465 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,465 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,465 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:43,466 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,466 INFO L82 PathProgramCache]: Analyzing trace with hash 47459, now seen corresponding path program 1 times [2021-06-10 14:31:43,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390731451] [2021-06-10 14:31:43,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:43,473 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:43,473 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:43,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390731451] [2021-06-10 14:31:43,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:43,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:43,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318645055] [2021-06-10 14:31:43,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:43,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:43,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:43,477 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 92 [2021-06-10 14:31:43,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 90 transitions, 1137 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:43,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 92 [2021-06-10 14:31:43,477 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:43,490 INFO L129 PetriNetUnfolder]: 0/89 cut-off events. [2021-06-10 14:31:43,490 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 89 events. 0/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 162 event pairs, 0 based on Foata normal form. 30/119 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2021-06-10 14:31:43,490 INFO L132 encePairwiseOnDemand]: 90/92 looper letters, 0 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2021-06-10 14:31:43,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 89 transitions, 1137 flow [2021-06-10 14:31:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:43,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2021-06-10 14:31:43,491 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9746376811594203 [2021-06-10 14:31:43,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2021-06-10 14:31:43,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2021-06-10 14:31:43,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:43,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2021-06-10 14:31:43,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,492 INFO L185 Difference]: Start difference. First operand has 149 places, 90 transitions, 1137 flow. Second operand 3 states and 269 transitions. [2021-06-10 14:31:43,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 89 transitions, 1137 flow [2021-06-10 14:31:43,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 89 transitions, 325 flow, removed 406 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:43,500 INFO L241 Difference]: Finished difference. Result has 150 places, 89 transitions, 325 flow [2021-06-10 14:31:43,500 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=325, PETRI_PLACES=150, PETRI_TRANSITIONS=89} [2021-06-10 14:31:43,501 INFO L343 CegarLoopForPetriNet]: 149 programPoint places, 1 predicate places. [2021-06-10 14:31:43,501 INFO L480 AbstractCegarLoop]: Abstraction has has 150 places, 89 transitions, 325 flow [2021-06-10 14:31:43,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,502 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,502 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:43,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-06-10 14:31:43,502 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1664869597, now seen corresponding path program 1 times [2021-06-10 14:31:43,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844819288] [2021-06-10 14:31:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,507 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,508 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,512 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:43,513 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:43,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-06-10 14:31:43,513 WARN L342 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:43,513 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2021-06-10 14:31:43,535 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:43,536 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:43,536 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:43,536 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:43,536 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:43,536 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:43,536 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:43,536 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:43,537 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:43,537 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:43,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 95 transitions, 1210 flow [2021-06-10 14:31:43,554 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2021-06-10 14:31:43,554 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 185 events. 0/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 595 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2021-06-10 14:31:43,554 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 95 transitions, 1210 flow [2021-06-10 14:31:43,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 93 transitions, 1206 flow [2021-06-10 14:31:43,557 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:43,557 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,557 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,557 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:43,558 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,558 INFO L82 PathProgramCache]: Analyzing trace with hash 50499, now seen corresponding path program 1 times [2021-06-10 14:31:43,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798671512] [2021-06-10 14:31:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:43,564 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:43,564 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:43,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798671512] [2021-06-10 14:31:43,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:43,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:43,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813887704] [2021-06-10 14:31:43,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:43,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:43,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:43,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:43,567 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 95 [2021-06-10 14:31:43,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 93 transitions, 1206 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:43,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 95 [2021-06-10 14:31:43,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:43,582 INFO L129 PetriNetUnfolder]: 0/92 cut-off events. [2021-06-10 14:31:43,582 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 92 events. 0/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 31/123 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2021-06-10 14:31:43,582 INFO L132 encePairwiseOnDemand]: 93/95 looper letters, 0 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2021-06-10 14:31:43,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 92 transitions, 1206 flow [2021-06-10 14:31:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:43,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2021-06-10 14:31:43,583 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9754385964912281 [2021-06-10 14:31:43,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2021-06-10 14:31:43,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2021-06-10 14:31:43,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:43,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2021-06-10 14:31:43,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,584 INFO L185 Difference]: Start difference. First operand has 154 places, 93 transitions, 1206 flow. Second operand 3 states and 278 transitions. [2021-06-10 14:31:43,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 92 transitions, 1206 flow [2021-06-10 14:31:43,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 92 transitions, 336 flow, removed 435 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:43,591 INFO L241 Difference]: Finished difference. Result has 155 places, 92 transitions, 336 flow [2021-06-10 14:31:43,592 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=155, PETRI_TRANSITIONS=92} [2021-06-10 14:31:43,592 INFO L343 CegarLoopForPetriNet]: 154 programPoint places, 1 predicate places. [2021-06-10 14:31:43,592 INFO L480 AbstractCegarLoop]: Abstraction has has 155 places, 92 transitions, 336 flow [2021-06-10 14:31:43,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,592 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,592 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:43,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-06-10 14:31:43,592 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,592 INFO L82 PathProgramCache]: Analyzing trace with hash -678346091, now seen corresponding path program 1 times [2021-06-10 14:31:43,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860339084] [2021-06-10 14:31:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,597 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,598 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,601 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:43,601 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:43,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-06-10 14:31:43,601 WARN L342 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:43,602 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2021-06-10 14:31:43,622 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:43,622 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:43,623 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:43,623 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:43,623 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:43,623 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:43,623 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:43,623 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:43,623 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:43,623 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:43,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 161 places, 98 transitions, 1281 flow [2021-06-10 14:31:43,638 INFO L129 PetriNetUnfolder]: 0/191 cut-off events. [2021-06-10 14:31:43,638 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 191 events. 0/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 612 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2021-06-10 14:31:43,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 98 transitions, 1281 flow [2021-06-10 14:31:43,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 96 transitions, 1277 flow [2021-06-10 14:31:43,640 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:43,640 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,640 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,640 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:43,640 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,640 INFO L82 PathProgramCache]: Analyzing trace with hash 53635, now seen corresponding path program 1 times [2021-06-10 14:31:43,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873319070] [2021-06-10 14:31:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:43,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:43,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:43,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873319070] [2021-06-10 14:31:43,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:43,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:43,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019739691] [2021-06-10 14:31:43,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:43,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:43,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:43,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:43,648 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 98 [2021-06-10 14:31:43,648 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 96 transitions, 1277 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:43,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 98 [2021-06-10 14:31:43,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:43,660 INFO L129 PetriNetUnfolder]: 0/95 cut-off events. [2021-06-10 14:31:43,660 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 95 events. 0/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 175 event pairs, 0 based on Foata normal form. 32/127 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2021-06-10 14:31:43,661 INFO L132 encePairwiseOnDemand]: 96/98 looper letters, 0 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2021-06-10 14:31:43,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 95 transitions, 1277 flow [2021-06-10 14:31:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:43,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2021-06-10 14:31:43,661 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9761904761904762 [2021-06-10 14:31:43,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2021-06-10 14:31:43,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2021-06-10 14:31:43,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:43,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2021-06-10 14:31:43,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,662 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,662 INFO L185 Difference]: Start difference. First operand has 159 places, 96 transitions, 1277 flow. Second operand 3 states and 287 transitions. [2021-06-10 14:31:43,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 95 transitions, 1277 flow [2021-06-10 14:31:43,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 95 transitions, 347 flow, removed 465 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:43,670 INFO L241 Difference]: Finished difference. Result has 160 places, 95 transitions, 347 flow [2021-06-10 14:31:43,670 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=160, PETRI_TRANSITIONS=95} [2021-06-10 14:31:43,671 INFO L343 CegarLoopForPetriNet]: 159 programPoint places, 1 predicate places. [2021-06-10 14:31:43,671 INFO L480 AbstractCegarLoop]: Abstraction has has 160 places, 95 transitions, 347 flow [2021-06-10 14:31:43,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,671 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,671 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:43,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-06-10 14:31:43,671 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,671 INFO L82 PathProgramCache]: Analyzing trace with hash -358163843, now seen corresponding path program 1 times [2021-06-10 14:31:43,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880775707] [2021-06-10 14:31:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,677 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,678 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,681 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:43,681 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:43,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-06-10 14:31:43,681 WARN L342 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:43,682 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2021-06-10 14:31:43,704 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:43,704 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:43,704 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:43,704 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:43,704 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:43,704 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:43,704 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:43,704 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:43,704 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:43,704 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:43,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 101 transitions, 1354 flow [2021-06-10 14:31:43,722 INFO L129 PetriNetUnfolder]: 0/197 cut-off events. [2021-06-10 14:31:43,722 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,722 INFO L84 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 197 events. 0/197 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 637 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2021-06-10 14:31:43,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 101 transitions, 1354 flow [2021-06-10 14:31:43,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 99 transitions, 1350 flow [2021-06-10 14:31:43,723 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:43,723 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,724 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,724 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:43,724 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,724 INFO L82 PathProgramCache]: Analyzing trace with hash 56867, now seen corresponding path program 1 times [2021-06-10 14:31:43,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583185088] [2021-06-10 14:31:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:43,732 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:43,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:43,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583185088] [2021-06-10 14:31:43,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:43,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:43,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864443322] [2021-06-10 14:31:43,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:43,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:43,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:43,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:43,737 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 101 [2021-06-10 14:31:43,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 99 transitions, 1350 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:43,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 101 [2021-06-10 14:31:43,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:43,750 INFO L129 PetriNetUnfolder]: 0/98 cut-off events. [2021-06-10 14:31:43,750 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 98 events. 0/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 197 event pairs, 0 based on Foata normal form. 33/131 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2021-06-10 14:31:43,751 INFO L132 encePairwiseOnDemand]: 99/101 looper letters, 0 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2021-06-10 14:31:43,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 98 transitions, 1350 flow [2021-06-10 14:31:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2021-06-10 14:31:43,751 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.976897689768977 [2021-06-10 14:31:43,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2021-06-10 14:31:43,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2021-06-10 14:31:43,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:43,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2021-06-10 14:31:43,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,753 INFO L185 Difference]: Start difference. First operand has 164 places, 99 transitions, 1350 flow. Second operand 3 states and 296 transitions. [2021-06-10 14:31:43,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 98 transitions, 1350 flow [2021-06-10 14:31:43,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 98 transitions, 358 flow, removed 496 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:43,761 INFO L241 Difference]: Finished difference. Result has 165 places, 98 transitions, 358 flow [2021-06-10 14:31:43,762 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=165, PETRI_TRANSITIONS=98} [2021-06-10 14:31:43,762 INFO L343 CegarLoopForPetriNet]: 164 programPoint places, 1 predicate places. [2021-06-10 14:31:43,762 INFO L480 AbstractCegarLoop]: Abstraction has has 165 places, 98 transitions, 358 flow [2021-06-10 14:31:43,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,762 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,762 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:43,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-06-10 14:31:43,762 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1932783016, now seen corresponding path program 1 times [2021-06-10 14:31:43,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938418026] [2021-06-10 14:31:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,769 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,771 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,774 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:43,774 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:43,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-10 14:31:43,774 WARN L342 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:43,774 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2021-06-10 14:31:43,800 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:43,801 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:43,801 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:43,801 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:43,801 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:43,801 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:43,801 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:43,801 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:43,801 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:43,801 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:43,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 171 places, 104 transitions, 1429 flow [2021-06-10 14:31:43,820 INFO L129 PetriNetUnfolder]: 0/203 cut-off events. [2021-06-10 14:31:43,820 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 203 events. 0/203 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 653 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2021-06-10 14:31:43,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 104 transitions, 1429 flow [2021-06-10 14:31:43,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 102 transitions, 1425 flow [2021-06-10 14:31:43,821 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:43,821 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,821 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,821 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:43,821 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,821 INFO L82 PathProgramCache]: Analyzing trace with hash 60195, now seen corresponding path program 1 times [2021-06-10 14:31:43,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716120392] [2021-06-10 14:31:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:43,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:43,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:43,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716120392] [2021-06-10 14:31:43,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:43,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:43,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703162046] [2021-06-10 14:31:43,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:43,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:43,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:43,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:43,829 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 104 [2021-06-10 14:31:43,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 102 transitions, 1425 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:43,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 104 [2021-06-10 14:31:43,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:43,846 INFO L129 PetriNetUnfolder]: 0/101 cut-off events. [2021-06-10 14:31:43,846 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 101 events. 0/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 206 event pairs, 0 based on Foata normal form. 34/135 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2021-06-10 14:31:43,846 INFO L132 encePairwiseOnDemand]: 102/104 looper letters, 0 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2021-06-10 14:31:43,847 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 101 transitions, 1425 flow [2021-06-10 14:31:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2021-06-10 14:31:43,847 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9775641025641025 [2021-06-10 14:31:43,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2021-06-10 14:31:43,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2021-06-10 14:31:43,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:43,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2021-06-10 14:31:43,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,848 INFO L185 Difference]: Start difference. First operand has 169 places, 102 transitions, 1425 flow. Second operand 3 states and 305 transitions. [2021-06-10 14:31:43,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 101 transitions, 1425 flow [2021-06-10 14:31:43,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 101 transitions, 369 flow, removed 528 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:43,857 INFO L241 Difference]: Finished difference. Result has 170 places, 101 transitions, 369 flow [2021-06-10 14:31:43,857 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=170, PETRI_TRANSITIONS=101} [2021-06-10 14:31:43,857 INFO L343 CegarLoopForPetriNet]: 169 programPoint places, 1 predicate places. [2021-06-10 14:31:43,857 INFO L480 AbstractCegarLoop]: Abstraction has has 170 places, 101 transitions, 369 flow [2021-06-10 14:31:43,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,858 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,858 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:43,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-10 14:31:43,858 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1649052521, now seen corresponding path program 1 times [2021-06-10 14:31:43,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305757982] [2021-06-10 14:31:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,863 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,864 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,868 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:43,868 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:43,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-06-10 14:31:43,868 WARN L342 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:43,868 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2021-06-10 14:31:43,891 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:43,891 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:43,891 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:43,891 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:43,891 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:43,892 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:43,892 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:43,892 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:43,892 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:43,892 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:43,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 176 places, 107 transitions, 1506 flow [2021-06-10 14:31:43,928 INFO L129 PetriNetUnfolder]: 0/209 cut-off events. [2021-06-10 14:31:43,928 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,928 INFO L84 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 209 events. 0/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 678 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2021-06-10 14:31:43,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 107 transitions, 1506 flow [2021-06-10 14:31:43,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 105 transitions, 1502 flow [2021-06-10 14:31:43,930 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:43,930 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,930 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,930 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:43,930 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,930 INFO L82 PathProgramCache]: Analyzing trace with hash 63619, now seen corresponding path program 1 times [2021-06-10 14:31:43,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115234862] [2021-06-10 14:31:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:43,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:43,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:43,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115234862] [2021-06-10 14:31:43,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:43,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:43,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410115372] [2021-06-10 14:31:43,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:43,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:43,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:43,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:43,938 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 107 [2021-06-10 14:31:43,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 105 transitions, 1502 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:43,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 107 [2021-06-10 14:31:43,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:43,952 INFO L129 PetriNetUnfolder]: 0/104 cut-off events. [2021-06-10 14:31:43,952 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:43,952 INFO L84 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 104 events. 0/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 217 event pairs, 0 based on Foata normal form. 35/139 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2021-06-10 14:31:43,953 INFO L132 encePairwiseOnDemand]: 105/107 looper letters, 0 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2021-06-10 14:31:43,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 104 transitions, 1502 flow [2021-06-10 14:31:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2021-06-10 14:31:43,953 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9781931464174455 [2021-06-10 14:31:43,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2021-06-10 14:31:43,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2021-06-10 14:31:43,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:43,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2021-06-10 14:31:43,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,955 INFO L185 Difference]: Start difference. First operand has 174 places, 105 transitions, 1502 flow. Second operand 3 states and 314 transitions. [2021-06-10 14:31:43,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 104 transitions, 1502 flow [2021-06-10 14:31:43,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 104 transitions, 380 flow, removed 561 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:43,963 INFO L241 Difference]: Finished difference. Result has 175 places, 104 transitions, 380 flow [2021-06-10 14:31:43,963 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=175, PETRI_TRANSITIONS=104} [2021-06-10 14:31:43,963 INFO L343 CegarLoopForPetriNet]: 174 programPoint places, 1 predicate places. [2021-06-10 14:31:43,964 INFO L480 AbstractCegarLoop]: Abstraction has has 175 places, 104 transitions, 380 flow [2021-06-10 14:31:43,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:43,964 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:43,964 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:43,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-10 14:31:43,964 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:43,964 INFO L82 PathProgramCache]: Analyzing trace with hash -973944357, now seen corresponding path program 1 times [2021-06-10 14:31:43,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:43,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644978761] [2021-06-10 14:31:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,969 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:43,970 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:43,974 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:43,974 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:43,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-06-10 14:31:43,974 WARN L342 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:43,974 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2021-06-10 14:31:43,999 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:43,999 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:43,999 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:43,999 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:43,999 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:43,999 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:43,999 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:43,999 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:43,999 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:43,999 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:44,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 181 places, 110 transitions, 1585 flow [2021-06-10 14:31:44,019 INFO L129 PetriNetUnfolder]: 0/215 cut-off events. [2021-06-10 14:31:44,019 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,019 INFO L84 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 215 events. 0/215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 696 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2021-06-10 14:31:44,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 110 transitions, 1585 flow [2021-06-10 14:31:44,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 108 transitions, 1581 flow [2021-06-10 14:31:44,020 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:44,020 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,020 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,020 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:44,020 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,021 INFO L82 PathProgramCache]: Analyzing trace with hash 67139, now seen corresponding path program 1 times [2021-06-10 14:31:44,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790540202] [2021-06-10 14:31:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:44,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:44,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:44,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790540202] [2021-06-10 14:31:44,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:44,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:44,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311275720] [2021-06-10 14:31:44,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:44,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:44,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:44,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:44,029 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 110 [2021-06-10 14:31:44,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 108 transitions, 1581 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:44,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 110 [2021-06-10 14:31:44,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:44,044 INFO L129 PetriNetUnfolder]: 0/107 cut-off events. [2021-06-10 14:31:44,044 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,044 INFO L84 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 107 events. 0/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 204 event pairs, 0 based on Foata normal form. 36/143 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2021-06-10 14:31:44,045 INFO L132 encePairwiseOnDemand]: 108/110 looper letters, 0 selfloop transitions, 1 changer transitions 0/107 dead transitions. [2021-06-10 14:31:44,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 107 transitions, 1581 flow [2021-06-10 14:31:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:44,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2021-06-10 14:31:44,045 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9787878787878788 [2021-06-10 14:31:44,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2021-06-10 14:31:44,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2021-06-10 14:31:44,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:44,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2021-06-10 14:31:44,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,047 INFO L185 Difference]: Start difference. First operand has 179 places, 108 transitions, 1581 flow. Second operand 3 states and 323 transitions. [2021-06-10 14:31:44,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 107 transitions, 1581 flow [2021-06-10 14:31:44,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 107 transitions, 391 flow, removed 595 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:44,055 INFO L241 Difference]: Finished difference. Result has 180 places, 107 transitions, 391 flow [2021-06-10 14:31:44,055 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=391, PETRI_PLACES=180, PETRI_TRANSITIONS=107} [2021-06-10 14:31:44,056 INFO L343 CegarLoopForPetriNet]: 179 programPoint places, 1 predicate places. [2021-06-10 14:31:44,056 INFO L480 AbstractCegarLoop]: Abstraction has has 180 places, 107 transitions, 391 flow [2021-06-10 14:31:44,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,056 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,056 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:44,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-06-10 14:31:44,056 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1276847327, now seen corresponding path program 1 times [2021-06-10 14:31:44,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207990447] [2021-06-10 14:31:44,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,061 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,063 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,066 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:44,066 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:44,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-06-10 14:31:44,066 WARN L342 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:44,066 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2021-06-10 14:31:44,091 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:44,091 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:44,092 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:44,092 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:44,092 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:44,092 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:44,092 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:44,092 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:44,092 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:44,092 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:44,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 186 places, 113 transitions, 1666 flow [2021-06-10 14:31:44,112 INFO L129 PetriNetUnfolder]: 0/221 cut-off events. [2021-06-10 14:31:44,112 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 221 events. 0/221 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 731 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2021-06-10 14:31:44,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 113 transitions, 1666 flow [2021-06-10 14:31:44,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 111 transitions, 1662 flow [2021-06-10 14:31:44,113 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:44,113 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,113 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,114 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:44,114 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,114 INFO L82 PathProgramCache]: Analyzing trace with hash 70755, now seen corresponding path program 1 times [2021-06-10 14:31:44,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072742311] [2021-06-10 14:31:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:44,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:44,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:44,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072742311] [2021-06-10 14:31:44,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:44,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:44,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450281321] [2021-06-10 14:31:44,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:44,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:44,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:44,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:44,122 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 113 [2021-06-10 14:31:44,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 111 transitions, 1662 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:44,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 113 [2021-06-10 14:31:44,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:44,138 INFO L129 PetriNetUnfolder]: 0/110 cut-off events. [2021-06-10 14:31:44,138 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 110 events. 0/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 227 event pairs, 0 based on Foata normal form. 37/147 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2021-06-10 14:31:44,139 INFO L132 encePairwiseOnDemand]: 111/113 looper letters, 0 selfloop transitions, 1 changer transitions 0/110 dead transitions. [2021-06-10 14:31:44,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 110 transitions, 1662 flow [2021-06-10 14:31:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:44,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2021-06-10 14:31:44,139 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9793510324483776 [2021-06-10 14:31:44,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2021-06-10 14:31:44,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2021-06-10 14:31:44,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:44,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2021-06-10 14:31:44,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,141 INFO L185 Difference]: Start difference. First operand has 184 places, 111 transitions, 1662 flow. Second operand 3 states and 332 transitions. [2021-06-10 14:31:44,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 110 transitions, 1662 flow [2021-06-10 14:31:44,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 110 transitions, 402 flow, removed 630 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:44,150 INFO L241 Difference]: Finished difference. Result has 185 places, 110 transitions, 402 flow [2021-06-10 14:31:44,150 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=402, PETRI_PLACES=185, PETRI_TRANSITIONS=110} [2021-06-10 14:31:44,150 INFO L343 CegarLoopForPetriNet]: 184 programPoint places, 1 predicate places. [2021-06-10 14:31:44,150 INFO L480 AbstractCegarLoop]: Abstraction has has 185 places, 110 transitions, 402 flow [2021-06-10 14:31:44,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,150 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,150 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:44,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-06-10 14:31:44,150 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1575642526, now seen corresponding path program 1 times [2021-06-10 14:31:44,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165178599] [2021-06-10 14:31:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,156 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,157 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,160 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:44,160 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:44,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-06-10 14:31:44,160 WARN L342 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:44,160 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2021-06-10 14:31:44,187 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:44,187 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:44,187 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:44,187 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:44,187 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:44,187 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:44,187 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:44,187 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:44,187 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:44,187 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:44,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 191 places, 116 transitions, 1749 flow [2021-06-10 14:31:44,208 INFO L129 PetriNetUnfolder]: 0/227 cut-off events. [2021-06-10 14:31:44,208 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 227 events. 0/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 705 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2021-06-10 14:31:44,209 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 116 transitions, 1749 flow [2021-06-10 14:31:44,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 114 transitions, 1745 flow [2021-06-10 14:31:44,210 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:44,210 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,210 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,210 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:44,210 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,210 INFO L82 PathProgramCache]: Analyzing trace with hash 74467, now seen corresponding path program 1 times [2021-06-10 14:31:44,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4516844] [2021-06-10 14:31:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:44,217 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:44,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:44,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4516844] [2021-06-10 14:31:44,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:44,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:44,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587476210] [2021-06-10 14:31:44,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:44,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:44,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:44,220 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 116 [2021-06-10 14:31:44,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 114 transitions, 1745 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:44,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 116 [2021-06-10 14:31:44,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:44,236 INFO L129 PetriNetUnfolder]: 0/113 cut-off events. [2021-06-10 14:31:44,236 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,236 INFO L84 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 113 events. 0/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 213 event pairs, 0 based on Foata normal form. 38/151 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2021-06-10 14:31:44,236 INFO L132 encePairwiseOnDemand]: 114/116 looper letters, 0 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2021-06-10 14:31:44,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 113 transitions, 1745 flow [2021-06-10 14:31:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2021-06-10 14:31:44,237 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9798850574712644 [2021-06-10 14:31:44,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2021-06-10 14:31:44,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2021-06-10 14:31:44,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:44,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2021-06-10 14:31:44,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,238 INFO L185 Difference]: Start difference. First operand has 189 places, 114 transitions, 1745 flow. Second operand 3 states and 341 transitions. [2021-06-10 14:31:44,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 113 transitions, 1745 flow [2021-06-10 14:31:44,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 113 transitions, 413 flow, removed 666 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:44,248 INFO L241 Difference]: Finished difference. Result has 190 places, 113 transitions, 413 flow [2021-06-10 14:31:44,248 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=413, PETRI_PLACES=190, PETRI_TRANSITIONS=113} [2021-06-10 14:31:44,248 INFO L343 CegarLoopForPetriNet]: 189 programPoint places, 1 predicate places. [2021-06-10 14:31:44,248 INFO L480 AbstractCegarLoop]: Abstraction has has 190 places, 113 transitions, 413 flow [2021-06-10 14:31:44,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,248 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,248 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:44,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-06-10 14:31:44,248 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1399722715, now seen corresponding path program 1 times [2021-06-10 14:31:44,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464316647] [2021-06-10 14:31:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,254 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,255 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,259 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:44,259 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:44,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-06-10 14:31:44,259 WARN L342 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:44,259 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2021-06-10 14:31:44,286 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:44,286 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:44,287 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:44,287 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:44,287 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:44,287 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:44,287 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:44,287 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:44,287 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:44,287 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:44,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 196 places, 119 transitions, 1834 flow [2021-06-10 14:31:44,308 INFO L129 PetriNetUnfolder]: 0/233 cut-off events. [2021-06-10 14:31:44,308 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 233 events. 0/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 762 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2021-06-10 14:31:44,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 119 transitions, 1834 flow [2021-06-10 14:31:44,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 117 transitions, 1830 flow [2021-06-10 14:31:44,310 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:44,310 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,310 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,310 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:44,310 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,310 INFO L82 PathProgramCache]: Analyzing trace with hash 78275, now seen corresponding path program 1 times [2021-06-10 14:31:44,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149173510] [2021-06-10 14:31:44,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:44,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:44,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:44,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149173510] [2021-06-10 14:31:44,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:44,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:44,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97131653] [2021-06-10 14:31:44,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:44,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:44,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:44,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:44,319 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 119 [2021-06-10 14:31:44,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 117 transitions, 1830 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:44,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 119 [2021-06-10 14:31:44,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:44,350 INFO L129 PetriNetUnfolder]: 0/116 cut-off events. [2021-06-10 14:31:44,350 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 116 events. 0/116 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 221 event pairs, 0 based on Foata normal form. 39/155 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2021-06-10 14:31:44,351 INFO L132 encePairwiseOnDemand]: 117/119 looper letters, 0 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2021-06-10 14:31:44,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 116 transitions, 1830 flow [2021-06-10 14:31:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:44,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2021-06-10 14:31:44,351 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9803921568627451 [2021-06-10 14:31:44,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2021-06-10 14:31:44,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2021-06-10 14:31:44,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:44,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2021-06-10 14:31:44,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,352 INFO L185 Difference]: Start difference. First operand has 194 places, 117 transitions, 1830 flow. Second operand 3 states and 350 transitions. [2021-06-10 14:31:44,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 116 transitions, 1830 flow [2021-06-10 14:31:44,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 116 transitions, 424 flow, removed 703 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:44,363 INFO L241 Difference]: Finished difference. Result has 195 places, 116 transitions, 424 flow [2021-06-10 14:31:44,363 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=195, PETRI_TRANSITIONS=116} [2021-06-10 14:31:44,363 INFO L343 CegarLoopForPetriNet]: 194 programPoint places, 1 predicate places. [2021-06-10 14:31:44,363 INFO L480 AbstractCegarLoop]: Abstraction has has 195 places, 116 transitions, 424 flow [2021-06-10 14:31:44,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,363 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,363 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:44,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-06-10 14:31:44,363 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2142347809, now seen corresponding path program 1 times [2021-06-10 14:31:44,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740454169] [2021-06-10 14:31:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,369 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,370 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,375 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:44,375 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:44,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-06-10 14:31:44,375 WARN L342 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:44,376 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2021-06-10 14:31:44,403 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:44,404 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:44,404 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:44,404 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:44,404 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:44,405 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:44,405 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:44,405 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:44,405 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:44,405 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:44,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 201 places, 122 transitions, 1921 flow [2021-06-10 14:31:44,427 INFO L129 PetriNetUnfolder]: 0/239 cut-off events. [2021-06-10 14:31:44,427 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 239 events. 0/239 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 781 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2021-06-10 14:31:44,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 122 transitions, 1921 flow [2021-06-10 14:31:44,432 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 120 transitions, 1917 flow [2021-06-10 14:31:44,432 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:44,432 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,432 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,432 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:44,433 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,433 INFO L82 PathProgramCache]: Analyzing trace with hash 82179, now seen corresponding path program 1 times [2021-06-10 14:31:44,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047124800] [2021-06-10 14:31:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:44,440 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:44,440 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:44,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047124800] [2021-06-10 14:31:44,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:44,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:44,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514472174] [2021-06-10 14:31:44,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:44,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:44,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:44,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:44,443 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 122 [2021-06-10 14:31:44,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 120 transitions, 1917 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:44,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 122 [2021-06-10 14:31:44,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:44,460 INFO L129 PetriNetUnfolder]: 0/119 cut-off events. [2021-06-10 14:31:44,461 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1019 conditions, 119 events. 0/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 229 event pairs, 0 based on Foata normal form. 40/159 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2021-06-10 14:31:44,461 INFO L132 encePairwiseOnDemand]: 120/122 looper letters, 0 selfloop transitions, 1 changer transitions 0/119 dead transitions. [2021-06-10 14:31:44,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 119 transitions, 1917 flow [2021-06-10 14:31:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2021-06-10 14:31:44,462 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9808743169398907 [2021-06-10 14:31:44,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2021-06-10 14:31:44,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2021-06-10 14:31:44,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:44,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2021-06-10 14:31:44,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,463 INFO L185 Difference]: Start difference. First operand has 199 places, 120 transitions, 1917 flow. Second operand 3 states and 359 transitions. [2021-06-10 14:31:44,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 119 transitions, 1917 flow [2021-06-10 14:31:44,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 119 transitions, 435 flow, removed 741 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:44,474 INFO L241 Difference]: Finished difference. Result has 200 places, 119 transitions, 435 flow [2021-06-10 14:31:44,474 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=435, PETRI_PLACES=200, PETRI_TRANSITIONS=119} [2021-06-10 14:31:44,474 INFO L343 CegarLoopForPetriNet]: 199 programPoint places, 1 predicate places. [2021-06-10 14:31:44,474 INFO L480 AbstractCegarLoop]: Abstraction has has 200 places, 119 transitions, 435 flow [2021-06-10 14:31:44,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,474 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,474 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:44,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-06-10 14:31:44,475 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,475 INFO L82 PathProgramCache]: Analyzing trace with hash 73147637, now seen corresponding path program 1 times [2021-06-10 14:31:44,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195873771] [2021-06-10 14:31:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,481 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,482 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,486 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:44,486 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:44,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-06-10 14:31:44,486 WARN L342 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:44,486 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2021-06-10 14:31:44,515 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:44,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:44,516 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:44,516 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:44,516 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:44,516 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:44,516 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:44,516 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:44,516 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:44,516 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:44,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 125 transitions, 2010 flow [2021-06-10 14:31:44,539 INFO L129 PetriNetUnfolder]: 0/245 cut-off events. [2021-06-10 14:31:44,539 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 245 events. 0/245 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 786 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2021-06-10 14:31:44,539 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 125 transitions, 2010 flow [2021-06-10 14:31:44,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 123 transitions, 2006 flow [2021-06-10 14:31:44,541 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:44,541 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,541 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,541 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:44,541 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash 86179, now seen corresponding path program 1 times [2021-06-10 14:31:44,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541741605] [2021-06-10 14:31:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:44,548 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:44,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541741605] [2021-06-10 14:31:44,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:44,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:44,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792366486] [2021-06-10 14:31:44,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:44,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:44,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:44,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:44,551 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 125 [2021-06-10 14:31:44,551 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 123 transitions, 2006 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,551 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:44,551 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 125 [2021-06-10 14:31:44,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:44,569 INFO L129 PetriNetUnfolder]: 0/122 cut-off events. [2021-06-10 14:31:44,569 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 122 events. 0/122 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 218 event pairs, 0 based on Foata normal form. 41/163 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2021-06-10 14:31:44,570 INFO L132 encePairwiseOnDemand]: 123/125 looper letters, 0 selfloop transitions, 1 changer transitions 0/122 dead transitions. [2021-06-10 14:31:44,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 122 transitions, 2006 flow [2021-06-10 14:31:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2021-06-10 14:31:44,570 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9813333333333333 [2021-06-10 14:31:44,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2021-06-10 14:31:44,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2021-06-10 14:31:44,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:44,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2021-06-10 14:31:44,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,571 INFO L185 Difference]: Start difference. First operand has 204 places, 123 transitions, 2006 flow. Second operand 3 states and 368 transitions. [2021-06-10 14:31:44,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 122 transitions, 2006 flow [2021-06-10 14:31:44,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 122 transitions, 446 flow, removed 780 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:44,585 INFO L241 Difference]: Finished difference. Result has 205 places, 122 transitions, 446 flow [2021-06-10 14:31:44,585 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=446, PETRI_PLACES=205, PETRI_TRANSITIONS=122} [2021-06-10 14:31:44,585 INFO L343 CegarLoopForPetriNet]: 204 programPoint places, 1 predicate places. [2021-06-10 14:31:44,585 INFO L480 AbstractCegarLoop]: Abstraction has has 205 places, 122 transitions, 446 flow [2021-06-10 14:31:44,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,585 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,585 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:44,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-06-10 14:31:44,586 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1311704092, now seen corresponding path program 1 times [2021-06-10 14:31:44,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748850211] [2021-06-10 14:31:44,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,592 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,594 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,597 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:44,597 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:44,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-06-10 14:31:44,597 WARN L342 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:44,597 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2021-06-10 14:31:44,627 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:44,627 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:44,627 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:44,627 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:44,627 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:44,627 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:44,627 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:44,627 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:44,627 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:44,627 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:44,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 211 places, 128 transitions, 2101 flow [2021-06-10 14:31:44,651 INFO L129 PetriNetUnfolder]: 0/251 cut-off events. [2021-06-10 14:31:44,651 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1236 conditions, 251 events. 0/251 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 802 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2021-06-10 14:31:44,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 128 transitions, 2101 flow [2021-06-10 14:31:44,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 126 transitions, 2097 flow [2021-06-10 14:31:44,653 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:44,653 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,653 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,653 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:44,653 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,653 INFO L82 PathProgramCache]: Analyzing trace with hash 90275, now seen corresponding path program 1 times [2021-06-10 14:31:44,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137011548] [2021-06-10 14:31:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:44,660 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:44,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:44,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137011548] [2021-06-10 14:31:44,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:44,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:44,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448883981] [2021-06-10 14:31:44,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:44,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:44,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:44,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:44,663 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 128 [2021-06-10 14:31:44,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 126 transitions, 2097 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:44,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 128 [2021-06-10 14:31:44,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:44,683 INFO L129 PetriNetUnfolder]: 0/125 cut-off events. [2021-06-10 14:31:44,683 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 125 events. 0/125 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 241 event pairs, 0 based on Foata normal form. 42/167 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2021-06-10 14:31:44,684 INFO L132 encePairwiseOnDemand]: 126/128 looper letters, 0 selfloop transitions, 1 changer transitions 0/125 dead transitions. [2021-06-10 14:31:44,684 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 125 transitions, 2097 flow [2021-06-10 14:31:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2021-06-10 14:31:44,684 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9817708333333334 [2021-06-10 14:31:44,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2021-06-10 14:31:44,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2021-06-10 14:31:44,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:44,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2021-06-10 14:31:44,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,685 INFO L185 Difference]: Start difference. First operand has 209 places, 126 transitions, 2097 flow. Second operand 3 states and 377 transitions. [2021-06-10 14:31:44,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 125 transitions, 2097 flow [2021-06-10 14:31:44,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 125 transitions, 457 flow, removed 820 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:44,703 INFO L241 Difference]: Finished difference. Result has 210 places, 125 transitions, 457 flow [2021-06-10 14:31:44,704 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=457, PETRI_PLACES=210, PETRI_TRANSITIONS=125} [2021-06-10 14:31:44,704 INFO L343 CegarLoopForPetriNet]: 209 programPoint places, 1 predicate places. [2021-06-10 14:31:44,704 INFO L480 AbstractCegarLoop]: Abstraction has has 210 places, 125 transitions, 457 flow [2021-06-10 14:31:44,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,704 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,704 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:44,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-06-10 14:31:44,704 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1607214609, now seen corresponding path program 1 times [2021-06-10 14:31:44,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812540785] [2021-06-10 14:31:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,711 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,713 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,717 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:44,717 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:44,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-06-10 14:31:44,717 WARN L342 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:44,717 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2021-06-10 14:31:44,770 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:44,770 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:44,771 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:44,771 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:44,771 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:44,771 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:44,771 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:44,771 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:44,771 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:44,771 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:44,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 216 places, 131 transitions, 2194 flow [2021-06-10 14:31:44,809 INFO L129 PetriNetUnfolder]: 0/257 cut-off events. [2021-06-10 14:31:44,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1287 conditions, 257 events. 0/257 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 812 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2021-06-10 14:31:44,810 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 131 transitions, 2194 flow [2021-06-10 14:31:44,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 129 transitions, 2190 flow [2021-06-10 14:31:44,811 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:44,811 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,811 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,811 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:44,811 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,811 INFO L82 PathProgramCache]: Analyzing trace with hash 94467, now seen corresponding path program 1 times [2021-06-10 14:31:44,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341156811] [2021-06-10 14:31:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:44,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:44,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:44,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341156811] [2021-06-10 14:31:44,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:44,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:44,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190835332] [2021-06-10 14:31:44,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:44,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:44,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:44,822 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 131 [2021-06-10 14:31:44,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 129 transitions, 2190 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:44,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 131 [2021-06-10 14:31:44,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:44,841 INFO L129 PetriNetUnfolder]: 0/128 cut-off events. [2021-06-10 14:31:44,841 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1160 conditions, 128 events. 0/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 259 event pairs, 0 based on Foata normal form. 43/171 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2021-06-10 14:31:44,842 INFO L132 encePairwiseOnDemand]: 129/131 looper letters, 0 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2021-06-10 14:31:44,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 128 transitions, 2190 flow [2021-06-10 14:31:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2021-06-10 14:31:44,842 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9821882951653944 [2021-06-10 14:31:44,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2021-06-10 14:31:44,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2021-06-10 14:31:44,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:44,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2021-06-10 14:31:44,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,847 INFO L185 Difference]: Start difference. First operand has 214 places, 129 transitions, 2190 flow. Second operand 3 states and 386 transitions. [2021-06-10 14:31:44,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 128 transitions, 2190 flow [2021-06-10 14:31:44,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 128 transitions, 468 flow, removed 861 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:44,864 INFO L241 Difference]: Finished difference. Result has 215 places, 128 transitions, 468 flow [2021-06-10 14:31:44,865 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=468, PETRI_PLACES=215, PETRI_TRANSITIONS=128} [2021-06-10 14:31:44,865 INFO L343 CegarLoopForPetriNet]: 214 programPoint places, 1 predicate places. [2021-06-10 14:31:44,865 INFO L480 AbstractCegarLoop]: Abstraction has has 215 places, 128 transitions, 468 flow [2021-06-10 14:31:44,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,865 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,865 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:44,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-06-10 14:31:44,865 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1479889049, now seen corresponding path program 1 times [2021-06-10 14:31:44,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53257339] [2021-06-10 14:31:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,872 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:44,881 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:44,885 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:44,885 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:44,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-06-10 14:31:44,885 WARN L342 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:44,885 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2021-06-10 14:31:44,921 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:44,921 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:44,922 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:44,922 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:44,922 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:44,922 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:44,922 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:44,922 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:44,922 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:44,922 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:44,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 221 places, 134 transitions, 2289 flow [2021-06-10 14:31:44,949 INFO L129 PetriNetUnfolder]: 0/263 cut-off events. [2021-06-10 14:31:44,949 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 263 events. 0/263 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 860 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2021-06-10 14:31:44,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 134 transitions, 2289 flow [2021-06-10 14:31:44,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 132 transitions, 2285 flow [2021-06-10 14:31:44,951 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:44,951 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,951 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:44,951 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:44,951 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:44,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:44,951 INFO L82 PathProgramCache]: Analyzing trace with hash 98755, now seen corresponding path program 1 times [2021-06-10 14:31:44,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:44,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887923102] [2021-06-10 14:31:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:44,959 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:44,959 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:44,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887923102] [2021-06-10 14:31:44,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:44,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:44,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136205581] [2021-06-10 14:31:44,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:44,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:44,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:44,962 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 134 [2021-06-10 14:31:44,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 132 transitions, 2285 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:44,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 134 [2021-06-10 14:31:44,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:44,983 INFO L129 PetriNetUnfolder]: 0/131 cut-off events. [2021-06-10 14:31:44,984 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:44,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1209 conditions, 131 events. 0/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 246 event pairs, 0 based on Foata normal form. 44/175 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2021-06-10 14:31:44,984 INFO L132 encePairwiseOnDemand]: 132/134 looper letters, 0 selfloop transitions, 1 changer transitions 0/131 dead transitions. [2021-06-10 14:31:44,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 131 transitions, 2285 flow [2021-06-10 14:31:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2021-06-10 14:31:44,985 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9825870646766169 [2021-06-10 14:31:44,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2021-06-10 14:31:44,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2021-06-10 14:31:44,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:44,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2021-06-10 14:31:44,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:44,988 INFO L185 Difference]: Start difference. First operand has 219 places, 132 transitions, 2285 flow. Second operand 3 states and 395 transitions. [2021-06-10 14:31:44,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 131 transitions, 2285 flow [2021-06-10 14:31:45,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 131 transitions, 479 flow, removed 903 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:45,009 INFO L241 Difference]: Finished difference. Result has 220 places, 131 transitions, 479 flow [2021-06-10 14:31:45,010 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=220, PETRI_TRANSITIONS=131} [2021-06-10 14:31:45,011 INFO L343 CegarLoopForPetriNet]: 219 programPoint places, 1 predicate places. [2021-06-10 14:31:45,011 INFO L480 AbstractCegarLoop]: Abstraction has has 220 places, 131 transitions, 479 flow [2021-06-10 14:31:45,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,011 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:45,011 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:45,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-06-10 14:31:45,012 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:45,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:45,012 INFO L82 PathProgramCache]: Analyzing trace with hash -881273863, now seen corresponding path program 1 times [2021-06-10 14:31:45,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:45,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126227449] [2021-06-10 14:31:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:45,020 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:45,022 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:45,026 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:45,026 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:45,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-06-10 14:31:45,026 WARN L342 ceAbstractionStarter]: 43 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:45,026 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 44 thread instances. [2021-06-10 14:31:45,061 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:45,061 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:45,061 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:45,061 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:45,061 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:45,061 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:45,061 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:45,062 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:45,062 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:45,062 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:45,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 226 places, 137 transitions, 2386 flow [2021-06-10 14:31:45,092 INFO L129 PetriNetUnfolder]: 0/269 cut-off events. [2021-06-10 14:31:45,093 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1392 conditions, 269 events. 0/269 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 913 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2021-06-10 14:31:45,093 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 137 transitions, 2386 flow [2021-06-10 14:31:45,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 135 transitions, 2382 flow [2021-06-10 14:31:45,094 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:45,094 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,094 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:45,094 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:45,094 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:45,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:45,095 INFO L82 PathProgramCache]: Analyzing trace with hash 103139, now seen corresponding path program 1 times [2021-06-10 14:31:45,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:45,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437675894] [2021-06-10 14:31:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:45,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:45,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:45,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437675894] [2021-06-10 14:31:45,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:45,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:45,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531910594] [2021-06-10 14:31:45,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:45,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:45,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:45,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:45,107 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 137 [2021-06-10 14:31:45,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 135 transitions, 2382 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:45,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 137 [2021-06-10 14:31:45,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:45,128 INFO L129 PetriNetUnfolder]: 0/134 cut-off events. [2021-06-10 14:31:45,128 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1259 conditions, 134 events. 0/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 235 event pairs, 0 based on Foata normal form. 45/179 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2021-06-10 14:31:45,129 INFO L132 encePairwiseOnDemand]: 135/137 looper letters, 0 selfloop transitions, 1 changer transitions 0/134 dead transitions. [2021-06-10 14:31:45,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 134 transitions, 2382 flow [2021-06-10 14:31:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2021-06-10 14:31:45,129 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9829683698296837 [2021-06-10 14:31:45,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2021-06-10 14:31:45,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2021-06-10 14:31:45,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:45,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2021-06-10 14:31:45,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,130 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,131 INFO L185 Difference]: Start difference. First operand has 224 places, 135 transitions, 2382 flow. Second operand 3 states and 404 transitions. [2021-06-10 14:31:45,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 134 transitions, 2382 flow [2021-06-10 14:31:45,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 134 transitions, 490 flow, removed 946 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:45,152 INFO L241 Difference]: Finished difference. Result has 225 places, 134 transitions, 490 flow [2021-06-10 14:31:45,153 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=490, PETRI_PLACES=225, PETRI_TRANSITIONS=134} [2021-06-10 14:31:45,153 INFO L343 CegarLoopForPetriNet]: 224 programPoint places, 1 predicate places. [2021-06-10 14:31:45,153 INFO L480 AbstractCegarLoop]: Abstraction has has 225 places, 134 transitions, 490 flow [2021-06-10 14:31:45,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,153 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:45,153 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:45,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-06-10 14:31:45,153 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:45,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1502263594, now seen corresponding path program 1 times [2021-06-10 14:31:45,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:45,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493237188] [2021-06-10 14:31:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:45,160 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:45,165 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:45,171 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:45,171 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:45,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-06-10 14:31:45,171 WARN L342 ceAbstractionStarter]: 44 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:45,171 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 45 thread instances. [2021-06-10 14:31:45,207 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:45,207 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:45,208 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:45,208 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:45,208 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:45,208 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:45,208 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:45,208 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:45,208 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:45,208 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:45,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 231 places, 140 transitions, 2485 flow [2021-06-10 14:31:45,259 INFO L129 PetriNetUnfolder]: 0/275 cut-off events. [2021-06-10 14:31:45,259 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1446 conditions, 275 events. 0/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 866 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2021-06-10 14:31:45,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 140 transitions, 2485 flow [2021-06-10 14:31:45,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 138 transitions, 2481 flow [2021-06-10 14:31:45,261 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:45,261 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,261 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:45,261 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:45,261 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:45,261 INFO L82 PathProgramCache]: Analyzing trace with hash 107619, now seen corresponding path program 1 times [2021-06-10 14:31:45,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:45,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419259465] [2021-06-10 14:31:45,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:45,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:45,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:45,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419259465] [2021-06-10 14:31:45,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:45,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:45,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216938307] [2021-06-10 14:31:45,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:45,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:45,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:45,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:45,273 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 140 [2021-06-10 14:31:45,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 138 transitions, 2481 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:45,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 140 [2021-06-10 14:31:45,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:45,299 INFO L129 PetriNetUnfolder]: 0/137 cut-off events. [2021-06-10 14:31:45,299 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1310 conditions, 137 events. 0/137 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 251 event pairs, 0 based on Foata normal form. 46/183 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2021-06-10 14:31:45,300 INFO L132 encePairwiseOnDemand]: 138/140 looper letters, 0 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2021-06-10 14:31:45,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 137 transitions, 2481 flow [2021-06-10 14:31:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2021-06-10 14:31:45,301 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9833333333333333 [2021-06-10 14:31:45,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2021-06-10 14:31:45,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2021-06-10 14:31:45,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:45,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2021-06-10 14:31:45,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,303 INFO L185 Difference]: Start difference. First operand has 229 places, 138 transitions, 2481 flow. Second operand 3 states and 413 transitions. [2021-06-10 14:31:45,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 137 transitions, 2481 flow [2021-06-10 14:31:45,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 137 transitions, 501 flow, removed 990 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:45,327 INFO L241 Difference]: Finished difference. Result has 230 places, 137 transitions, 501 flow [2021-06-10 14:31:45,327 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=501, PETRI_PLACES=230, PETRI_TRANSITIONS=137} [2021-06-10 14:31:45,327 INFO L343 CegarLoopForPetriNet]: 229 programPoint places, 1 predicate places. [2021-06-10 14:31:45,327 INFO L480 AbstractCegarLoop]: Abstraction has has 230 places, 137 transitions, 501 flow [2021-06-10 14:31:45,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,327 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:45,327 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:45,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-06-10 14:31:45,328 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash 832000557, now seen corresponding path program 1 times [2021-06-10 14:31:45,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:45,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378700587] [2021-06-10 14:31:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:45,335 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:45,336 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:45,343 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:45,343 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:45,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-06-10 14:31:45,343 WARN L342 ceAbstractionStarter]: 45 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:45,343 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 46 thread instances. [2021-06-10 14:31:45,383 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:45,383 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:45,384 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:45,384 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:45,384 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:45,384 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:45,384 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:45,384 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:45,384 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:45,384 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:45,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 236 places, 143 transitions, 2586 flow [2021-06-10 14:31:45,427 INFO L129 PetriNetUnfolder]: 0/281 cut-off events. [2021-06-10 14:31:45,427 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1501 conditions, 281 events. 0/281 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 937 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2021-06-10 14:31:45,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 143 transitions, 2586 flow [2021-06-10 14:31:45,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 141 transitions, 2582 flow [2021-06-10 14:31:45,429 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:45,429 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,429 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:45,429 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:45,429 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:45,430 INFO L82 PathProgramCache]: Analyzing trace with hash 112195, now seen corresponding path program 1 times [2021-06-10 14:31:45,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:45,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332178752] [2021-06-10 14:31:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:45,439 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:45,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:45,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332178752] [2021-06-10 14:31:45,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:45,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:45,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401367398] [2021-06-10 14:31:45,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:45,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:45,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:45,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:45,442 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 143 [2021-06-10 14:31:45,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 141 transitions, 2582 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:45,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 143 [2021-06-10 14:31:45,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:45,471 INFO L129 PetriNetUnfolder]: 0/140 cut-off events. [2021-06-10 14:31:45,471 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 140 events. 0/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 276 event pairs, 0 based on Foata normal form. 47/187 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2021-06-10 14:31:45,472 INFO L132 encePairwiseOnDemand]: 141/143 looper letters, 0 selfloop transitions, 1 changer transitions 0/140 dead transitions. [2021-06-10 14:31:45,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 140 transitions, 2582 flow [2021-06-10 14:31:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2021-06-10 14:31:45,472 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9836829836829837 [2021-06-10 14:31:45,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2021-06-10 14:31:45,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2021-06-10 14:31:45,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:45,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2021-06-10 14:31:45,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,474 INFO L185 Difference]: Start difference. First operand has 234 places, 141 transitions, 2582 flow. Second operand 3 states and 422 transitions. [2021-06-10 14:31:45,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 140 transitions, 2582 flow [2021-06-10 14:31:45,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 140 transitions, 512 flow, removed 1035 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:45,503 INFO L241 Difference]: Finished difference. Result has 235 places, 140 transitions, 512 flow [2021-06-10 14:31:45,503 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=512, PETRI_PLACES=235, PETRI_TRANSITIONS=140} [2021-06-10 14:31:45,504 INFO L343 CegarLoopForPetriNet]: 234 programPoint places, 1 predicate places. [2021-06-10 14:31:45,504 INFO L480 AbstractCegarLoop]: Abstraction has has 235 places, 140 transitions, 512 flow [2021-06-10 14:31:45,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,504 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:45,504 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:45,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-06-10 14:31:45,504 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:45,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:45,504 INFO L82 PathProgramCache]: Analyzing trace with hash -522791507, now seen corresponding path program 1 times [2021-06-10 14:31:45,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:45,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333202754] [2021-06-10 14:31:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:45,512 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:45,513 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:45,517 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:45,517 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:45,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-06-10 14:31:45,518 WARN L342 ceAbstractionStarter]: 46 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:45,518 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 47 thread instances. [2021-06-10 14:31:45,558 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:45,559 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:45,559 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:45,559 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:45,559 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:45,559 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:45,559 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:45,559 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:45,559 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:45,559 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:45,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 241 places, 146 transitions, 2689 flow [2021-06-10 14:31:45,597 INFO L129 PetriNetUnfolder]: 0/287 cut-off events. [2021-06-10 14:31:45,598 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 287 events. 0/287 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 907 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2021-06-10 14:31:45,598 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 146 transitions, 2689 flow [2021-06-10 14:31:45,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 144 transitions, 2685 flow [2021-06-10 14:31:45,599 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:45,599 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,599 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:45,599 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:45,600 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:45,600 INFO L82 PathProgramCache]: Analyzing trace with hash 116867, now seen corresponding path program 1 times [2021-06-10 14:31:45,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:45,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312735982] [2021-06-10 14:31:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:45,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:45,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:45,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312735982] [2021-06-10 14:31:45,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:45,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:45,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005787415] [2021-06-10 14:31:45,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:45,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:45,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:45,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:45,620 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 146 [2021-06-10 14:31:45,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 144 transitions, 2685 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:45,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 146 [2021-06-10 14:31:45,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:45,644 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2021-06-10 14:31:45,645 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 143 events. 0/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 269 event pairs, 0 based on Foata normal form. 48/191 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2021-06-10 14:31:45,645 INFO L132 encePairwiseOnDemand]: 144/146 looper letters, 0 selfloop transitions, 1 changer transitions 0/143 dead transitions. [2021-06-10 14:31:45,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 143 transitions, 2685 flow [2021-06-10 14:31:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2021-06-10 14:31:45,646 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9840182648401826 [2021-06-10 14:31:45,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2021-06-10 14:31:45,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2021-06-10 14:31:45,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:45,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2021-06-10 14:31:45,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,647 INFO L185 Difference]: Start difference. First operand has 239 places, 144 transitions, 2685 flow. Second operand 3 states and 431 transitions. [2021-06-10 14:31:45,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 143 transitions, 2685 flow [2021-06-10 14:31:45,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 143 transitions, 523 flow, removed 1081 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:45,670 INFO L241 Difference]: Finished difference. Result has 240 places, 143 transitions, 523 flow [2021-06-10 14:31:45,670 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=523, PETRI_PLACES=240, PETRI_TRANSITIONS=143} [2021-06-10 14:31:45,670 INFO L343 CegarLoopForPetriNet]: 239 programPoint places, 1 predicate places. [2021-06-10 14:31:45,670 INFO L480 AbstractCegarLoop]: Abstraction has has 240 places, 143 transitions, 523 flow [2021-06-10 14:31:45,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,676 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:45,676 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:45,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-06-10 14:31:45,676 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:45,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:45,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1233847341, now seen corresponding path program 1 times [2021-06-10 14:31:45,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:45,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397622699] [2021-06-10 14:31:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:45,683 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:45,684 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:45,688 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:45,688 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:45,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-06-10 14:31:45,688 WARN L342 ceAbstractionStarter]: 47 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:45,688 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 48 thread instances. [2021-06-10 14:31:45,726 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:45,726 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:45,727 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:45,727 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:45,727 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:45,727 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:45,727 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:45,727 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:45,727 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:45,727 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:45,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 246 places, 149 transitions, 2794 flow [2021-06-10 14:31:45,776 INFO L129 PetriNetUnfolder]: 0/293 cut-off events. [2021-06-10 14:31:45,776 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 293 events. 0/293 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 948 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 0. Up to 49 conditions per place. [2021-06-10 14:31:45,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 149 transitions, 2794 flow [2021-06-10 14:31:45,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 147 transitions, 2790 flow [2021-06-10 14:31:45,778 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:45,778 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,778 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:45,778 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:45,778 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:45,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:45,779 INFO L82 PathProgramCache]: Analyzing trace with hash 121635, now seen corresponding path program 1 times [2021-06-10 14:31:45,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:45,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338804169] [2021-06-10 14:31:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:45,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:45,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:45,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338804169] [2021-06-10 14:31:45,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:45,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:45,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925794201] [2021-06-10 14:31:45,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:45,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:45,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:45,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:45,801 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 149 [2021-06-10 14:31:45,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 147 transitions, 2790 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:45,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 149 [2021-06-10 14:31:45,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:45,826 INFO L129 PetriNetUnfolder]: 0/146 cut-off events. [2021-06-10 14:31:45,826 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1469 conditions, 146 events. 0/146 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 267 event pairs, 0 based on Foata normal form. 49/195 useless extension candidates. Maximal degree in co-relation 0. Up to 49 conditions per place. [2021-06-10 14:31:45,827 INFO L132 encePairwiseOnDemand]: 147/149 looper letters, 0 selfloop transitions, 1 changer transitions 0/146 dead transitions. [2021-06-10 14:31:45,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 146 transitions, 2790 flow [2021-06-10 14:31:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:45,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2021-06-10 14:31:45,828 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9843400447427293 [2021-06-10 14:31:45,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2021-06-10 14:31:45,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2021-06-10 14:31:45,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:45,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2021-06-10 14:31:45,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,830 INFO L185 Difference]: Start difference. First operand has 244 places, 147 transitions, 2790 flow. Second operand 3 states and 440 transitions. [2021-06-10 14:31:45,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 146 transitions, 2790 flow [2021-06-10 14:31:45,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 146 transitions, 534 flow, removed 1128 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:45,855 INFO L241 Difference]: Finished difference. Result has 245 places, 146 transitions, 534 flow [2021-06-10 14:31:45,855 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=534, PETRI_PLACES=245, PETRI_TRANSITIONS=146} [2021-06-10 14:31:45,855 INFO L343 CegarLoopForPetriNet]: 244 programPoint places, 1 predicate places. [2021-06-10 14:31:45,855 INFO L480 AbstractCegarLoop]: Abstraction has has 245 places, 146 transitions, 534 flow [2021-06-10 14:31:45,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,855 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:45,855 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:45,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-06-10 14:31:45,855 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1665236624, now seen corresponding path program 1 times [2021-06-10 14:31:45,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:45,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761842087] [2021-06-10 14:31:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:45,865 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:45,866 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:45,870 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:45,870 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:45,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-06-10 14:31:45,870 WARN L342 ceAbstractionStarter]: 48 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:45,870 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 49 thread instances. [2021-06-10 14:31:45,903 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:45,903 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:45,904 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:45,904 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:45,904 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:45,904 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:45,904 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:45,904 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:45,904 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:45,904 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:45,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 251 places, 152 transitions, 2901 flow [2021-06-10 14:31:45,960 INFO L129 PetriNetUnfolder]: 0/299 cut-off events. [2021-06-10 14:31:45,961 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 299 events. 0/299 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1001 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2021-06-10 14:31:45,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 152 transitions, 2901 flow [2021-06-10 14:31:45,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 249 places, 150 transitions, 2897 flow [2021-06-10 14:31:45,962 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:45,962 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:45,962 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:45,963 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:45,963 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:45,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:45,963 INFO L82 PathProgramCache]: Analyzing trace with hash 126499, now seen corresponding path program 1 times [2021-06-10 14:31:45,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:45,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23875695] [2021-06-10 14:31:45,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:45,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:45,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:45,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23875695] [2021-06-10 14:31:45,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:45,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:45,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324091104] [2021-06-10 14:31:45,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:45,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:45,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:45,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:45,974 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 152 [2021-06-10 14:31:45,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 150 transitions, 2897 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:45,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:45,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 152 [2021-06-10 14:31:45,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:46,000 INFO L129 PetriNetUnfolder]: 0/149 cut-off events. [2021-06-10 14:31:46,000 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1524 conditions, 149 events. 0/149 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 297 event pairs, 0 based on Foata normal form. 50/199 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2021-06-10 14:31:46,001 INFO L132 encePairwiseOnDemand]: 150/152 looper letters, 0 selfloop transitions, 1 changer transitions 0/149 dead transitions. [2021-06-10 14:31:46,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 149 transitions, 2897 flow [2021-06-10 14:31:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2021-06-10 14:31:46,001 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9846491228070176 [2021-06-10 14:31:46,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2021-06-10 14:31:46,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2021-06-10 14:31:46,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:46,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2021-06-10 14:31:46,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,003 INFO L185 Difference]: Start difference. First operand has 249 places, 150 transitions, 2897 flow. Second operand 3 states and 449 transitions. [2021-06-10 14:31:46,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 149 transitions, 2897 flow [2021-06-10 14:31:46,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 149 transitions, 545 flow, removed 1176 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:46,025 INFO L241 Difference]: Finished difference. Result has 250 places, 149 transitions, 545 flow [2021-06-10 14:31:46,025 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=545, PETRI_PLACES=250, PETRI_TRANSITIONS=149} [2021-06-10 14:31:46,026 INFO L343 CegarLoopForPetriNet]: 249 programPoint places, 1 predicate places. [2021-06-10 14:31:46,026 INFO L480 AbstractCegarLoop]: Abstraction has has 250 places, 149 transitions, 545 flow [2021-06-10 14:31:46,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,026 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:46,026 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:46,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-06-10 14:31:46,026 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:46,026 INFO L82 PathProgramCache]: Analyzing trace with hash -2123002503, now seen corresponding path program 1 times [2021-06-10 14:31:46,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:46,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492730649] [2021-06-10 14:31:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:46,034 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:46,035 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:46,039 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:46,039 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:46,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-06-10 14:31:46,040 WARN L342 ceAbstractionStarter]: 49 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:46,040 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 50 thread instances. [2021-06-10 14:31:46,072 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:46,073 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:46,073 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:46,073 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:46,073 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:46,073 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:46,073 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:46,073 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:46,073 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:46,073 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:46,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 256 places, 155 transitions, 3010 flow [2021-06-10 14:31:46,109 INFO L129 PetriNetUnfolder]: 0/305 cut-off events. [2021-06-10 14:31:46,109 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 305 events. 0/305 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 978 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2021-06-10 14:31:46,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 155 transitions, 3010 flow [2021-06-10 14:31:46,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 153 transitions, 3006 flow [2021-06-10 14:31:46,111 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:46,111 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,111 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:46,111 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:46,111 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:46,111 INFO L82 PathProgramCache]: Analyzing trace with hash 131459, now seen corresponding path program 1 times [2021-06-10 14:31:46,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:46,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283106898] [2021-06-10 14:31:46,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:46,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:46,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:46,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283106898] [2021-06-10 14:31:46,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:46,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:46,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001343573] [2021-06-10 14:31:46,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:46,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:46,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:46,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:46,123 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 155 [2021-06-10 14:31:46,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 153 transitions, 3006 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:46,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 155 [2021-06-10 14:31:46,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:46,150 INFO L129 PetriNetUnfolder]: 0/152 cut-off events. [2021-06-10 14:31:46,150 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1580 conditions, 152 events. 0/152 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 275 event pairs, 0 based on Foata normal form. 51/203 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2021-06-10 14:31:46,151 INFO L132 encePairwiseOnDemand]: 153/155 looper letters, 0 selfloop transitions, 1 changer transitions 0/152 dead transitions. [2021-06-10 14:31:46,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 152 transitions, 3006 flow [2021-06-10 14:31:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:46,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2021-06-10 14:31:46,152 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9849462365591398 [2021-06-10 14:31:46,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2021-06-10 14:31:46,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2021-06-10 14:31:46,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:46,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2021-06-10 14:31:46,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,153 INFO L185 Difference]: Start difference. First operand has 254 places, 153 transitions, 3006 flow. Second operand 3 states and 458 transitions. [2021-06-10 14:31:46,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 152 transitions, 3006 flow [2021-06-10 14:31:46,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 152 transitions, 556 flow, removed 1225 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:46,177 INFO L241 Difference]: Finished difference. Result has 255 places, 152 transitions, 556 flow [2021-06-10 14:31:46,177 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=556, PETRI_PLACES=255, PETRI_TRANSITIONS=152} [2021-06-10 14:31:46,177 INFO L343 CegarLoopForPetriNet]: 254 programPoint places, 1 predicate places. [2021-06-10 14:31:46,177 INFO L480 AbstractCegarLoop]: Abstraction has has 255 places, 152 transitions, 556 flow [2021-06-10 14:31:46,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,177 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:46,177 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:46,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-06-10 14:31:46,177 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:46,177 INFO L82 PathProgramCache]: Analyzing trace with hash 453703923, now seen corresponding path program 1 times [2021-06-10 14:31:46,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:46,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679006196] [2021-06-10 14:31:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:46,186 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:46,187 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:46,191 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:46,191 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:46,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-06-10 14:31:46,192 WARN L342 ceAbstractionStarter]: 50 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:46,192 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 51 thread instances. [2021-06-10 14:31:46,249 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:46,249 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:46,249 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:46,249 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:46,249 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:46,249 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:46,249 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:46,249 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:46,250 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:46,250 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:46,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 261 places, 158 transitions, 3121 flow [2021-06-10 14:31:46,287 INFO L129 PetriNetUnfolder]: 0/311 cut-off events. [2021-06-10 14:31:46,287 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1791 conditions, 311 events. 0/311 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1045 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 0. Up to 52 conditions per place. [2021-06-10 14:31:46,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 158 transitions, 3121 flow [2021-06-10 14:31:46,289 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 156 transitions, 3117 flow [2021-06-10 14:31:46,289 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:46,289 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,289 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:46,289 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:46,289 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:46,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:46,289 INFO L82 PathProgramCache]: Analyzing trace with hash 136515, now seen corresponding path program 1 times [2021-06-10 14:31:46,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:46,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855575369] [2021-06-10 14:31:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:46,298 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:46,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:46,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855575369] [2021-06-10 14:31:46,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:46,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:46,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102011714] [2021-06-10 14:31:46,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:46,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:46,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:46,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:46,301 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 158 [2021-06-10 14:31:46,301 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 156 transitions, 3117 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,301 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:46,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 158 [2021-06-10 14:31:46,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:46,329 INFO L129 PetriNetUnfolder]: 0/155 cut-off events. [2021-06-10 14:31:46,329 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1637 conditions, 155 events. 0/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 301 event pairs, 0 based on Foata normal form. 52/207 useless extension candidates. Maximal degree in co-relation 0. Up to 52 conditions per place. [2021-06-10 14:31:46,330 INFO L132 encePairwiseOnDemand]: 156/158 looper letters, 0 selfloop transitions, 1 changer transitions 0/155 dead transitions. [2021-06-10 14:31:46,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 155 transitions, 3117 flow [2021-06-10 14:31:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2021-06-10 14:31:46,330 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9852320675105485 [2021-06-10 14:31:46,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2021-06-10 14:31:46,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2021-06-10 14:31:46,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:46,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2021-06-10 14:31:46,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,332 INFO L185 Difference]: Start difference. First operand has 259 places, 156 transitions, 3117 flow. Second operand 3 states and 467 transitions. [2021-06-10 14:31:46,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 155 transitions, 3117 flow [2021-06-10 14:31:46,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 155 transitions, 567 flow, removed 1275 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:46,360 INFO L241 Difference]: Finished difference. Result has 260 places, 155 transitions, 567 flow [2021-06-10 14:31:46,360 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=567, PETRI_PLACES=260, PETRI_TRANSITIONS=155} [2021-06-10 14:31:46,360 INFO L343 CegarLoopForPetriNet]: 259 programPoint places, 1 predicate places. [2021-06-10 14:31:46,360 INFO L480 AbstractCegarLoop]: Abstraction has has 260 places, 155 transitions, 567 flow [2021-06-10 14:31:46,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,360 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:46,360 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:46,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-06-10 14:31:46,360 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:46,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1640419729, now seen corresponding path program 1 times [2021-06-10 14:31:46,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:46,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331676486] [2021-06-10 14:31:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:46,370 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:46,371 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:46,375 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:46,375 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:46,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-06-10 14:31:46,376 WARN L342 ceAbstractionStarter]: 51 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:46,376 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 52 thread instances. [2021-06-10 14:31:46,411 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:46,412 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:46,412 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:46,412 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:46,412 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:46,412 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:46,412 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:46,412 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:46,412 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:46,412 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:46,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 266 places, 161 transitions, 3234 flow [2021-06-10 14:31:46,452 INFO L129 PetriNetUnfolder]: 0/317 cut-off events. [2021-06-10 14:31:46,453 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 317 events. 0/317 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1047 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 0. Up to 53 conditions per place. [2021-06-10 14:31:46,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 161 transitions, 3234 flow [2021-06-10 14:31:46,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 159 transitions, 3230 flow [2021-06-10 14:31:46,455 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:46,455 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,455 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:46,455 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:46,455 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash 141667, now seen corresponding path program 1 times [2021-06-10 14:31:46,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:46,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895427142] [2021-06-10 14:31:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:46,471 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:46,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:46,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895427142] [2021-06-10 14:31:46,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:46,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:46,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750042576] [2021-06-10 14:31:46,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:46,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:46,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:46,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:46,475 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 161 [2021-06-10 14:31:46,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 159 transitions, 3230 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:46,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 161 [2021-06-10 14:31:46,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:46,537 INFO L129 PetriNetUnfolder]: 0/158 cut-off events. [2021-06-10 14:31:46,537 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1695 conditions, 158 events. 0/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 352 event pairs, 0 based on Foata normal form. 53/211 useless extension candidates. Maximal degree in co-relation 0. Up to 53 conditions per place. [2021-06-10 14:31:46,538 INFO L132 encePairwiseOnDemand]: 159/161 looper letters, 0 selfloop transitions, 1 changer transitions 0/158 dead transitions. [2021-06-10 14:31:46,538 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 158 transitions, 3230 flow [2021-06-10 14:31:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2021-06-10 14:31:46,539 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9855072463768116 [2021-06-10 14:31:46,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2021-06-10 14:31:46,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2021-06-10 14:31:46,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:46,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2021-06-10 14:31:46,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,541 INFO L185 Difference]: Start difference. First operand has 264 places, 159 transitions, 3230 flow. Second operand 3 states and 476 transitions. [2021-06-10 14:31:46,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 158 transitions, 3230 flow [2021-06-10 14:31:46,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 158 transitions, 578 flow, removed 1326 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:46,570 INFO L241 Difference]: Finished difference. Result has 265 places, 158 transitions, 578 flow [2021-06-10 14:31:46,570 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=578, PETRI_PLACES=265, PETRI_TRANSITIONS=158} [2021-06-10 14:31:46,570 INFO L343 CegarLoopForPetriNet]: 264 programPoint places, 1 predicate places. [2021-06-10 14:31:46,570 INFO L480 AbstractCegarLoop]: Abstraction has has 265 places, 158 transitions, 578 flow [2021-06-10 14:31:46,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,570 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:46,570 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:46,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-06-10 14:31:46,570 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:46,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1202665654, now seen corresponding path program 1 times [2021-06-10 14:31:46,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:46,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770127601] [2021-06-10 14:31:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:46,578 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:46,580 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:46,584 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:46,584 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:46,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-06-10 14:31:46,584 WARN L342 ceAbstractionStarter]: 52 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:46,584 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 53 thread instances. [2021-06-10 14:31:46,622 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:46,622 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:46,622 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:46,622 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:46,622 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:46,623 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:46,623 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:46,623 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:46,623 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:46,623 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:46,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 271 places, 164 transitions, 3349 flow [2021-06-10 14:31:46,666 INFO L129 PetriNetUnfolder]: 0/323 cut-off events. [2021-06-10 14:31:46,666 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1914 conditions, 323 events. 0/323 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1029 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2021-06-10 14:31:46,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 164 transitions, 3349 flow [2021-06-10 14:31:46,667 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 162 transitions, 3345 flow [2021-06-10 14:31:46,668 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:46,668 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,668 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:46,668 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:46,668 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash 146915, now seen corresponding path program 1 times [2021-06-10 14:31:46,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:46,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707095211] [2021-06-10 14:31:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:46,677 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:46,677 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:46,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707095211] [2021-06-10 14:31:46,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:46,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:46,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971896884] [2021-06-10 14:31:46,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:46,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:46,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:46,680 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 164 [2021-06-10 14:31:46,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 162 transitions, 3345 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:46,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 164 [2021-06-10 14:31:46,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:46,711 INFO L129 PetriNetUnfolder]: 0/161 cut-off events. [2021-06-10 14:31:46,712 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 161 events. 0/161 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 304 event pairs, 0 based on Foata normal form. 54/215 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2021-06-10 14:31:46,712 INFO L132 encePairwiseOnDemand]: 162/164 looper letters, 0 selfloop transitions, 1 changer transitions 0/161 dead transitions. [2021-06-10 14:31:46,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 161 transitions, 3345 flow [2021-06-10 14:31:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2021-06-10 14:31:46,713 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9857723577235772 [2021-06-10 14:31:46,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2021-06-10 14:31:46,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2021-06-10 14:31:46,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:46,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2021-06-10 14:31:46,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,714 INFO L185 Difference]: Start difference. First operand has 269 places, 162 transitions, 3345 flow. Second operand 3 states and 485 transitions. [2021-06-10 14:31:46,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 161 transitions, 3345 flow [2021-06-10 14:31:46,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 161 transitions, 589 flow, removed 1378 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:46,745 INFO L241 Difference]: Finished difference. Result has 270 places, 161 transitions, 589 flow [2021-06-10 14:31:46,746 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=589, PETRI_PLACES=270, PETRI_TRANSITIONS=161} [2021-06-10 14:31:46,746 INFO L343 CegarLoopForPetriNet]: 269 programPoint places, 1 predicate places. [2021-06-10 14:31:46,746 INFO L480 AbstractCegarLoop]: Abstraction has has 270 places, 161 transitions, 589 flow [2021-06-10 14:31:46,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,746 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:46,746 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:46,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-06-10 14:31:46,746 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:46,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:46,746 INFO L82 PathProgramCache]: Analyzing trace with hash -355666955, now seen corresponding path program 1 times [2021-06-10 14:31:46,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:46,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244949048] [2021-06-10 14:31:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:46,755 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:46,756 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:46,761 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:46,761 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:46,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-06-10 14:31:46,761 WARN L342 ceAbstractionStarter]: 53 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:46,761 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 54 thread instances. [2021-06-10 14:31:46,800 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:46,800 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:46,801 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:46,801 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:46,801 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:46,801 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:46,801 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:46,801 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:46,801 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:46,801 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:46,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 276 places, 167 transitions, 3466 flow [2021-06-10 14:31:46,850 INFO L129 PetriNetUnfolder]: 0/329 cut-off events. [2021-06-10 14:31:46,850 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1977 conditions, 329 events. 0/329 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1100 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2021-06-10 14:31:46,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 167 transitions, 3466 flow [2021-06-10 14:31:46,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 274 places, 165 transitions, 3462 flow [2021-06-10 14:31:46,852 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:46,852 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,852 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:46,852 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:46,852 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:46,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:46,852 INFO L82 PathProgramCache]: Analyzing trace with hash 152259, now seen corresponding path program 1 times [2021-06-10 14:31:46,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:46,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184188291] [2021-06-10 14:31:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:46,862 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:46,862 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:46,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184188291] [2021-06-10 14:31:46,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:46,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:46,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200988360] [2021-06-10 14:31:46,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:46,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:46,866 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 167 [2021-06-10 14:31:46,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 165 transitions, 3462 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:46,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 167 [2021-06-10 14:31:46,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:46,901 INFO L129 PetriNetUnfolder]: 0/164 cut-off events. [2021-06-10 14:31:46,901 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:46,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 164 events. 0/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 324 event pairs, 0 based on Foata normal form. 55/219 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2021-06-10 14:31:46,901 INFO L132 encePairwiseOnDemand]: 165/167 looper letters, 0 selfloop transitions, 1 changer transitions 0/164 dead transitions. [2021-06-10 14:31:46,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 164 transitions, 3462 flow [2021-06-10 14:31:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2021-06-10 14:31:46,902 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9860279441117764 [2021-06-10 14:31:46,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2021-06-10 14:31:46,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2021-06-10 14:31:46,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:46,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2021-06-10 14:31:46,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,903 INFO L185 Difference]: Start difference. First operand has 274 places, 165 transitions, 3462 flow. Second operand 3 states and 494 transitions. [2021-06-10 14:31:46,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 164 transitions, 3462 flow [2021-06-10 14:31:46,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 164 transitions, 600 flow, removed 1431 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:46,939 INFO L241 Difference]: Finished difference. Result has 275 places, 164 transitions, 600 flow [2021-06-10 14:31:46,939 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=600, PETRI_PLACES=275, PETRI_TRANSITIONS=164} [2021-06-10 14:31:46,939 INFO L343 CegarLoopForPetriNet]: 274 programPoint places, 1 predicate places. [2021-06-10 14:31:46,939 INFO L480 AbstractCegarLoop]: Abstraction has has 275 places, 164 transitions, 600 flow [2021-06-10 14:31:46,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:46,939 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:46,939 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:46,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-06-10 14:31:46,940 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:46,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:46,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1647836473, now seen corresponding path program 1 times [2021-06-10 14:31:46,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:46,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697397953] [2021-06-10 14:31:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:46,949 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:46,954 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:46,959 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:46,959 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:46,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-06-10 14:31:46,960 WARN L342 ceAbstractionStarter]: 54 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:46,960 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 55 thread instances. [2021-06-10 14:31:47,001 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:47,002 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:47,002 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:47,002 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:47,002 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:47,002 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:47,002 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:47,002 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:47,002 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:47,002 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:47,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 281 places, 170 transitions, 3585 flow [2021-06-10 14:31:47,050 INFO L129 PetriNetUnfolder]: 0/335 cut-off events. [2021-06-10 14:31:47,050 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,050 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2041 conditions, 335 events. 0/335 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1104 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2021-06-10 14:31:47,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 170 transitions, 3585 flow [2021-06-10 14:31:47,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 279 places, 168 transitions, 3581 flow [2021-06-10 14:31:47,052 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:47,052 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,052 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:47,052 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:47,052 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:47,053 INFO L82 PathProgramCache]: Analyzing trace with hash 157699, now seen corresponding path program 1 times [2021-06-10 14:31:47,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:47,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283635053] [2021-06-10 14:31:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:47,062 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:47,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:47,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283635053] [2021-06-10 14:31:47,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:47,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:47,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074127433] [2021-06-10 14:31:47,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:47,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:47,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:47,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:47,066 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 170 [2021-06-10 14:31:47,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 168 transitions, 3581 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:47,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 170 [2021-06-10 14:31:47,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:47,131 INFO L129 PetriNetUnfolder]: 0/167 cut-off events. [2021-06-10 14:31:47,131 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1875 conditions, 167 events. 0/167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 315 event pairs, 0 based on Foata normal form. 56/223 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2021-06-10 14:31:47,132 INFO L132 encePairwiseOnDemand]: 168/170 looper letters, 0 selfloop transitions, 1 changer transitions 0/167 dead transitions. [2021-06-10 14:31:47,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 167 transitions, 3581 flow [2021-06-10 14:31:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2021-06-10 14:31:47,132 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9862745098039216 [2021-06-10 14:31:47,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2021-06-10 14:31:47,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2021-06-10 14:31:47,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:47,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2021-06-10 14:31:47,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,134 INFO L185 Difference]: Start difference. First operand has 279 places, 168 transitions, 3581 flow. Second operand 3 states and 503 transitions. [2021-06-10 14:31:47,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 167 transitions, 3581 flow [2021-06-10 14:31:47,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 167 transitions, 611 flow, removed 1485 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:47,167 INFO L241 Difference]: Finished difference. Result has 280 places, 167 transitions, 611 flow [2021-06-10 14:31:47,167 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=611, PETRI_PLACES=280, PETRI_TRANSITIONS=167} [2021-06-10 14:31:47,167 INFO L343 CegarLoopForPetriNet]: 279 programPoint places, 1 predicate places. [2021-06-10 14:31:47,167 INFO L480 AbstractCegarLoop]: Abstraction has has 280 places, 167 transitions, 611 flow [2021-06-10 14:31:47,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,168 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:47,168 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:47,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-06-10 14:31:47,168 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:47,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:47,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1816418341, now seen corresponding path program 1 times [2021-06-10 14:31:47,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:47,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738987290] [2021-06-10 14:31:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:47,180 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:47,182 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:47,188 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:47,188 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:47,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-06-10 14:31:47,188 WARN L342 ceAbstractionStarter]: 55 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:47,188 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 56 thread instances. [2021-06-10 14:31:47,231 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:47,232 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:47,232 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:47,232 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:47,232 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:47,232 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:47,232 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:47,232 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:47,232 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:47,232 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:47,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 286 places, 173 transitions, 3706 flow [2021-06-10 14:31:47,282 INFO L129 PetriNetUnfolder]: 0/341 cut-off events. [2021-06-10 14:31:47,282 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 341 events. 0/341 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1077 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 0. Up to 57 conditions per place. [2021-06-10 14:31:47,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 286 places, 173 transitions, 3706 flow [2021-06-10 14:31:47,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 284 places, 171 transitions, 3702 flow [2021-06-10 14:31:47,284 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:47,284 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,285 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:47,285 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:47,285 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:47,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:47,285 INFO L82 PathProgramCache]: Analyzing trace with hash 163235, now seen corresponding path program 1 times [2021-06-10 14:31:47,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:47,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290925428] [2021-06-10 14:31:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:47,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:47,295 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:47,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290925428] [2021-06-10 14:31:47,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:47,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:47,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384178731] [2021-06-10 14:31:47,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:47,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:47,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:47,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:47,298 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 173 [2021-06-10 14:31:47,298 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 171 transitions, 3702 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,298 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:47,298 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 173 [2021-06-10 14:31:47,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:47,336 INFO L129 PetriNetUnfolder]: 0/170 cut-off events. [2021-06-10 14:31:47,336 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 170 events. 0/170 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 316 event pairs, 0 based on Foata normal form. 57/227 useless extension candidates. Maximal degree in co-relation 0. Up to 57 conditions per place. [2021-06-10 14:31:47,336 INFO L132 encePairwiseOnDemand]: 171/173 looper letters, 0 selfloop transitions, 1 changer transitions 0/170 dead transitions. [2021-06-10 14:31:47,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 170 transitions, 3702 flow [2021-06-10 14:31:47,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2021-06-10 14:31:47,337 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9865125240847784 [2021-06-10 14:31:47,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2021-06-10 14:31:47,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2021-06-10 14:31:47,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:47,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2021-06-10 14:31:47,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,339 INFO L185 Difference]: Start difference. First operand has 284 places, 171 transitions, 3702 flow. Second operand 3 states and 512 transitions. [2021-06-10 14:31:47,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 170 transitions, 3702 flow [2021-06-10 14:31:47,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 170 transitions, 622 flow, removed 1540 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:47,374 INFO L241 Difference]: Finished difference. Result has 285 places, 170 transitions, 622 flow [2021-06-10 14:31:47,374 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=622, PETRI_PLACES=285, PETRI_TRANSITIONS=170} [2021-06-10 14:31:47,374 INFO L343 CegarLoopForPetriNet]: 284 programPoint places, 1 predicate places. [2021-06-10 14:31:47,374 INFO L480 AbstractCegarLoop]: Abstraction has has 285 places, 170 transitions, 622 flow [2021-06-10 14:31:47,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,375 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:47,375 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:47,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-06-10 14:31:47,375 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:47,375 INFO L82 PathProgramCache]: Analyzing trace with hash 960217852, now seen corresponding path program 1 times [2021-06-10 14:31:47,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:47,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443808678] [2021-06-10 14:31:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:47,386 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:47,387 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:47,393 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:47,393 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:47,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-06-10 14:31:47,394 WARN L342 ceAbstractionStarter]: 56 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:47,394 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 57 thread instances. [2021-06-10 14:31:47,437 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:47,437 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:47,438 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:47,438 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:47,438 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:47,438 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:47,438 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:47,438 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:47,438 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:47,438 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:47,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 291 places, 176 transitions, 3829 flow [2021-06-10 14:31:47,490 INFO L129 PetriNetUnfolder]: 0/347 cut-off events. [2021-06-10 14:31:47,490 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2172 conditions, 347 events. 0/347 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1106 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2021-06-10 14:31:47,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 176 transitions, 3829 flow [2021-06-10 14:31:47,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 174 transitions, 3825 flow [2021-06-10 14:31:47,493 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:47,493 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,493 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:47,493 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:47,493 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:47,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:47,493 INFO L82 PathProgramCache]: Analyzing trace with hash 168867, now seen corresponding path program 1 times [2021-06-10 14:31:47,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:47,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295655723] [2021-06-10 14:31:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:47,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:47,504 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:47,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295655723] [2021-06-10 14:31:47,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:47,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:47,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692013755] [2021-06-10 14:31:47,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:47,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:47,507 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 176 [2021-06-10 14:31:47,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 174 transitions, 3825 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:47,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 176 [2021-06-10 14:31:47,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:47,543 INFO L129 PetriNetUnfolder]: 0/173 cut-off events. [2021-06-10 14:31:47,544 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 173 events. 0/173 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 336 event pairs, 0 based on Foata normal form. 58/231 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2021-06-10 14:31:47,544 INFO L132 encePairwiseOnDemand]: 174/176 looper letters, 0 selfloop transitions, 1 changer transitions 0/173 dead transitions. [2021-06-10 14:31:47,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 173 transitions, 3825 flow [2021-06-10 14:31:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:47,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2021-06-10 14:31:47,545 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9867424242424242 [2021-06-10 14:31:47,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2021-06-10 14:31:47,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2021-06-10 14:31:47,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:47,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2021-06-10 14:31:47,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,546 INFO L185 Difference]: Start difference. First operand has 289 places, 174 transitions, 3825 flow. Second operand 3 states and 521 transitions. [2021-06-10 14:31:47,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 173 transitions, 3825 flow [2021-06-10 14:31:47,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 173 transitions, 633 flow, removed 1596 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:47,585 INFO L241 Difference]: Finished difference. Result has 290 places, 173 transitions, 633 flow [2021-06-10 14:31:47,586 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=633, PETRI_PLACES=290, PETRI_TRANSITIONS=173} [2021-06-10 14:31:47,586 INFO L343 CegarLoopForPetriNet]: 289 programPoint places, 1 predicate places. [2021-06-10 14:31:47,586 INFO L480 AbstractCegarLoop]: Abstraction has has 290 places, 173 transitions, 633 flow [2021-06-10 14:31:47,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,586 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:47,586 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:47,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-06-10 14:31:47,586 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:47,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1458020769, now seen corresponding path program 1 times [2021-06-10 14:31:47,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:47,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318244742] [2021-06-10 14:31:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:47,596 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:47,598 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:47,604 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:47,604 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:47,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-06-10 14:31:47,604 WARN L342 ceAbstractionStarter]: 57 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:47,604 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 58 thread instances. [2021-06-10 14:31:47,649 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:47,650 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:47,650 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:47,650 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:47,650 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:47,650 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:47,650 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:47,650 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:47,650 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:47,650 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:47,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 296 places, 179 transitions, 3954 flow [2021-06-10 14:31:47,727 INFO L129 PetriNetUnfolder]: 0/353 cut-off events. [2021-06-10 14:31:47,727 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 353 events. 0/353 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1144 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2021-06-10 14:31:47,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 296 places, 179 transitions, 3954 flow [2021-06-10 14:31:47,729 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 177 transitions, 3950 flow [2021-06-10 14:31:47,730 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:47,730 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,730 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:47,730 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:47,730 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:47,730 INFO L82 PathProgramCache]: Analyzing trace with hash 174595, now seen corresponding path program 1 times [2021-06-10 14:31:47,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:47,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770358634] [2021-06-10 14:31:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:47,741 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:47,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:47,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770358634] [2021-06-10 14:31:47,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:47,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:47,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953619355] [2021-06-10 14:31:47,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:47,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:47,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:47,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:47,744 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 179 [2021-06-10 14:31:47,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 177 transitions, 3950 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:47,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 179 [2021-06-10 14:31:47,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:47,793 INFO L129 PetriNetUnfolder]: 0/176 cut-off events. [2021-06-10 14:31:47,793 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 176 events. 0/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 314 event pairs, 0 based on Foata normal form. 59/235 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2021-06-10 14:31:47,793 INFO L132 encePairwiseOnDemand]: 177/179 looper letters, 0 selfloop transitions, 1 changer transitions 0/176 dead transitions. [2021-06-10 14:31:47,793 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 176 transitions, 3950 flow [2021-06-10 14:31:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2021-06-10 14:31:47,794 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9869646182495344 [2021-06-10 14:31:47,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2021-06-10 14:31:47,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2021-06-10 14:31:47,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:47,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2021-06-10 14:31:47,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,796 INFO L185 Difference]: Start difference. First operand has 294 places, 177 transitions, 3950 flow. Second operand 3 states and 530 transitions. [2021-06-10 14:31:47,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 176 transitions, 3950 flow [2021-06-10 14:31:47,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 176 transitions, 644 flow, removed 1653 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:47,842 INFO L241 Difference]: Finished difference. Result has 295 places, 176 transitions, 644 flow [2021-06-10 14:31:47,842 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=644, PETRI_PLACES=295, PETRI_TRANSITIONS=176} [2021-06-10 14:31:47,842 INFO L343 CegarLoopForPetriNet]: 294 programPoint places, 1 predicate places. [2021-06-10 14:31:47,842 INFO L480 AbstractCegarLoop]: Abstraction has has 295 places, 176 transitions, 644 flow [2021-06-10 14:31:47,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,843 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:47,843 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:47,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-06-10 14:31:47,843 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:47,843 INFO L82 PathProgramCache]: Analyzing trace with hash 734709375, now seen corresponding path program 1 times [2021-06-10 14:31:47,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:47,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326043760] [2021-06-10 14:31:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:47,854 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:47,856 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:47,863 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:47,864 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:47,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-06-10 14:31:47,864 WARN L342 ceAbstractionStarter]: 58 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:47,864 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 59 thread instances. [2021-06-10 14:31:47,908 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:47,908 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:47,908 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:47,908 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:47,909 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:47,909 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:47,909 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:47,909 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:47,909 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:47,909 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:47,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 301 places, 182 transitions, 4081 flow [2021-06-10 14:31:47,970 INFO L129 PetriNetUnfolder]: 0/359 cut-off events. [2021-06-10 14:31:47,970 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2307 conditions, 359 events. 0/359 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1189 event pairs, 0 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2021-06-10 14:31:47,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 301 places, 182 transitions, 4081 flow [2021-06-10 14:31:47,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 180 transitions, 4077 flow [2021-06-10 14:31:47,973 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:47,973 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:47,973 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:47,973 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:47,973 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash 180419, now seen corresponding path program 1 times [2021-06-10 14:31:47,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:47,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457243552] [2021-06-10 14:31:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:47,985 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:47,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:47,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457243552] [2021-06-10 14:31:47,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:47,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:47,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352848510] [2021-06-10 14:31:47,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:47,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:47,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:47,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:47,989 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 182 [2021-06-10 14:31:47,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 180 transitions, 4077 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:47,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:47,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 182 [2021-06-10 14:31:47,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:48,042 INFO L129 PetriNetUnfolder]: 0/179 cut-off events. [2021-06-10 14:31:48,042 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:48,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2129 conditions, 179 events. 0/179 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 334 event pairs, 0 based on Foata normal form. 60/239 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2021-06-10 14:31:48,043 INFO L132 encePairwiseOnDemand]: 180/182 looper letters, 0 selfloop transitions, 1 changer transitions 0/179 dead transitions. [2021-06-10 14:31:48,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 179 transitions, 4077 flow [2021-06-10 14:31:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2021-06-10 14:31:48,045 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9871794871794872 [2021-06-10 14:31:48,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2021-06-10 14:31:48,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2021-06-10 14:31:48,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:48,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2021-06-10 14:31:48,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,047 INFO L185 Difference]: Start difference. First operand has 299 places, 180 transitions, 4077 flow. Second operand 3 states and 539 transitions. [2021-06-10 14:31:48,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 179 transitions, 4077 flow [2021-06-10 14:31:48,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 179 transitions, 655 flow, removed 1711 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:48,096 INFO L241 Difference]: Finished difference. Result has 300 places, 179 transitions, 655 flow [2021-06-10 14:31:48,096 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=655, PETRI_PLACES=300, PETRI_TRANSITIONS=179} [2021-06-10 14:31:48,096 INFO L343 CegarLoopForPetriNet]: 299 programPoint places, 1 predicate places. [2021-06-10 14:31:48,096 INFO L480 AbstractCegarLoop]: Abstraction has has 300 places, 179 transitions, 655 flow [2021-06-10 14:31:48,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,096 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:48,097 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:48,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-06-10 14:31:48,097 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:48,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2013285399, now seen corresponding path program 1 times [2021-06-10 14:31:48,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:48,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789597526] [2021-06-10 14:31:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:48,109 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:48,110 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:48,118 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:48,118 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:48,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-06-10 14:31:48,118 WARN L342 ceAbstractionStarter]: 59 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:48,118 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 60 thread instances. [2021-06-10 14:31:48,163 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:48,163 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:48,164 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:48,164 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:48,164 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:48,164 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:48,164 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:48,164 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:48,164 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:48,164 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:48,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 306 places, 185 transitions, 4210 flow [2021-06-10 14:31:48,227 INFO L129 PetriNetUnfolder]: 0/365 cut-off events. [2021-06-10 14:31:48,228 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:48,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 365 events. 0/365 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1222 event pairs, 0 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 0. Up to 61 conditions per place. [2021-06-10 14:31:48,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 306 places, 185 transitions, 4210 flow [2021-06-10 14:31:48,230 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 183 transitions, 4206 flow [2021-06-10 14:31:48,230 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:48,230 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:48,231 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:48,231 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:48,231 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:48,231 INFO L82 PathProgramCache]: Analyzing trace with hash 186339, now seen corresponding path program 1 times [2021-06-10 14:31:48,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:48,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423952149] [2021-06-10 14:31:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:48,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:48,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:48,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423952149] [2021-06-10 14:31:48,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:48,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:48,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645528322] [2021-06-10 14:31:48,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:48,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:48,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:48,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:48,246 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 185 [2021-06-10 14:31:48,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 183 transitions, 4206 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:48,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 185 [2021-06-10 14:31:48,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:48,294 INFO L129 PetriNetUnfolder]: 0/182 cut-off events. [2021-06-10 14:31:48,294 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:48,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2195 conditions, 182 events. 0/182 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 343 event pairs, 0 based on Foata normal form. 61/243 useless extension candidates. Maximal degree in co-relation 0. Up to 61 conditions per place. [2021-06-10 14:31:48,295 INFO L132 encePairwiseOnDemand]: 183/185 looper letters, 0 selfloop transitions, 1 changer transitions 0/182 dead transitions. [2021-06-10 14:31:48,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 182 transitions, 4206 flow [2021-06-10 14:31:48,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2021-06-10 14:31:48,298 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9873873873873874 [2021-06-10 14:31:48,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2021-06-10 14:31:48,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2021-06-10 14:31:48,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:48,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2021-06-10 14:31:48,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,299 INFO L185 Difference]: Start difference. First operand has 304 places, 183 transitions, 4206 flow. Second operand 3 states and 548 transitions. [2021-06-10 14:31:48,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 182 transitions, 4206 flow [2021-06-10 14:31:48,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 182 transitions, 666 flow, removed 1770 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:48,346 INFO L241 Difference]: Finished difference. Result has 305 places, 182 transitions, 666 flow [2021-06-10 14:31:48,346 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=666, PETRI_PLACES=305, PETRI_TRANSITIONS=182} [2021-06-10 14:31:48,347 INFO L343 CegarLoopForPetriNet]: 304 programPoint places, 1 predicate places. [2021-06-10 14:31:48,347 INFO L480 AbstractCegarLoop]: Abstraction has has 305 places, 182 transitions, 666 flow [2021-06-10 14:31:48,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,347 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:48,348 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:48,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-06-10 14:31:48,348 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1893663810, now seen corresponding path program 1 times [2021-06-10 14:31:48,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:48,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805493112] [2021-06-10 14:31:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:48,359 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:48,361 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:48,367 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:48,367 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:48,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-06-10 14:31:48,367 WARN L342 ceAbstractionStarter]: 60 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:48,367 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 61 thread instances. [2021-06-10 14:31:48,417 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:48,417 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:48,418 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:48,418 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:48,418 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:48,418 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:48,418 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:48,418 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:48,418 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:48,418 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:48,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 311 places, 188 transitions, 4341 flow [2021-06-10 14:31:48,473 INFO L129 PetriNetUnfolder]: 0/371 cut-off events. [2021-06-10 14:31:48,473 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:48,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2446 conditions, 371 events. 0/371 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1193 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2021-06-10 14:31:48,473 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 188 transitions, 4341 flow [2021-06-10 14:31:48,475 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 309 places, 186 transitions, 4337 flow [2021-06-10 14:31:48,476 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:48,476 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:48,476 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:48,476 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:48,476 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:48,476 INFO L82 PathProgramCache]: Analyzing trace with hash 192355, now seen corresponding path program 1 times [2021-06-10 14:31:48,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:48,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761078901] [2021-06-10 14:31:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:48,488 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:48,488 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:48,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761078901] [2021-06-10 14:31:48,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:48,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:48,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821437411] [2021-06-10 14:31:48,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:48,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:48,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:48,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:48,491 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 188 [2021-06-10 14:31:48,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 186 transitions, 4337 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:48,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 188 [2021-06-10 14:31:48,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:48,533 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2021-06-10 14:31:48,533 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:48,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 185 events. 0/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 392 event pairs, 0 based on Foata normal form. 62/247 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2021-06-10 14:31:48,534 INFO L132 encePairwiseOnDemand]: 186/188 looper letters, 0 selfloop transitions, 1 changer transitions 0/185 dead transitions. [2021-06-10 14:31:48,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 185 transitions, 4337 flow [2021-06-10 14:31:48,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2021-06-10 14:31:48,535 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9875886524822695 [2021-06-10 14:31:48,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2021-06-10 14:31:48,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2021-06-10 14:31:48,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:48,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2021-06-10 14:31:48,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,536 INFO L185 Difference]: Start difference. First operand has 309 places, 186 transitions, 4337 flow. Second operand 3 states and 557 transitions. [2021-06-10 14:31:48,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 185 transitions, 4337 flow [2021-06-10 14:31:48,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 185 transitions, 677 flow, removed 1830 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:48,588 INFO L241 Difference]: Finished difference. Result has 310 places, 185 transitions, 677 flow [2021-06-10 14:31:48,588 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=677, PETRI_PLACES=310, PETRI_TRANSITIONS=185} [2021-06-10 14:31:48,588 INFO L343 CegarLoopForPetriNet]: 309 programPoint places, 1 predicate places. [2021-06-10 14:31:48,588 INFO L480 AbstractCegarLoop]: Abstraction has has 310 places, 185 transitions, 677 flow [2021-06-10 14:31:48,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,589 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:48,589 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:48,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-06-10 14:31:48,589 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:48,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1896631683, now seen corresponding path program 1 times [2021-06-10 14:31:48,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:48,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246281034] [2021-06-10 14:31:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:48,600 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:48,603 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:48,610 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:48,611 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:48,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-06-10 14:31:48,611 WARN L342 ceAbstractionStarter]: 61 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:48,611 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 62 thread instances. [2021-06-10 14:31:48,659 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:48,659 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:48,660 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:48,660 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:48,660 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:48,660 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:48,660 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:48,660 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:48,660 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:48,660 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:48,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 316 places, 191 transitions, 4474 flow [2021-06-10 14:31:48,757 INFO L129 PetriNetUnfolder]: 0/377 cut-off events. [2021-06-10 14:31:48,757 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:48,757 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 377 events. 0/377 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1260 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2021-06-10 14:31:48,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 316 places, 191 transitions, 4474 flow [2021-06-10 14:31:48,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 314 places, 189 transitions, 4470 flow [2021-06-10 14:31:48,759 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:48,759 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:48,759 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:48,759 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:48,760 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:48,760 INFO L82 PathProgramCache]: Analyzing trace with hash 198467, now seen corresponding path program 1 times [2021-06-10 14:31:48,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:48,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277594501] [2021-06-10 14:31:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:48,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:48,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:48,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277594501] [2021-06-10 14:31:48,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:48,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:48,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503268946] [2021-06-10 14:31:48,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:48,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:48,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:48,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:48,773 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 191 [2021-06-10 14:31:48,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 189 transitions, 4470 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:48,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 191 [2021-06-10 14:31:48,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:48,816 INFO L129 PetriNetUnfolder]: 0/188 cut-off events. [2021-06-10 14:31:48,816 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:48,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2330 conditions, 188 events. 0/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 386 event pairs, 0 based on Foata normal form. 63/251 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2021-06-10 14:31:48,817 INFO L132 encePairwiseOnDemand]: 189/191 looper letters, 0 selfloop transitions, 1 changer transitions 0/188 dead transitions. [2021-06-10 14:31:48,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 188 transitions, 4470 flow [2021-06-10 14:31:48,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2021-06-10 14:31:48,818 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.987783595113438 [2021-06-10 14:31:48,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2021-06-10 14:31:48,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2021-06-10 14:31:48,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:48,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2021-06-10 14:31:48,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,819 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,819 INFO L185 Difference]: Start difference. First operand has 314 places, 189 transitions, 4470 flow. Second operand 3 states and 566 transitions. [2021-06-10 14:31:48,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 188 transitions, 4470 flow [2021-06-10 14:31:48,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 188 transitions, 688 flow, removed 1891 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:48,877 INFO L241 Difference]: Finished difference. Result has 315 places, 188 transitions, 688 flow [2021-06-10 14:31:48,877 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=688, PETRI_PLACES=315, PETRI_TRANSITIONS=188} [2021-06-10 14:31:48,877 INFO L343 CegarLoopForPetriNet]: 314 programPoint places, 1 predicate places. [2021-06-10 14:31:48,877 INFO L480 AbstractCegarLoop]: Abstraction has has 315 places, 188 transitions, 688 flow [2021-06-10 14:31:48,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:48,877 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:48,877 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:48,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-06-10 14:31:48,877 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:48,878 INFO L82 PathProgramCache]: Analyzing trace with hash 617363653, now seen corresponding path program 1 times [2021-06-10 14:31:48,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:48,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584807975] [2021-06-10 14:31:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:48,888 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:48,891 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:48,900 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:48,900 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:48,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-06-10 14:31:48,901 WARN L342 ceAbstractionStarter]: 62 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:48,901 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 63 thread instances. [2021-06-10 14:31:48,941 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:48,941 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:48,942 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:48,942 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:48,942 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:48,942 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:48,942 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:48,942 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:48,942 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:48,942 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:48,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 321 places, 194 transitions, 4609 flow [2021-06-10 14:31:49,001 INFO L129 PetriNetUnfolder]: 0/383 cut-off events. [2021-06-10 14:31:49,001 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:49,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2589 conditions, 383 events. 0/383 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1404 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2021-06-10 14:31:49,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 194 transitions, 4609 flow [2021-06-10 14:31:49,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 319 places, 192 transitions, 4605 flow [2021-06-10 14:31:49,003 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:49,003 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:49,003 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:49,003 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:49,004 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:49,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:49,004 INFO L82 PathProgramCache]: Analyzing trace with hash 204675, now seen corresponding path program 1 times [2021-06-10 14:31:49,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:49,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803802176] [2021-06-10 14:31:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:49,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:49,015 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:49,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803802176] [2021-06-10 14:31:49,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:49,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:49,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107954770] [2021-06-10 14:31:49,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:49,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:49,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:49,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:49,017 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 194 [2021-06-10 14:31:49,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 192 transitions, 4605 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:49,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 194 [2021-06-10 14:31:49,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:49,066 INFO L129 PetriNetUnfolder]: 0/191 cut-off events. [2021-06-10 14:31:49,066 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:49,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2399 conditions, 191 events. 0/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 374 event pairs, 0 based on Foata normal form. 64/255 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2021-06-10 14:31:49,066 INFO L132 encePairwiseOnDemand]: 192/194 looper letters, 0 selfloop transitions, 1 changer transitions 0/191 dead transitions. [2021-06-10 14:31:49,067 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 191 transitions, 4605 flow [2021-06-10 14:31:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2021-06-10 14:31:49,067 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9879725085910653 [2021-06-10 14:31:49,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2021-06-10 14:31:49,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2021-06-10 14:31:49,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:49,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2021-06-10 14:31:49,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,069 INFO L185 Difference]: Start difference. First operand has 319 places, 192 transitions, 4605 flow. Second operand 3 states and 575 transitions. [2021-06-10 14:31:49,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 191 transitions, 4605 flow [2021-06-10 14:31:49,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 191 transitions, 699 flow, removed 1953 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:49,132 INFO L241 Difference]: Finished difference. Result has 320 places, 191 transitions, 699 flow [2021-06-10 14:31:49,132 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=699, PETRI_PLACES=320, PETRI_TRANSITIONS=191} [2021-06-10 14:31:49,133 INFO L343 CegarLoopForPetriNet]: 319 programPoint places, 1 predicate places. [2021-06-10 14:31:49,133 INFO L480 AbstractCegarLoop]: Abstraction has has 320 places, 191 transitions, 699 flow [2021-06-10 14:31:49,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,133 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:49,133 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:49,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-06-10 14:31:49,133 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:49,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1826160861, now seen corresponding path program 1 times [2021-06-10 14:31:49,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:49,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280705637] [2021-06-10 14:31:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:49,145 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:49,150 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:49,157 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:49,157 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:49,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-06-10 14:31:49,157 WARN L342 ceAbstractionStarter]: 63 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:49,157 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 64 thread instances. [2021-06-10 14:31:49,206 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:49,207 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:49,207 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:49,207 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:49,207 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:49,207 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:49,207 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:49,207 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:49,208 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:49,208 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:49,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 326 places, 197 transitions, 4746 flow [2021-06-10 14:31:49,268 INFO L129 PetriNetUnfolder]: 0/389 cut-off events. [2021-06-10 14:31:49,268 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:49,268 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2662 conditions, 389 events. 0/389 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1407 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 0. Up to 65 conditions per place. [2021-06-10 14:31:49,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 197 transitions, 4746 flow [2021-06-10 14:31:49,270 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 195 transitions, 4742 flow [2021-06-10 14:31:49,270 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:49,271 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:49,271 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:49,271 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:49,271 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:49,271 INFO L82 PathProgramCache]: Analyzing trace with hash 210979, now seen corresponding path program 1 times [2021-06-10 14:31:49,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:49,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831093602] [2021-06-10 14:31:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:49,282 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:49,283 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:49,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831093602] [2021-06-10 14:31:49,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:49,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:49,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254055782] [2021-06-10 14:31:49,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:49,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:49,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:49,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:49,286 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 197 [2021-06-10 14:31:49,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 195 transitions, 4742 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:49,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 197 [2021-06-10 14:31:49,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:49,332 INFO L129 PetriNetUnfolder]: 0/194 cut-off events. [2021-06-10 14:31:49,332 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:49,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2469 conditions, 194 events. 0/194 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 424 event pairs, 0 based on Foata normal form. 65/259 useless extension candidates. Maximal degree in co-relation 0. Up to 65 conditions per place. [2021-06-10 14:31:49,333 INFO L132 encePairwiseOnDemand]: 195/197 looper letters, 0 selfloop transitions, 1 changer transitions 0/194 dead transitions. [2021-06-10 14:31:49,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 194 transitions, 4742 flow [2021-06-10 14:31:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:49,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2021-06-10 14:31:49,333 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.988155668358714 [2021-06-10 14:31:49,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2021-06-10 14:31:49,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2021-06-10 14:31:49,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:49,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2021-06-10 14:31:49,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,335 INFO L185 Difference]: Start difference. First operand has 324 places, 195 transitions, 4742 flow. Second operand 3 states and 584 transitions. [2021-06-10 14:31:49,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 194 transitions, 4742 flow [2021-06-10 14:31:49,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 194 transitions, 710 flow, removed 2016 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:49,404 INFO L241 Difference]: Finished difference. Result has 325 places, 194 transitions, 710 flow [2021-06-10 14:31:49,405 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=325, PETRI_TRANSITIONS=194} [2021-06-10 14:31:49,405 INFO L343 CegarLoopForPetriNet]: 324 programPoint places, 1 predicate places. [2021-06-10 14:31:49,405 INFO L480 AbstractCegarLoop]: Abstraction has has 325 places, 194 transitions, 710 flow [2021-06-10 14:31:49,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,405 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:49,405 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:49,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-06-10 14:31:49,406 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:49,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:49,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1666195320, now seen corresponding path program 1 times [2021-06-10 14:31:49,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:49,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481612109] [2021-06-10 14:31:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:49,427 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:49,430 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:49,438 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:49,438 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:49,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-06-10 14:31:49,439 WARN L342 ceAbstractionStarter]: 64 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:49,439 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 65 thread instances. [2021-06-10 14:31:49,489 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:49,489 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:49,489 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:49,489 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:49,489 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:49,489 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:49,489 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:49,489 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:49,489 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:49,489 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:49,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 331 places, 200 transitions, 4885 flow [2021-06-10 14:31:49,552 INFO L129 PetriNetUnfolder]: 0/395 cut-off events. [2021-06-10 14:31:49,552 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:49,552 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2736 conditions, 395 events. 0/395 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1470 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2021-06-10 14:31:49,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 200 transitions, 4885 flow [2021-06-10 14:31:49,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 329 places, 198 transitions, 4881 flow [2021-06-10 14:31:49,555 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:49,555 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:49,555 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:49,555 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:49,555 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:49,555 INFO L82 PathProgramCache]: Analyzing trace with hash 217379, now seen corresponding path program 1 times [2021-06-10 14:31:49,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:49,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997259271] [2021-06-10 14:31:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:49,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:49,567 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:49,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997259271] [2021-06-10 14:31:49,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:49,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:49,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111160807] [2021-06-10 14:31:49,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:49,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:49,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:49,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:49,570 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 200 [2021-06-10 14:31:49,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 198 transitions, 4881 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:49,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 200 [2021-06-10 14:31:49,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:49,642 INFO L129 PetriNetUnfolder]: 0/197 cut-off events. [2021-06-10 14:31:49,642 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:49,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2540 conditions, 197 events. 0/197 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 383 event pairs, 0 based on Foata normal form. 66/263 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2021-06-10 14:31:49,642 INFO L132 encePairwiseOnDemand]: 198/200 looper letters, 0 selfloop transitions, 1 changer transitions 0/197 dead transitions. [2021-06-10 14:31:49,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 197 transitions, 4881 flow [2021-06-10 14:31:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2021-06-10 14:31:49,643 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9883333333333333 [2021-06-10 14:31:49,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2021-06-10 14:31:49,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2021-06-10 14:31:49,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:49,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2021-06-10 14:31:49,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,645 INFO L185 Difference]: Start difference. First operand has 329 places, 198 transitions, 4881 flow. Second operand 3 states and 593 transitions. [2021-06-10 14:31:49,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 197 transitions, 4881 flow [2021-06-10 14:31:49,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 197 transitions, 721 flow, removed 2080 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:49,713 INFO L241 Difference]: Finished difference. Result has 330 places, 197 transitions, 721 flow [2021-06-10 14:31:49,714 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=721, PETRI_PLACES=330, PETRI_TRANSITIONS=197} [2021-06-10 14:31:49,714 INFO L343 CegarLoopForPetriNet]: 329 programPoint places, 1 predicate places. [2021-06-10 14:31:49,714 INFO L480 AbstractCegarLoop]: Abstraction has has 330 places, 197 transitions, 721 flow [2021-06-10 14:31:49,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,714 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:49,714 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:49,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-06-10 14:31:49,714 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:49,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1308836489, now seen corresponding path program 1 times [2021-06-10 14:31:49,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:49,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378745018] [2021-06-10 14:31:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:49,725 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:49,727 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:49,734 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:49,734 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:49,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-06-10 14:31:49,734 WARN L342 ceAbstractionStarter]: 65 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:49,734 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 66 thread instances. [2021-06-10 14:31:49,784 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:49,784 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:49,784 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:49,784 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:49,784 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:49,784 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:49,784 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:49,784 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:49,784 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:49,785 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:49,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 336 places, 203 transitions, 5026 flow [2021-06-10 14:31:49,849 INFO L129 PetriNetUnfolder]: 0/401 cut-off events. [2021-06-10 14:31:49,849 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:49,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2811 conditions, 401 events. 0/401 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1504 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2021-06-10 14:31:49,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 203 transitions, 5026 flow [2021-06-10 14:31:49,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 201 transitions, 5022 flow [2021-06-10 14:31:49,851 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:49,851 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:49,851 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:49,852 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:49,852 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:49,852 INFO L82 PathProgramCache]: Analyzing trace with hash 223875, now seen corresponding path program 1 times [2021-06-10 14:31:49,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:49,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481183170] [2021-06-10 14:31:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:49,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:49,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:49,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481183170] [2021-06-10 14:31:49,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:49,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:49,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369098859] [2021-06-10 14:31:49,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:49,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:49,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:49,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:49,867 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 203 [2021-06-10 14:31:49,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 201 transitions, 5022 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:49,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 203 [2021-06-10 14:31:49,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:49,916 INFO L129 PetriNetUnfolder]: 0/200 cut-off events. [2021-06-10 14:31:49,917 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:49,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2612 conditions, 200 events. 0/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 430 event pairs, 0 based on Foata normal form. 67/267 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2021-06-10 14:31:49,917 INFO L132 encePairwiseOnDemand]: 201/203 looper letters, 0 selfloop transitions, 1 changer transitions 0/200 dead transitions. [2021-06-10 14:31:49,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 200 transitions, 5022 flow [2021-06-10 14:31:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:49,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2021-06-10 14:31:49,918 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9885057471264368 [2021-06-10 14:31:49,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2021-06-10 14:31:49,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2021-06-10 14:31:49,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:49,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2021-06-10 14:31:49,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,919 INFO L185 Difference]: Start difference. First operand has 334 places, 201 transitions, 5022 flow. Second operand 3 states and 602 transitions. [2021-06-10 14:31:49,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 200 transitions, 5022 flow [2021-06-10 14:31:49,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 200 transitions, 732 flow, removed 2145 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:49,990 INFO L241 Difference]: Finished difference. Result has 335 places, 200 transitions, 732 flow [2021-06-10 14:31:49,991 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=732, PETRI_PLACES=335, PETRI_TRANSITIONS=200} [2021-06-10 14:31:49,991 INFO L343 CegarLoopForPetriNet]: 334 programPoint places, 1 predicate places. [2021-06-10 14:31:49,991 INFO L480 AbstractCegarLoop]: Abstraction has has 335 places, 200 transitions, 732 flow [2021-06-10 14:31:49,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:49,991 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:49,991 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:49,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-06-10 14:31:49,991 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:49,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:49,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2145466379, now seen corresponding path program 1 times [2021-06-10 14:31:49,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:49,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233765188] [2021-06-10 14:31:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:50,003 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:50,004 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:50,012 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:50,012 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:50,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-06-10 14:31:50,012 WARN L342 ceAbstractionStarter]: 66 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:50,012 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 67 thread instances. [2021-06-10 14:31:50,064 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:50,064 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:50,064 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:50,064 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:50,064 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:50,064 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:50,064 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:50,064 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:50,065 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:50,065 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:50,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 341 places, 206 transitions, 5169 flow [2021-06-10 14:31:50,131 INFO L129 PetriNetUnfolder]: 0/407 cut-off events. [2021-06-10 14:31:50,131 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:50,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2887 conditions, 407 events. 0/407 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1495 event pairs, 0 based on Foata normal form. 0/339 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2021-06-10 14:31:50,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 341 places, 206 transitions, 5169 flow [2021-06-10 14:31:50,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 339 places, 204 transitions, 5165 flow [2021-06-10 14:31:50,134 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:50,134 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:50,134 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:50,134 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:50,134 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:50,134 INFO L82 PathProgramCache]: Analyzing trace with hash 230467, now seen corresponding path program 1 times [2021-06-10 14:31:50,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:50,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794874610] [2021-06-10 14:31:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:50,145 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:50,146 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:50,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794874610] [2021-06-10 14:31:50,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:50,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:50,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301088562] [2021-06-10 14:31:50,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:50,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:50,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:50,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:50,148 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 206 [2021-06-10 14:31:50,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 204 transitions, 5165 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:50,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 206 [2021-06-10 14:31:50,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:50,199 INFO L129 PetriNetUnfolder]: 0/203 cut-off events. [2021-06-10 14:31:50,199 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:50,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 203 events. 0/203 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 397 event pairs, 0 based on Foata normal form. 68/271 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2021-06-10 14:31:50,200 INFO L132 encePairwiseOnDemand]: 204/206 looper letters, 0 selfloop transitions, 1 changer transitions 0/203 dead transitions. [2021-06-10 14:31:50,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 203 transitions, 5165 flow [2021-06-10 14:31:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:50,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2021-06-10 14:31:50,200 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.988673139158576 [2021-06-10 14:31:50,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2021-06-10 14:31:50,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2021-06-10 14:31:50,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:50,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2021-06-10 14:31:50,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,202 INFO L185 Difference]: Start difference. First operand has 339 places, 204 transitions, 5165 flow. Second operand 3 states and 611 transitions. [2021-06-10 14:31:50,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 203 transitions, 5165 flow [2021-06-10 14:31:50,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 203 transitions, 743 flow, removed 2211 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:50,271 INFO L241 Difference]: Finished difference. Result has 340 places, 203 transitions, 743 flow [2021-06-10 14:31:50,271 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=743, PETRI_PLACES=340, PETRI_TRANSITIONS=203} [2021-06-10 14:31:50,272 INFO L343 CegarLoopForPetriNet]: 339 programPoint places, 1 predicate places. [2021-06-10 14:31:50,272 INFO L480 AbstractCegarLoop]: Abstraction has has 340 places, 203 transitions, 743 flow [2021-06-10 14:31:50,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,272 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:50,272 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:50,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-06-10 14:31:50,272 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:50,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1114350847, now seen corresponding path program 1 times [2021-06-10 14:31:50,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:50,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862790991] [2021-06-10 14:31:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:50,296 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:50,298 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:50,305 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:50,306 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:50,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-06-10 14:31:50,306 WARN L342 ceAbstractionStarter]: 67 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:50,306 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 68 thread instances. [2021-06-10 14:31:50,358 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:50,358 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:50,358 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:50,358 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:50,358 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:50,358 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:50,358 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:50,358 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:50,358 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:50,358 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:50,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 346 places, 209 transitions, 5314 flow [2021-06-10 14:31:50,426 INFO L129 PetriNetUnfolder]: 0/413 cut-off events. [2021-06-10 14:31:50,426 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:50,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2964 conditions, 413 events. 0/413 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1504 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 0. Up to 69 conditions per place. [2021-06-10 14:31:50,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 209 transitions, 5314 flow [2021-06-10 14:31:50,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 207 transitions, 5310 flow [2021-06-10 14:31:50,429 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:50,429 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:50,429 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:50,429 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:50,429 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:50,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:50,429 INFO L82 PathProgramCache]: Analyzing trace with hash 237155, now seen corresponding path program 1 times [2021-06-10 14:31:50,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:50,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031691448] [2021-06-10 14:31:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:50,442 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:50,442 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:50,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031691448] [2021-06-10 14:31:50,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:50,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:50,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439673472] [2021-06-10 14:31:50,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:50,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:50,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:50,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:50,445 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 209 [2021-06-10 14:31:50,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 207 transitions, 5310 flow. Second operand has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:50,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 209 [2021-06-10 14:31:50,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:50,536 INFO L129 PetriNetUnfolder]: 0/206 cut-off events. [2021-06-10 14:31:50,536 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:50,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2759 conditions, 206 events. 0/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 471 event pairs, 0 based on Foata normal form. 69/275 useless extension candidates. Maximal degree in co-relation 0. Up to 69 conditions per place. [2021-06-10 14:31:50,536 INFO L132 encePairwiseOnDemand]: 207/209 looper letters, 0 selfloop transitions, 1 changer transitions 0/206 dead transitions. [2021-06-10 14:31:50,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 206 transitions, 5310 flow [2021-06-10 14:31:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:50,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2021-06-10 14:31:50,537 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.988835725677831 [2021-06-10 14:31:50,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2021-06-10 14:31:50,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2021-06-10 14:31:50,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:50,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2021-06-10 14:31:50,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,538 INFO L185 Difference]: Start difference. First operand has 344 places, 207 transitions, 5310 flow. Second operand 3 states and 620 transitions. [2021-06-10 14:31:50,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 206 transitions, 5310 flow [2021-06-10 14:31:50,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 206 transitions, 754 flow, removed 2278 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:50,610 INFO L241 Difference]: Finished difference. Result has 345 places, 206 transitions, 754 flow [2021-06-10 14:31:50,611 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=754, PETRI_PLACES=345, PETRI_TRANSITIONS=206} [2021-06-10 14:31:50,611 INFO L343 CegarLoopForPetriNet]: 344 programPoint places, 1 predicate places. [2021-06-10 14:31:50,611 INFO L480 AbstractCegarLoop]: Abstraction has has 345 places, 206 transitions, 754 flow [2021-06-10 14:31:50,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,611 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:50,611 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:50,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-06-10 14:31:50,611 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:50,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:50,611 INFO L82 PathProgramCache]: Analyzing trace with hash 660683726, now seen corresponding path program 1 times [2021-06-10 14:31:50,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:50,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879927153] [2021-06-10 14:31:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:50,625 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:50,627 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:50,638 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:50,638 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:50,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-06-10 14:31:50,638 WARN L342 ceAbstractionStarter]: 68 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:50,638 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 69 thread instances. [2021-06-10 14:31:50,690 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:50,691 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:50,691 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:50,691 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:50,691 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:50,691 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:50,691 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:50,691 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:50,691 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:50,691 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:50,694 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 351 places, 212 transitions, 5461 flow [2021-06-10 14:31:50,768 INFO L129 PetriNetUnfolder]: 0/419 cut-off events. [2021-06-10 14:31:50,768 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:50,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3042 conditions, 419 events. 0/419 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1556 event pairs, 0 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2021-06-10 14:31:50,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 351 places, 212 transitions, 5461 flow [2021-06-10 14:31:50,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 349 places, 210 transitions, 5457 flow [2021-06-10 14:31:50,770 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:50,770 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:50,770 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:50,770 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:50,771 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:50,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:50,771 INFO L82 PathProgramCache]: Analyzing trace with hash 243939, now seen corresponding path program 1 times [2021-06-10 14:31:50,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:50,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915090604] [2021-06-10 14:31:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:50,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:50,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:50,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915090604] [2021-06-10 14:31:50,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:50,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:50,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110232447] [2021-06-10 14:31:50,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:50,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:50,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:50,787 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 212 [2021-06-10 14:31:50,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 210 transitions, 5457 flow. Second operand has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:50,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 212 [2021-06-10 14:31:50,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:50,843 INFO L129 PetriNetUnfolder]: 0/209 cut-off events. [2021-06-10 14:31:50,843 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:50,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2834 conditions, 209 events. 0/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 439 event pairs, 0 based on Foata normal form. 70/279 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2021-06-10 14:31:50,843 INFO L132 encePairwiseOnDemand]: 210/212 looper letters, 0 selfloop transitions, 1 changer transitions 0/209 dead transitions. [2021-06-10 14:31:50,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 209 transitions, 5457 flow [2021-06-10 14:31:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2021-06-10 14:31:50,844 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9889937106918238 [2021-06-10 14:31:50,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2021-06-10 14:31:50,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2021-06-10 14:31:50,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:50,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2021-06-10 14:31:50,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,845 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,845 INFO L185 Difference]: Start difference. First operand has 349 places, 210 transitions, 5457 flow. Second operand 3 states and 629 transitions. [2021-06-10 14:31:50,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 209 transitions, 5457 flow [2021-06-10 14:31:50,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 209 transitions, 765 flow, removed 2346 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:50,916 INFO L241 Difference]: Finished difference. Result has 350 places, 209 transitions, 765 flow [2021-06-10 14:31:50,917 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=765, PETRI_PLACES=350, PETRI_TRANSITIONS=209} [2021-06-10 14:31:50,917 INFO L343 CegarLoopForPetriNet]: 349 programPoint places, 1 predicate places. [2021-06-10 14:31:50,917 INFO L480 AbstractCegarLoop]: Abstraction has has 350 places, 209 transitions, 765 flow [2021-06-10 14:31:50,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:50,917 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:50,917 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:50,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-06-10 14:31:50,917 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash -754160187, now seen corresponding path program 1 times [2021-06-10 14:31:50,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:50,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768981442] [2021-06-10 14:31:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:50,931 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:50,933 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:50,941 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:50,941 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:50,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-06-10 14:31:50,941 WARN L342 ceAbstractionStarter]: 69 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:50,941 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 70 thread instances. [2021-06-10 14:31:50,996 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:50,997 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:50,997 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:50,997 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:50,997 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:50,997 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:50,997 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:50,997 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:50,997 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:50,997 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:50,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 356 places, 215 transitions, 5610 flow [2021-06-10 14:31:51,073 INFO L129 PetriNetUnfolder]: 0/425 cut-off events. [2021-06-10 14:31:51,073 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:51,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 425 events. 0/425 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1580 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2021-06-10 14:31:51,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 356 places, 215 transitions, 5610 flow [2021-06-10 14:31:51,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 354 places, 213 transitions, 5606 flow [2021-06-10 14:31:51,076 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:51,076 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:51,076 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:51,076 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:51,076 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:51,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:51,076 INFO L82 PathProgramCache]: Analyzing trace with hash 250819, now seen corresponding path program 1 times [2021-06-10 14:31:51,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:51,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239667744] [2021-06-10 14:31:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:51,090 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:51,095 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:51,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239667744] [2021-06-10 14:31:51,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:51,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:51,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219728595] [2021-06-10 14:31:51,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:51,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:51,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:51,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:51,098 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 215 [2021-06-10 14:31:51,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 213 transitions, 5606 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:51,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 215 [2021-06-10 14:31:51,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:51,154 INFO L129 PetriNetUnfolder]: 0/212 cut-off events. [2021-06-10 14:31:51,155 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:51,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2910 conditions, 212 events. 0/212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 448 event pairs, 0 based on Foata normal form. 71/283 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2021-06-10 14:31:51,155 INFO L132 encePairwiseOnDemand]: 213/215 looper letters, 0 selfloop transitions, 1 changer transitions 0/212 dead transitions. [2021-06-10 14:31:51,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 212 transitions, 5606 flow [2021-06-10 14:31:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 638 transitions. [2021-06-10 14:31:51,156 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9891472868217054 [2021-06-10 14:31:51,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 638 transitions. [2021-06-10 14:31:51,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 638 transitions. [2021-06-10 14:31:51,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:51,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 638 transitions. [2021-06-10 14:31:51,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,157 INFO L185 Difference]: Start difference. First operand has 354 places, 213 transitions, 5606 flow. Second operand 3 states and 638 transitions. [2021-06-10 14:31:51,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 212 transitions, 5606 flow [2021-06-10 14:31:51,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 212 transitions, 776 flow, removed 2415 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:51,228 INFO L241 Difference]: Finished difference. Result has 355 places, 212 transitions, 776 flow [2021-06-10 14:31:51,228 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=776, PETRI_PLACES=355, PETRI_TRANSITIONS=212} [2021-06-10 14:31:51,228 INFO L343 CegarLoopForPetriNet]: 354 programPoint places, 1 predicate places. [2021-06-10 14:31:51,228 INFO L480 AbstractCegarLoop]: Abstraction has has 355 places, 212 transitions, 776 flow [2021-06-10 14:31:51,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,228 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:51,228 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:51,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-06-10 14:31:51,229 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1018517423, now seen corresponding path program 1 times [2021-06-10 14:31:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:51,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624510584] [2021-06-10 14:31:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:51,243 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:51,244 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:51,253 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:51,253 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:51,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-06-10 14:31:51,253 WARN L342 ceAbstractionStarter]: 70 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:51,253 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 71 thread instances. [2021-06-10 14:31:51,302 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:51,302 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:51,302 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:51,302 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:51,302 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:51,302 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:51,302 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:51,302 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:51,302 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:51,302 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:51,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 361 places, 218 transitions, 5761 flow [2021-06-10 14:31:51,379 INFO L129 PetriNetUnfolder]: 0/431 cut-off events. [2021-06-10 14:31:51,380 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:51,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 431 events. 0/431 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1611 event pairs, 0 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2021-06-10 14:31:51,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 361 places, 218 transitions, 5761 flow [2021-06-10 14:31:51,382 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 359 places, 216 transitions, 5757 flow [2021-06-10 14:31:51,382 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:51,382 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:51,382 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:51,382 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:51,382 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:51,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:51,383 INFO L82 PathProgramCache]: Analyzing trace with hash 257795, now seen corresponding path program 1 times [2021-06-10 14:31:51,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:51,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965167439] [2021-06-10 14:31:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:51,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:51,397 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:51,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965167439] [2021-06-10 14:31:51,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:51,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:51,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438345692] [2021-06-10 14:31:51,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:51,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:51,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:51,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:51,400 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 218 [2021-06-10 14:31:51,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 216 transitions, 5757 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:51,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 218 [2021-06-10 14:31:51,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:51,529 INFO L129 PetriNetUnfolder]: 0/215 cut-off events. [2021-06-10 14:31:51,529 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:51,529 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2987 conditions, 215 events. 0/215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 414 event pairs, 0 based on Foata normal form. 72/287 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2021-06-10 14:31:51,530 INFO L132 encePairwiseOnDemand]: 216/218 looper letters, 0 selfloop transitions, 1 changer transitions 0/215 dead transitions. [2021-06-10 14:31:51,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 215 transitions, 5757 flow [2021-06-10 14:31:51,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:51,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2021-06-10 14:31:51,531 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9892966360856269 [2021-06-10 14:31:51,531 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2021-06-10 14:31:51,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2021-06-10 14:31:51,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:51,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2021-06-10 14:31:51,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,533 INFO L185 Difference]: Start difference. First operand has 359 places, 216 transitions, 5757 flow. Second operand 3 states and 647 transitions. [2021-06-10 14:31:51,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 215 transitions, 5757 flow [2021-06-10 14:31:51,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 215 transitions, 787 flow, removed 2485 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:51,606 INFO L241 Difference]: Finished difference. Result has 360 places, 215 transitions, 787 flow [2021-06-10 14:31:51,606 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=787, PETRI_PLACES=360, PETRI_TRANSITIONS=215} [2021-06-10 14:31:51,606 INFO L343 CegarLoopForPetriNet]: 359 programPoint places, 1 predicate places. [2021-06-10 14:31:51,606 INFO L480 AbstractCegarLoop]: Abstraction has has 360 places, 215 transitions, 787 flow [2021-06-10 14:31:51,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,606 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:51,606 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:51,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-06-10 14:31:51,606 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:51,607 INFO L82 PathProgramCache]: Analyzing trace with hash -640033195, now seen corresponding path program 1 times [2021-06-10 14:31:51,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:51,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550277219] [2021-06-10 14:31:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:51,623 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:51,625 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:51,635 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:51,636 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:51,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-06-10 14:31:51,636 WARN L342 ceAbstractionStarter]: 71 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:51,636 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 72 thread instances. [2021-06-10 14:31:51,697 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:51,697 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:51,698 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:51,698 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:51,698 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:51,698 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:51,698 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:51,698 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:51,698 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:51,698 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:51,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 366 places, 221 transitions, 5914 flow [2021-06-10 14:31:51,826 INFO L129 PetriNetUnfolder]: 0/437 cut-off events. [2021-06-10 14:31:51,826 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:51,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3282 conditions, 437 events. 0/437 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1544 event pairs, 0 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 0. Up to 73 conditions per place. [2021-06-10 14:31:51,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 366 places, 221 transitions, 5914 flow [2021-06-10 14:31:51,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 364 places, 219 transitions, 5910 flow [2021-06-10 14:31:51,830 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:51,830 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:51,830 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:51,830 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:51,830 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:51,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:51,830 INFO L82 PathProgramCache]: Analyzing trace with hash 264867, now seen corresponding path program 1 times [2021-06-10 14:31:51,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:51,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497941690] [2021-06-10 14:31:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:51,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:51,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:51,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497941690] [2021-06-10 14:31:51,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:51,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:51,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459783486] [2021-06-10 14:31:51,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:51,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:51,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:51,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:51,850 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 221 [2021-06-10 14:31:51,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 219 transitions, 5910 flow. Second operand has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:51,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 221 [2021-06-10 14:31:51,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:51,928 INFO L129 PetriNetUnfolder]: 0/218 cut-off events. [2021-06-10 14:31:51,928 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:51,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3065 conditions, 218 events. 0/218 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 477 event pairs, 0 based on Foata normal form. 73/291 useless extension candidates. Maximal degree in co-relation 0. Up to 73 conditions per place. [2021-06-10 14:31:51,929 INFO L132 encePairwiseOnDemand]: 219/221 looper letters, 0 selfloop transitions, 1 changer transitions 0/218 dead transitions. [2021-06-10 14:31:51,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 218 transitions, 5910 flow [2021-06-10 14:31:51,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2021-06-10 14:31:51,930 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9894419306184012 [2021-06-10 14:31:51,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2021-06-10 14:31:51,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2021-06-10 14:31:51,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:51,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2021-06-10 14:31:51,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,931 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:51,931 INFO L185 Difference]: Start difference. First operand has 364 places, 219 transitions, 5910 flow. Second operand 3 states and 656 transitions. [2021-06-10 14:31:51,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 218 transitions, 5910 flow [2021-06-10 14:31:52,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 218 transitions, 798 flow, removed 2556 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:52,005 INFO L241 Difference]: Finished difference. Result has 365 places, 218 transitions, 798 flow [2021-06-10 14:31:52,005 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=798, PETRI_PLACES=365, PETRI_TRANSITIONS=218} [2021-06-10 14:31:52,005 INFO L343 CegarLoopForPetriNet]: 364 programPoint places, 1 predicate places. [2021-06-10 14:31:52,005 INFO L480 AbstractCegarLoop]: Abstraction has has 365 places, 218 transitions, 798 flow [2021-06-10 14:31:52,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:52,006 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:52,006 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:52,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-06-10 14:31:52,006 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash -968754668, now seen corresponding path program 1 times [2021-06-10 14:31:52,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:52,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008657453] [2021-06-10 14:31:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:52,022 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:52,024 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:52,036 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:52,036 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:52,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-06-10 14:31:52,036 WARN L342 ceAbstractionStarter]: 72 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:52,036 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 73 thread instances. [2021-06-10 14:31:52,103 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:52,103 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:52,104 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:52,104 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:52,104 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:52,104 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:52,104 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:52,104 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:52,104 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:52,104 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:52,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 371 places, 224 transitions, 6069 flow [2021-06-10 14:31:52,208 INFO L129 PetriNetUnfolder]: 0/443 cut-off events. [2021-06-10 14:31:52,208 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:52,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3364 conditions, 443 events. 0/443 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1645 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2021-06-10 14:31:52,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 371 places, 224 transitions, 6069 flow [2021-06-10 14:31:52,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 369 places, 222 transitions, 6065 flow [2021-06-10 14:31:52,211 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:52,212 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:52,212 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:52,212 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:52,212 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:52,212 INFO L82 PathProgramCache]: Analyzing trace with hash 272035, now seen corresponding path program 1 times [2021-06-10 14:31:52,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:52,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486062795] [2021-06-10 14:31:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:52,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:52,228 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:52,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486062795] [2021-06-10 14:31:52,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:52,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:52,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921629627] [2021-06-10 14:31:52,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:52,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:52,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:52,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:52,231 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 224 [2021-06-10 14:31:52,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 222 transitions, 6065 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:52,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:52,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 224 [2021-06-10 14:31:52,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:52,310 INFO L129 PetriNetUnfolder]: 0/221 cut-off events. [2021-06-10 14:31:52,310 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:52,310 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 221 events. 0/221 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 423 event pairs, 0 based on Foata normal form. 74/295 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2021-06-10 14:31:52,311 INFO L132 encePairwiseOnDemand]: 222/224 looper letters, 0 selfloop transitions, 1 changer transitions 0/221 dead transitions. [2021-06-10 14:31:52,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 221 transitions, 6065 flow [2021-06-10 14:31:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 665 transitions. [2021-06-10 14:31:52,311 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9895833333333334 [2021-06-10 14:31:52,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 665 transitions. [2021-06-10 14:31:52,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 665 transitions. [2021-06-10 14:31:52,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:52,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 665 transitions. [2021-06-10 14:31:52,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:52,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:52,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:52,313 INFO L185 Difference]: Start difference. First operand has 369 places, 222 transitions, 6065 flow. Second operand 3 states and 665 transitions. [2021-06-10 14:31:52,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 221 transitions, 6065 flow [2021-06-10 14:31:52,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 221 transitions, 809 flow, removed 2628 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:52,382 INFO L241 Difference]: Finished difference. Result has 370 places, 221 transitions, 809 flow [2021-06-10 14:31:52,383 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=809, PETRI_PLACES=370, PETRI_TRANSITIONS=221} [2021-06-10 14:31:52,383 INFO L343 CegarLoopForPetriNet]: 369 programPoint places, 1 predicate places. [2021-06-10 14:31:52,383 INFO L480 AbstractCegarLoop]: Abstraction has has 370 places, 221 transitions, 809 flow [2021-06-10 14:31:52,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:52,383 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:52,383 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:52,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-06-10 14:31:52,383 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:52,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:52,383 INFO L82 PathProgramCache]: Analyzing trace with hash -219590607, now seen corresponding path program 1 times [2021-06-10 14:31:52,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:52,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105957140] [2021-06-10 14:31:52,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:52,399 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:52,401 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:52,411 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:52,411 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:52,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-06-10 14:31:52,411 WARN L342 ceAbstractionStarter]: 73 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:52,411 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 74 thread instances. [2021-06-10 14:31:52,462 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:52,462 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:52,462 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:52,463 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:52,463 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:52,463 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:52,463 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:52,463 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:52,463 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:52,463 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:52,464 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 376 places, 227 transitions, 6226 flow [2021-06-10 14:31:52,551 INFO L129 PetriNetUnfolder]: 0/449 cut-off events. [2021-06-10 14:31:52,551 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:52,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3447 conditions, 449 events. 0/449 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1675 event pairs, 0 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2021-06-10 14:31:52,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 376 places, 227 transitions, 6226 flow [2021-06-10 14:31:52,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 225 transitions, 6222 flow [2021-06-10 14:31:52,554 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:52,554 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:52,554 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:52,554 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:52,555 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash 279299, now seen corresponding path program 1 times [2021-06-10 14:31:52,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:52,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289245657] [2021-06-10 14:31:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:52,569 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:52,569 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:52,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289245657] [2021-06-10 14:31:52,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:52,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:52,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875553156] [2021-06-10 14:31:52,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:52,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:52,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:52,572 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 227 [2021-06-10 14:31:52,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 225 transitions, 6222 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:52,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:52,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 227 [2021-06-10 14:31:52,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:52,641 INFO L129 PetriNetUnfolder]: 0/224 cut-off events. [2021-06-10 14:31:52,641 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:52,641 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3224 conditions, 224 events. 0/224 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 488 event pairs, 0 based on Foata normal form. 75/299 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2021-06-10 14:31:52,641 INFO L132 encePairwiseOnDemand]: 225/227 looper letters, 0 selfloop transitions, 1 changer transitions 0/224 dead transitions. [2021-06-10 14:31:52,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 224 transitions, 6222 flow [2021-06-10 14:31:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:52,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 674 transitions. [2021-06-10 14:31:52,642 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9897209985315712 [2021-06-10 14:31:52,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 674 transitions. [2021-06-10 14:31:52,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 674 transitions. [2021-06-10 14:31:52,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:52,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 674 transitions. [2021-06-10 14:31:52,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:52,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:52,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:52,643 INFO L185 Difference]: Start difference. First operand has 374 places, 225 transitions, 6222 flow. Second operand 3 states and 674 transitions. [2021-06-10 14:31:52,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 224 transitions, 6222 flow [2021-06-10 14:31:52,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 224 transitions, 820 flow, removed 2701 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:52,717 INFO L241 Difference]: Finished difference. Result has 375 places, 224 transitions, 820 flow [2021-06-10 14:31:52,717 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=820, PETRI_PLACES=375, PETRI_TRANSITIONS=224} [2021-06-10 14:31:52,717 INFO L343 CegarLoopForPetriNet]: 374 programPoint places, 1 predicate places. [2021-06-10 14:31:52,717 INFO L480 AbstractCegarLoop]: Abstraction has has 375 places, 224 transitions, 820 flow [2021-06-10 14:31:52,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:52,717 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:52,717 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:52,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-06-10 14:31:52,718 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:52,718 INFO L82 PathProgramCache]: Analyzing trace with hash 384134551, now seen corresponding path program 1 times [2021-06-10 14:31:52,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:52,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185197370] [2021-06-10 14:31:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:52,733 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:52,734 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:52,745 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:52,745 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:52,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-06-10 14:31:52,745 WARN L342 ceAbstractionStarter]: 74 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:52,745 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 75 thread instances. [2021-06-10 14:31:52,799 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:52,800 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:52,800 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:52,800 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:52,800 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:52,800 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:52,800 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:52,800 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:52,800 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:52,800 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:52,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 381 places, 230 transitions, 6385 flow [2021-06-10 14:31:52,921 INFO L129 PetriNetUnfolder]: 0/455 cut-off events. [2021-06-10 14:31:52,922 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:52,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3531 conditions, 455 events. 0/455 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1673 event pairs, 0 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-06-10 14:31:52,922 INFO L82 GeneralOperation]: Start removeDead. Operand has 381 places, 230 transitions, 6385 flow [2021-06-10 14:31:52,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 379 places, 228 transitions, 6381 flow [2021-06-10 14:31:52,925 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:52,925 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:52,925 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:52,925 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:52,925 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:52,925 INFO L82 PathProgramCache]: Analyzing trace with hash 286659, now seen corresponding path program 1 times [2021-06-10 14:31:52,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:52,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237674769] [2021-06-10 14:31:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:52,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:52,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:52,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237674769] [2021-06-10 14:31:52,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:52,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:52,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139928454] [2021-06-10 14:31:52,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:52,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:52,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:52,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:52,941 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 230 [2021-06-10 14:31:52,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 228 transitions, 6381 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:52,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:52,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 230 [2021-06-10 14:31:52,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:53,009 INFO L129 PetriNetUnfolder]: 0/227 cut-off events. [2021-06-10 14:31:53,010 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:53,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3305 conditions, 227 events. 0/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 439 event pairs, 0 based on Foata normal form. 76/303 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-06-10 14:31:53,010 INFO L132 encePairwiseOnDemand]: 228/230 looper letters, 0 selfloop transitions, 1 changer transitions 0/227 dead transitions. [2021-06-10 14:31:53,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 227 transitions, 6381 flow [2021-06-10 14:31:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2021-06-10 14:31:53,011 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9898550724637681 [2021-06-10 14:31:53,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2021-06-10 14:31:53,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2021-06-10 14:31:53,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:53,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2021-06-10 14:31:53,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,012 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,012 INFO L185 Difference]: Start difference. First operand has 379 places, 228 transitions, 6381 flow. Second operand 3 states and 683 transitions. [2021-06-10 14:31:53,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 227 transitions, 6381 flow [2021-06-10 14:31:53,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 227 transitions, 831 flow, removed 2775 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:53,084 INFO L241 Difference]: Finished difference. Result has 380 places, 227 transitions, 831 flow [2021-06-10 14:31:53,085 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=831, PETRI_PLACES=380, PETRI_TRANSITIONS=227} [2021-06-10 14:31:53,085 INFO L343 CegarLoopForPetriNet]: 379 programPoint places, 1 predicate places. [2021-06-10 14:31:53,085 INFO L480 AbstractCegarLoop]: Abstraction has has 380 places, 227 transitions, 831 flow [2021-06-10 14:31:53,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,085 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:53,085 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:53,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-06-10 14:31:53,085 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash 808822489, now seen corresponding path program 1 times [2021-06-10 14:31:53,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:53,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578628858] [2021-06-10 14:31:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:53,098 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:53,100 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:53,109 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:53,110 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:53,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-06-10 14:31:53,110 WARN L342 ceAbstractionStarter]: 75 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:53,110 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 76 thread instances. [2021-06-10 14:31:53,166 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:53,166 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:53,166 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:53,166 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:53,166 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:53,166 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:53,166 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:53,166 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:53,166 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:53,166 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:53,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 386 places, 233 transitions, 6546 flow [2021-06-10 14:31:53,258 INFO L129 PetriNetUnfolder]: 0/461 cut-off events. [2021-06-10 14:31:53,259 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:53,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 461 events. 0/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1682 event pairs, 0 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 0. Up to 77 conditions per place. [2021-06-10 14:31:53,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 233 transitions, 6546 flow [2021-06-10 14:31:53,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 384 places, 231 transitions, 6542 flow [2021-06-10 14:31:53,262 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:53,262 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:53,262 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:53,262 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:53,262 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:53,262 INFO L82 PathProgramCache]: Analyzing trace with hash 294115, now seen corresponding path program 1 times [2021-06-10 14:31:53,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:53,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032440795] [2021-06-10 14:31:53,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:53,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:53,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:53,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032440795] [2021-06-10 14:31:53,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:53,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:53,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86254410] [2021-06-10 14:31:53,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:53,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:53,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:53,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:53,278 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 233 [2021-06-10 14:31:53,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 231 transitions, 6542 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:53,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 233 [2021-06-10 14:31:53,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:53,349 INFO L129 PetriNetUnfolder]: 0/230 cut-off events. [2021-06-10 14:31:53,349 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:53,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 230 events. 0/230 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 393 event pairs, 0 based on Foata normal form. 77/307 useless extension candidates. Maximal degree in co-relation 0. Up to 77 conditions per place. [2021-06-10 14:31:53,350 INFO L132 encePairwiseOnDemand]: 231/233 looper letters, 0 selfloop transitions, 1 changer transitions 0/230 dead transitions. [2021-06-10 14:31:53,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 230 transitions, 6542 flow [2021-06-10 14:31:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:53,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2021-06-10 14:31:53,351 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9899856938483548 [2021-06-10 14:31:53,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2021-06-10 14:31:53,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2021-06-10 14:31:53,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:53,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2021-06-10 14:31:53,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,352 INFO L185 Difference]: Start difference. First operand has 384 places, 231 transitions, 6542 flow. Second operand 3 states and 692 transitions. [2021-06-10 14:31:53,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 230 transitions, 6542 flow [2021-06-10 14:31:53,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 230 transitions, 842 flow, removed 2850 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:53,430 INFO L241 Difference]: Finished difference. Result has 385 places, 230 transitions, 842 flow [2021-06-10 14:31:53,430 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=842, PETRI_PLACES=385, PETRI_TRANSITIONS=230} [2021-06-10 14:31:53,430 INFO L343 CegarLoopForPetriNet]: 384 programPoint places, 1 predicate places. [2021-06-10 14:31:53,430 INFO L480 AbstractCegarLoop]: Abstraction has has 385 places, 230 transitions, 842 flow [2021-06-10 14:31:53,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,430 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:53,430 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:53,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-06-10 14:31:53,430 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2026045606, now seen corresponding path program 1 times [2021-06-10 14:31:53,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:53,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946409925] [2021-06-10 14:31:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:53,443 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:53,446 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:53,455 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:53,455 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:53,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-06-10 14:31:53,456 WARN L342 ceAbstractionStarter]: 76 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:53,456 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 77 thread instances. [2021-06-10 14:31:53,508 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:53,509 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:53,509 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:53,509 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:53,509 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:53,509 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:53,509 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:53,509 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:53,509 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:53,509 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:53,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 391 places, 236 transitions, 6709 flow [2021-06-10 14:31:53,608 INFO L129 PetriNetUnfolder]: 0/467 cut-off events. [2021-06-10 14:31:53,608 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:53,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3702 conditions, 467 events. 0/467 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1767 event pairs, 0 based on Foata normal form. 0/389 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2021-06-10 14:31:53,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 391 places, 236 transitions, 6709 flow [2021-06-10 14:31:53,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 389 places, 234 transitions, 6705 flow [2021-06-10 14:31:53,611 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:53,611 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:53,612 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:53,612 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:53,612 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:53,612 INFO L82 PathProgramCache]: Analyzing trace with hash 301667, now seen corresponding path program 1 times [2021-06-10 14:31:53,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:53,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217236829] [2021-06-10 14:31:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:53,633 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:53,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:53,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217236829] [2021-06-10 14:31:53,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:53,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:53,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345990999] [2021-06-10 14:31:53,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:53,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:53,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:53,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:53,637 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 236 [2021-06-10 14:31:53,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 234 transitions, 6705 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:53,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 236 [2021-06-10 14:31:53,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:53,711 INFO L129 PetriNetUnfolder]: 0/233 cut-off events. [2021-06-10 14:31:53,712 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:53,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3470 conditions, 233 events. 0/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 437 event pairs, 0 based on Foata normal form. 78/311 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2021-06-10 14:31:53,712 INFO L132 encePairwiseOnDemand]: 234/236 looper letters, 0 selfloop transitions, 1 changer transitions 0/233 dead transitions. [2021-06-10 14:31:53,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 233 transitions, 6705 flow [2021-06-10 14:31:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 701 transitions. [2021-06-10 14:31:53,713 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9901129943502824 [2021-06-10 14:31:53,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 701 transitions. [2021-06-10 14:31:53,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 701 transitions. [2021-06-10 14:31:53,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:53,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 701 transitions. [2021-06-10 14:31:53,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,715 INFO L185 Difference]: Start difference. First operand has 389 places, 234 transitions, 6705 flow. Second operand 3 states and 701 transitions. [2021-06-10 14:31:53,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 233 transitions, 6705 flow [2021-06-10 14:31:53,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 233 transitions, 853 flow, removed 2926 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:53,796 INFO L241 Difference]: Finished difference. Result has 390 places, 233 transitions, 853 flow [2021-06-10 14:31:53,797 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=853, PETRI_PLACES=390, PETRI_TRANSITIONS=233} [2021-06-10 14:31:53,797 INFO L343 CegarLoopForPetriNet]: 389 programPoint places, 1 predicate places. [2021-06-10 14:31:53,797 INFO L480 AbstractCegarLoop]: Abstraction has has 390 places, 233 transitions, 853 flow [2021-06-10 14:31:53,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:53,797 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:53,797 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:53,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-06-10 14:31:53,797 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:53,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1437071923, now seen corresponding path program 1 times [2021-06-10 14:31:53,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:53,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841172772] [2021-06-10 14:31:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:53,811 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:53,813 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:53,823 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:53,823 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:53,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-06-10 14:31:53,824 WARN L342 ceAbstractionStarter]: 77 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:53,824 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 78 thread instances. [2021-06-10 14:31:53,901 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:53,901 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:53,902 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:53,902 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:53,902 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:53,902 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:53,902 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:53,902 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:53,902 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:53,902 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:53,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 396 places, 239 transitions, 6874 flow [2021-06-10 14:31:54,002 INFO L129 PetriNetUnfolder]: 0/473 cut-off events. [2021-06-10 14:31:54,002 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:54,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3789 conditions, 473 events. 0/473 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1766 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2021-06-10 14:31:54,003 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 239 transitions, 6874 flow [2021-06-10 14:31:54,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 394 places, 237 transitions, 6870 flow [2021-06-10 14:31:54,006 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:54,006 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:54,006 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:54,006 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:54,006 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:54,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:54,006 INFO L82 PathProgramCache]: Analyzing trace with hash 309315, now seen corresponding path program 1 times [2021-06-10 14:31:54,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:54,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750234323] [2021-06-10 14:31:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:54,022 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:54,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:54,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750234323] [2021-06-10 14:31:54,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:54,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:54,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554481740] [2021-06-10 14:31:54,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:54,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:54,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:54,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:54,025 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 239 [2021-06-10 14:31:54,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 237 transitions, 6870 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:54,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 239 [2021-06-10 14:31:54,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:54,102 INFO L129 PetriNetUnfolder]: 0/236 cut-off events. [2021-06-10 14:31:54,102 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:54,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3554 conditions, 236 events. 0/236 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 479 event pairs, 0 based on Foata normal form. 79/315 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2021-06-10 14:31:54,103 INFO L132 encePairwiseOnDemand]: 237/239 looper letters, 0 selfloop transitions, 1 changer transitions 0/236 dead transitions. [2021-06-10 14:31:54,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 236 transitions, 6870 flow [2021-06-10 14:31:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2021-06-10 14:31:54,104 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9902370990237099 [2021-06-10 14:31:54,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2021-06-10 14:31:54,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2021-06-10 14:31:54,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:54,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2021-06-10 14:31:54,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,105 INFO L185 Difference]: Start difference. First operand has 394 places, 237 transitions, 6870 flow. Second operand 3 states and 710 transitions. [2021-06-10 14:31:54,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 236 transitions, 6870 flow [2021-06-10 14:31:54,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 236 transitions, 864 flow, removed 3003 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:54,193 INFO L241 Difference]: Finished difference. Result has 395 places, 236 transitions, 864 flow [2021-06-10 14:31:54,193 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=864, PETRI_PLACES=395, PETRI_TRANSITIONS=236} [2021-06-10 14:31:54,193 INFO L343 CegarLoopForPetriNet]: 394 programPoint places, 1 predicate places. [2021-06-10 14:31:54,193 INFO L480 AbstractCegarLoop]: Abstraction has has 395 places, 236 transitions, 864 flow [2021-06-10 14:31:54,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,193 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:54,194 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:54,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-06-10 14:31:54,194 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:54,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:54,194 INFO L82 PathProgramCache]: Analyzing trace with hash 304770013, now seen corresponding path program 1 times [2021-06-10 14:31:54,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:54,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299128074] [2021-06-10 14:31:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:54,247 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:54,249 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:54,259 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:54,259 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:54,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-06-10 14:31:54,259 WARN L342 ceAbstractionStarter]: 78 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:54,259 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 79 thread instances. [2021-06-10 14:31:54,311 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:54,311 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:54,311 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:54,311 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:54,312 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:54,312 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:54,312 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:54,312 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:54,312 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:54,312 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:54,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 401 places, 242 transitions, 7041 flow [2021-06-10 14:31:54,413 INFO L129 PetriNetUnfolder]: 0/479 cut-off events. [2021-06-10 14:31:54,413 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:54,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3877 conditions, 479 events. 0/479 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1741 event pairs, 0 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 0. Up to 80 conditions per place. [2021-06-10 14:31:54,413 INFO L82 GeneralOperation]: Start removeDead. Operand has 401 places, 242 transitions, 7041 flow [2021-06-10 14:31:54,416 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 240 transitions, 7037 flow [2021-06-10 14:31:54,416 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:54,416 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:54,416 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:54,416 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:54,416 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:54,416 INFO L82 PathProgramCache]: Analyzing trace with hash 317059, now seen corresponding path program 1 times [2021-06-10 14:31:54,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:54,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279888398] [2021-06-10 14:31:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:54,434 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:54,434 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:54,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279888398] [2021-06-10 14:31:54,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:54,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:54,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542484971] [2021-06-10 14:31:54,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:54,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:54,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:54,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:54,439 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 242 [2021-06-10 14:31:54,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 240 transitions, 7037 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:54,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 242 [2021-06-10 14:31:54,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:54,517 INFO L129 PetriNetUnfolder]: 0/239 cut-off events. [2021-06-10 14:31:54,517 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:54,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3639 conditions, 239 events. 0/239 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 464 event pairs, 0 based on Foata normal form. 80/319 useless extension candidates. Maximal degree in co-relation 0. Up to 80 conditions per place. [2021-06-10 14:31:54,518 INFO L132 encePairwiseOnDemand]: 240/242 looper letters, 0 selfloop transitions, 1 changer transitions 0/239 dead transitions. [2021-06-10 14:31:54,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 239 transitions, 7037 flow [2021-06-10 14:31:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2021-06-10 14:31:54,519 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.990358126721763 [2021-06-10 14:31:54,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2021-06-10 14:31:54,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2021-06-10 14:31:54,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:54,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2021-06-10 14:31:54,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,520 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,520 INFO L185 Difference]: Start difference. First operand has 399 places, 240 transitions, 7037 flow. Second operand 3 states and 719 transitions. [2021-06-10 14:31:54,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 239 transitions, 7037 flow [2021-06-10 14:31:54,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 239 transitions, 875 flow, removed 3081 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:54,610 INFO L241 Difference]: Finished difference. Result has 400 places, 239 transitions, 875 flow [2021-06-10 14:31:54,610 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=875, PETRI_PLACES=400, PETRI_TRANSITIONS=239} [2021-06-10 14:31:54,610 INFO L343 CegarLoopForPetriNet]: 399 programPoint places, 1 predicate places. [2021-06-10 14:31:54,610 INFO L480 AbstractCegarLoop]: Abstraction has has 400 places, 239 transitions, 875 flow [2021-06-10 14:31:54,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,611 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:54,611 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:54,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-06-10 14:31:54,611 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:54,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:54,611 INFO L82 PathProgramCache]: Analyzing trace with hash 269996173, now seen corresponding path program 1 times [2021-06-10 14:31:54,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:54,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010300712] [2021-06-10 14:31:54,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:54,628 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:54,630 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:54,640 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:54,641 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:54,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-06-10 14:31:54,641 WARN L342 ceAbstractionStarter]: 79 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:54,641 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 80 thread instances. [2021-06-10 14:31:54,695 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:54,696 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:54,696 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:54,696 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:54,696 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:54,696 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:54,696 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:54,696 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:54,696 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:54,696 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:54,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 406 places, 245 transitions, 7210 flow [2021-06-10 14:31:54,800 INFO L129 PetriNetUnfolder]: 0/485 cut-off events. [2021-06-10 14:31:54,800 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:54,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3966 conditions, 485 events. 0/485 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1768 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 0. Up to 81 conditions per place. [2021-06-10 14:31:54,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 406 places, 245 transitions, 7210 flow [2021-06-10 14:31:54,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 404 places, 243 transitions, 7206 flow [2021-06-10 14:31:54,803 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:54,803 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:54,803 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:54,803 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:54,803 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:54,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:54,803 INFO L82 PathProgramCache]: Analyzing trace with hash 324899, now seen corresponding path program 1 times [2021-06-10 14:31:54,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:54,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475773666] [2021-06-10 14:31:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:54,820 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:54,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:54,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475773666] [2021-06-10 14:31:54,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:54,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:54,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261542736] [2021-06-10 14:31:54,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:54,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:54,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:54,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:54,824 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 245 [2021-06-10 14:31:54,824 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 243 transitions, 7206 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:54,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 245 [2021-06-10 14:31:54,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:54,904 INFO L129 PetriNetUnfolder]: 0/242 cut-off events. [2021-06-10 14:31:54,904 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:54,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3725 conditions, 242 events. 0/242 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 467 event pairs, 0 based on Foata normal form. 81/323 useless extension candidates. Maximal degree in co-relation 0. Up to 81 conditions per place. [2021-06-10 14:31:54,905 INFO L132 encePairwiseOnDemand]: 243/245 looper letters, 0 selfloop transitions, 1 changer transitions 0/242 dead transitions. [2021-06-10 14:31:54,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 242 transitions, 7206 flow [2021-06-10 14:31:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2021-06-10 14:31:54,905 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9904761904761905 [2021-06-10 14:31:54,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2021-06-10 14:31:54,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2021-06-10 14:31:54,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:54,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2021-06-10 14:31:54,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:54,907 INFO L185 Difference]: Start difference. First operand has 404 places, 243 transitions, 7206 flow. Second operand 3 states and 728 transitions. [2021-06-10 14:31:54,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 242 transitions, 7206 flow [2021-06-10 14:31:55,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 242 transitions, 886 flow, removed 3160 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:55,004 INFO L241 Difference]: Finished difference. Result has 405 places, 242 transitions, 886 flow [2021-06-10 14:31:55,004 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=886, PETRI_PLACES=405, PETRI_TRANSITIONS=242} [2021-06-10 14:31:55,004 INFO L343 CegarLoopForPetriNet]: 404 programPoint places, 1 predicate places. [2021-06-10 14:31:55,004 INFO L480 AbstractCegarLoop]: Abstraction has has 405 places, 242 transitions, 886 flow [2021-06-10 14:31:55,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:55,004 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:55,004 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:55,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-06-10 14:31:55,004 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:55,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:55,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1591291808, now seen corresponding path program 1 times [2021-06-10 14:31:55,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:55,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017698855] [2021-06-10 14:31:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:55,022 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:55,024 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:55,035 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:55,035 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:55,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-06-10 14:31:55,036 WARN L342 ceAbstractionStarter]: 80 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:55,036 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 81 thread instances. [2021-06-10 14:31:55,093 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:55,093 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:55,094 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:55,094 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:55,094 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:55,094 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:55,094 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:55,094 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:55,094 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:55,094 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:55,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 411 places, 248 transitions, 7381 flow [2021-06-10 14:31:55,206 INFO L129 PetriNetUnfolder]: 0/491 cut-off events. [2021-06-10 14:31:55,207 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:55,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 491 events. 0/491 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1826 event pairs, 0 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 0. Up to 82 conditions per place. [2021-06-10 14:31:55,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 411 places, 248 transitions, 7381 flow [2021-06-10 14:31:55,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 409 places, 246 transitions, 7377 flow [2021-06-10 14:31:55,210 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:55,210 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:55,210 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:55,210 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:55,210 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:55,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:55,210 INFO L82 PathProgramCache]: Analyzing trace with hash 332835, now seen corresponding path program 1 times [2021-06-10 14:31:55,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:55,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042126177] [2021-06-10 14:31:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:55,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:55,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:55,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042126177] [2021-06-10 14:31:55,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:55,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:55,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991776053] [2021-06-10 14:31:55,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:55,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:55,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:55,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:55,232 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 248 [2021-06-10 14:31:55,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 246 transitions, 7377 flow. Second operand has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:55,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:55,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 248 [2021-06-10 14:31:55,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:55,316 INFO L129 PetriNetUnfolder]: 0/245 cut-off events. [2021-06-10 14:31:55,317 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:55,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3812 conditions, 245 events. 0/245 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 465 event pairs, 0 based on Foata normal form. 82/327 useless extension candidates. Maximal degree in co-relation 0. Up to 82 conditions per place. [2021-06-10 14:31:55,317 INFO L132 encePairwiseOnDemand]: 246/248 looper letters, 0 selfloop transitions, 1 changer transitions 0/245 dead transitions. [2021-06-10 14:31:55,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 245 transitions, 7377 flow [2021-06-10 14:31:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:55,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 737 transitions. [2021-06-10 14:31:55,318 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9905913978494624 [2021-06-10 14:31:55,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 737 transitions. [2021-06-10 14:31:55,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 737 transitions. [2021-06-10 14:31:55,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:55,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 737 transitions. [2021-06-10 14:31:55,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:55,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:55,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:55,319 INFO L185 Difference]: Start difference. First operand has 409 places, 246 transitions, 7377 flow. Second operand 3 states and 737 transitions. [2021-06-10 14:31:55,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 245 transitions, 7377 flow [2021-06-10 14:31:55,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 245 transitions, 897 flow, removed 3240 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:55,426 INFO L241 Difference]: Finished difference. Result has 410 places, 245 transitions, 897 flow [2021-06-10 14:31:55,426 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=897, PETRI_PLACES=410, PETRI_TRANSITIONS=245} [2021-06-10 14:31:55,426 INFO L343 CegarLoopForPetriNet]: 409 programPoint places, 1 predicate places. [2021-06-10 14:31:55,426 INFO L480 AbstractCegarLoop]: Abstraction has has 410 places, 245 transitions, 897 flow [2021-06-10 14:31:55,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:55,426 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:55,426 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:55,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-06-10 14:31:55,427 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:55,427 INFO L82 PathProgramCache]: Analyzing trace with hash 804956825, now seen corresponding path program 1 times [2021-06-10 14:31:55,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:55,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430615426] [2021-06-10 14:31:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:55,445 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:55,447 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:55,458 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:55,459 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:55,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-06-10 14:31:55,459 WARN L342 ceAbstractionStarter]: 81 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:55,459 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 82 thread instances. [2021-06-10 14:31:55,520 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:55,521 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:55,521 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:55,521 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:55,521 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:55,521 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:55,521 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:55,521 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:55,521 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:55,521 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:55,524 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 416 places, 251 transitions, 7554 flow [2021-06-10 14:31:55,672 INFO L129 PetriNetUnfolder]: 0/497 cut-off events. [2021-06-10 14:31:55,673 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:55,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4147 conditions, 497 events. 0/497 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1890 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2021-06-10 14:31:55,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 416 places, 251 transitions, 7554 flow [2021-06-10 14:31:55,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 414 places, 249 transitions, 7550 flow [2021-06-10 14:31:55,676 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:55,676 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:55,676 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:55,676 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:55,676 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:55,676 INFO L82 PathProgramCache]: Analyzing trace with hash 340867, now seen corresponding path program 1 times [2021-06-10 14:31:55,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:55,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915807324] [2021-06-10 14:31:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:55,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:55,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:55,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915807324] [2021-06-10 14:31:55,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:55,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:55,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449641483] [2021-06-10 14:31:55,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:55,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:55,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:55,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:55,695 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 251 [2021-06-10 14:31:55,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 249 transitions, 7550 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:55,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:55,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 251 [2021-06-10 14:31:55,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:55,778 INFO L129 PetriNetUnfolder]: 0/248 cut-off events. [2021-06-10 14:31:55,779 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:55,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3900 conditions, 248 events. 0/248 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 529 event pairs, 0 based on Foata normal form. 83/331 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2021-06-10 14:31:55,779 INFO L132 encePairwiseOnDemand]: 249/251 looper letters, 0 selfloop transitions, 1 changer transitions 0/248 dead transitions. [2021-06-10 14:31:55,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 248 transitions, 7550 flow [2021-06-10 14:31:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2021-06-10 14:31:55,780 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9907038512616202 [2021-06-10 14:31:55,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2021-06-10 14:31:55,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2021-06-10 14:31:55,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:55,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2021-06-10 14:31:55,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:55,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:55,781 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:55,781 INFO L185 Difference]: Start difference. First operand has 414 places, 249 transitions, 7550 flow. Second operand 3 states and 746 transitions. [2021-06-10 14:31:55,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 248 transitions, 7550 flow [2021-06-10 14:31:55,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 248 transitions, 908 flow, removed 3321 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:55,884 INFO L241 Difference]: Finished difference. Result has 415 places, 248 transitions, 908 flow [2021-06-10 14:31:55,885 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=908, PETRI_PLACES=415, PETRI_TRANSITIONS=248} [2021-06-10 14:31:55,885 INFO L343 CegarLoopForPetriNet]: 414 programPoint places, 1 predicate places. [2021-06-10 14:31:55,885 INFO L480 AbstractCegarLoop]: Abstraction has has 415 places, 248 transitions, 908 flow [2021-06-10 14:31:55,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:55,885 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:55,885 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:55,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-06-10 14:31:55,885 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash 170821411, now seen corresponding path program 1 times [2021-06-10 14:31:55,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:55,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729844466] [2021-06-10 14:31:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:55,901 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:55,903 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:55,915 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:55,915 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:55,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-06-10 14:31:55,916 WARN L342 ceAbstractionStarter]: 82 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:55,916 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 83 thread instances. [2021-06-10 14:31:55,978 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:55,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:55,978 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:55,978 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:55,979 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:55,979 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:55,979 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:55,979 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:55,979 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:55,979 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:55,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 421 places, 254 transitions, 7729 flow [2021-06-10 14:31:56,091 INFO L129 PetriNetUnfolder]: 0/503 cut-off events. [2021-06-10 14:31:56,091 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:56,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4239 conditions, 503 events. 0/503 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1819 event pairs, 0 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2021-06-10 14:31:56,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 421 places, 254 transitions, 7729 flow [2021-06-10 14:31:56,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 419 places, 252 transitions, 7725 flow [2021-06-10 14:31:56,094 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:56,094 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:56,095 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:56,095 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:56,095 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:56,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:56,095 INFO L82 PathProgramCache]: Analyzing trace with hash 348995, now seen corresponding path program 1 times [2021-06-10 14:31:56,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:56,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651557567] [2021-06-10 14:31:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:56,110 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:56,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:56,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651557567] [2021-06-10 14:31:56,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:56,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:56,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011250650] [2021-06-10 14:31:56,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:56,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:56,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:56,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:56,113 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 254 [2021-06-10 14:31:56,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 252 transitions, 7725 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:56,114 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:56,114 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 254 [2021-06-10 14:31:56,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:56,200 INFO L129 PetriNetUnfolder]: 0/251 cut-off events. [2021-06-10 14:31:56,200 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:56,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3989 conditions, 251 events. 0/251 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 508 event pairs, 0 based on Foata normal form. 84/335 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2021-06-10 14:31:56,201 INFO L132 encePairwiseOnDemand]: 252/254 looper letters, 0 selfloop transitions, 1 changer transitions 0/251 dead transitions. [2021-06-10 14:31:56,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 251 transitions, 7725 flow [2021-06-10 14:31:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2021-06-10 14:31:56,201 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9908136482939632 [2021-06-10 14:31:56,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2021-06-10 14:31:56,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2021-06-10 14:31:56,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:56,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2021-06-10 14:31:56,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:56,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:56,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:56,203 INFO L185 Difference]: Start difference. First operand has 419 places, 252 transitions, 7725 flow. Second operand 3 states and 755 transitions. [2021-06-10 14:31:56,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 251 transitions, 7725 flow [2021-06-10 14:31:56,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 251 transitions, 919 flow, removed 3403 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:56,324 INFO L241 Difference]: Finished difference. Result has 420 places, 251 transitions, 919 flow [2021-06-10 14:31:56,325 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=919, PETRI_PLACES=420, PETRI_TRANSITIONS=251} [2021-06-10 14:31:56,325 INFO L343 CegarLoopForPetriNet]: 419 programPoint places, 1 predicate places. [2021-06-10 14:31:56,325 INFO L480 AbstractCegarLoop]: Abstraction has has 420 places, 251 transitions, 919 flow [2021-06-10 14:31:56,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:56,325 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:56,325 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:56,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-06-10 14:31:56,325 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:56,325 INFO L82 PathProgramCache]: Analyzing trace with hash -69961871, now seen corresponding path program 1 times [2021-06-10 14:31:56,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:56,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119721311] [2021-06-10 14:31:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:56,341 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:56,343 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:56,355 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:56,356 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:56,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-06-10 14:31:56,356 WARN L342 ceAbstractionStarter]: 83 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:56,356 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 84 thread instances. [2021-06-10 14:31:56,422 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:56,422 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:56,422 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:56,422 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:56,422 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:56,423 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:56,423 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:56,423 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:56,423 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:56,423 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:56,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 426 places, 257 transitions, 7906 flow [2021-06-10 14:31:56,538 INFO L129 PetriNetUnfolder]: 0/509 cut-off events. [2021-06-10 14:31:56,538 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:56,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4332 conditions, 509 events. 0/509 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1864 event pairs, 0 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 0. Up to 85 conditions per place. [2021-06-10 14:31:56,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 426 places, 257 transitions, 7906 flow [2021-06-10 14:31:56,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 424 places, 255 transitions, 7902 flow [2021-06-10 14:31:56,541 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:56,541 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:56,541 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:56,541 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:56,541 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:56,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:56,542 INFO L82 PathProgramCache]: Analyzing trace with hash 357219, now seen corresponding path program 1 times [2021-06-10 14:31:56,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:56,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433114432] [2021-06-10 14:31:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:56,558 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:56,558 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:56,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433114432] [2021-06-10 14:31:56,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:56,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:56,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046887479] [2021-06-10 14:31:56,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:56,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:56,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:56,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:56,561 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 257 [2021-06-10 14:31:56,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 255 transitions, 7902 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:56,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:56,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 257 [2021-06-10 14:31:56,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:56,649 INFO L129 PetriNetUnfolder]: 0/254 cut-off events. [2021-06-10 14:31:56,649 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:56,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4079 conditions, 254 events. 0/254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 446 event pairs, 0 based on Foata normal form. 85/339 useless extension candidates. Maximal degree in co-relation 0. Up to 85 conditions per place. [2021-06-10 14:31:56,650 INFO L132 encePairwiseOnDemand]: 255/257 looper letters, 0 selfloop transitions, 1 changer transitions 0/254 dead transitions. [2021-06-10 14:31:56,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 254 transitions, 7902 flow [2021-06-10 14:31:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2021-06-10 14:31:56,651 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9909208819714657 [2021-06-10 14:31:56,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2021-06-10 14:31:56,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2021-06-10 14:31:56,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:56,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2021-06-10 14:31:56,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:56,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:56,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:56,652 INFO L185 Difference]: Start difference. First operand has 424 places, 255 transitions, 7902 flow. Second operand 3 states and 764 transitions. [2021-06-10 14:31:56,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 254 transitions, 7902 flow [2021-06-10 14:31:56,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 254 transitions, 930 flow, removed 3486 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:56,789 INFO L241 Difference]: Finished difference. Result has 425 places, 254 transitions, 930 flow [2021-06-10 14:31:56,789 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=930, PETRI_PLACES=425, PETRI_TRANSITIONS=254} [2021-06-10 14:31:56,789 INFO L343 CegarLoopForPetriNet]: 424 programPoint places, 1 predicate places. [2021-06-10 14:31:56,789 INFO L480 AbstractCegarLoop]: Abstraction has has 425 places, 254 transitions, 930 flow [2021-06-10 14:31:56,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:56,789 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:56,789 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:56,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-06-10 14:31:56,789 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:56,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:56,790 INFO L82 PathProgramCache]: Analyzing trace with hash 909733606, now seen corresponding path program 1 times [2021-06-10 14:31:56,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:56,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814661466] [2021-06-10 14:31:56,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:56,806 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:56,807 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:56,820 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:56,820 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:56,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-06-10 14:31:56,820 WARN L342 ceAbstractionStarter]: 84 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:56,821 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 85 thread instances. [2021-06-10 14:31:56,886 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:56,886 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:56,887 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:56,887 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:56,887 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:56,887 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:56,887 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:56,887 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:56,887 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:56,887 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:56,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 431 places, 260 transitions, 8085 flow [2021-06-10 14:31:57,049 INFO L129 PetriNetUnfolder]: 0/515 cut-off events. [2021-06-10 14:31:57,049 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:57,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4426 conditions, 515 events. 0/515 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1934 event pairs, 0 based on Foata normal form. 0/429 useless extension candidates. Maximal degree in co-relation 0. Up to 86 conditions per place. [2021-06-10 14:31:57,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 431 places, 260 transitions, 8085 flow [2021-06-10 14:31:57,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 429 places, 258 transitions, 8081 flow [2021-06-10 14:31:57,053 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:57,053 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:57,053 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:57,053 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:57,053 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash 365539, now seen corresponding path program 1 times [2021-06-10 14:31:57,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:57,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218925533] [2021-06-10 14:31:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:57,075 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:57,076 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:57,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218925533] [2021-06-10 14:31:57,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:57,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:57,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348974426] [2021-06-10 14:31:57,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:57,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:57,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:57,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:57,079 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 260 [2021-06-10 14:31:57,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 258 transitions, 8081 flow. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:57,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:57,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 260 [2021-06-10 14:31:57,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:57,186 INFO L129 PetriNetUnfolder]: 0/257 cut-off events. [2021-06-10 14:31:57,186 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:57,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4170 conditions, 257 events. 0/257 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 519 event pairs, 0 based on Foata normal form. 86/343 useless extension candidates. Maximal degree in co-relation 0. Up to 86 conditions per place. [2021-06-10 14:31:57,186 INFO L132 encePairwiseOnDemand]: 258/260 looper letters, 0 selfloop transitions, 1 changer transitions 0/257 dead transitions. [2021-06-10 14:31:57,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 257 transitions, 8081 flow [2021-06-10 14:31:57,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2021-06-10 14:31:57,187 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9910256410256411 [2021-06-10 14:31:57,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2021-06-10 14:31:57,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2021-06-10 14:31:57,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:57,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2021-06-10 14:31:57,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:57,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:57,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:57,189 INFO L185 Difference]: Start difference. First operand has 429 places, 258 transitions, 8081 flow. Second operand 3 states and 773 transitions. [2021-06-10 14:31:57,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 257 transitions, 8081 flow [2021-06-10 14:31:57,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 257 transitions, 941 flow, removed 3570 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:57,349 INFO L241 Difference]: Finished difference. Result has 430 places, 257 transitions, 941 flow [2021-06-10 14:31:57,349 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=941, PETRI_PLACES=430, PETRI_TRANSITIONS=257} [2021-06-10 14:31:57,349 INFO L343 CegarLoopForPetriNet]: 429 programPoint places, 1 predicate places. [2021-06-10 14:31:57,349 INFO L480 AbstractCegarLoop]: Abstraction has has 430 places, 257 transitions, 941 flow [2021-06-10 14:31:57,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:57,350 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:57,350 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:57,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-06-10 14:31:57,350 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:57,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:57,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2041095531, now seen corresponding path program 1 times [2021-06-10 14:31:57,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:57,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461413382] [2021-06-10 14:31:57,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:57,370 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:57,372 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:57,387 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:57,387 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:57,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-06-10 14:31:57,387 WARN L342 ceAbstractionStarter]: 85 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:57,387 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 86 thread instances. [2021-06-10 14:31:57,461 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:57,461 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:57,462 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:57,462 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:57,462 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:57,462 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:57,462 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:57,462 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:57,462 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:57,462 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:57,464 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 436 places, 263 transitions, 8266 flow [2021-06-10 14:31:57,600 INFO L129 PetriNetUnfolder]: 0/521 cut-off events. [2021-06-10 14:31:57,601 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:57,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 521 events. 0/521 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1961 event pairs, 0 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2021-06-10 14:31:57,601 INFO L82 GeneralOperation]: Start removeDead. Operand has 436 places, 263 transitions, 8266 flow [2021-06-10 14:31:57,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 434 places, 261 transitions, 8262 flow [2021-06-10 14:31:57,605 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:57,605 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:57,605 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:57,605 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:57,605 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:57,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:57,605 INFO L82 PathProgramCache]: Analyzing trace with hash 373955, now seen corresponding path program 1 times [2021-06-10 14:31:57,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:57,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933949152] [2021-06-10 14:31:57,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:57,628 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:57,629 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:57,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933949152] [2021-06-10 14:31:57,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:57,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:57,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671489376] [2021-06-10 14:31:57,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:57,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:57,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:57,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:57,633 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 263 [2021-06-10 14:31:57,633 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 261 transitions, 8262 flow. Second operand has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:57,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:57,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 263 [2021-06-10 14:31:57,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:57,742 INFO L129 PetriNetUnfolder]: 0/260 cut-off events. [2021-06-10 14:31:57,742 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:57,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4262 conditions, 260 events. 0/260 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 520 event pairs, 0 based on Foata normal form. 87/347 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2021-06-10 14:31:57,743 INFO L132 encePairwiseOnDemand]: 261/263 looper letters, 0 selfloop transitions, 1 changer transitions 0/260 dead transitions. [2021-06-10 14:31:57,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 260 transitions, 8262 flow [2021-06-10 14:31:57,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:57,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2021-06-10 14:31:57,744 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.991128010139417 [2021-06-10 14:31:57,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2021-06-10 14:31:57,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2021-06-10 14:31:57,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:57,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2021-06-10 14:31:57,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:57,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:57,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:57,746 INFO L185 Difference]: Start difference. First operand has 434 places, 261 transitions, 8262 flow. Second operand 3 states and 782 transitions. [2021-06-10 14:31:57,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 260 transitions, 8262 flow [2021-06-10 14:31:57,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 260 transitions, 952 flow, removed 3655 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:57,918 INFO L241 Difference]: Finished difference. Result has 435 places, 260 transitions, 952 flow [2021-06-10 14:31:57,918 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=952, PETRI_PLACES=435, PETRI_TRANSITIONS=260} [2021-06-10 14:31:57,918 INFO L343 CegarLoopForPetriNet]: 434 programPoint places, 1 predicate places. [2021-06-10 14:31:57,918 INFO L480 AbstractCegarLoop]: Abstraction has has 435 places, 260 transitions, 952 flow [2021-06-10 14:31:57,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:57,919 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:57,919 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:57,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-06-10 14:31:57,919 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:57,919 INFO L82 PathProgramCache]: Analyzing trace with hash -542989463, now seen corresponding path program 1 times [2021-06-10 14:31:57,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:57,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731923389] [2021-06-10 14:31:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:57,942 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:57,944 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:57,959 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:57,959 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:57,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-06-10 14:31:57,959 WARN L342 ceAbstractionStarter]: 86 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:57,959 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 87 thread instances. [2021-06-10 14:31:58,028 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:58,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:58,029 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:58,029 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:58,029 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:58,029 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:58,029 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:58,029 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:58,029 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:58,029 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:58,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 441 places, 266 transitions, 8449 flow [2021-06-10 14:31:58,172 INFO L129 PetriNetUnfolder]: 0/527 cut-off events. [2021-06-10 14:31:58,172 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:58,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4617 conditions, 527 events. 0/527 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1953 event pairs, 0 based on Foata normal form. 0/439 useless extension candidates. Maximal degree in co-relation 0. Up to 88 conditions per place. [2021-06-10 14:31:58,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 441 places, 266 transitions, 8449 flow [2021-06-10 14:31:58,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 439 places, 264 transitions, 8445 flow [2021-06-10 14:31:58,176 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:58,176 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:58,176 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:58,177 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:58,177 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:58,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:58,177 INFO L82 PathProgramCache]: Analyzing trace with hash 382467, now seen corresponding path program 1 times [2021-06-10 14:31:58,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:58,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440077475] [2021-06-10 14:31:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:58,197 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:58,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:58,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440077475] [2021-06-10 14:31:58,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:58,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:58,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534349744] [2021-06-10 14:31:58,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:58,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:58,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:58,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:58,201 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 266 [2021-06-10 14:31:58,201 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 264 transitions, 8445 flow. Second operand has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:58,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:58,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 266 [2021-06-10 14:31:58,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:58,299 INFO L129 PetriNetUnfolder]: 0/263 cut-off events. [2021-06-10 14:31:58,299 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:58,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4355 conditions, 263 events. 0/263 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 534 event pairs, 0 based on Foata normal form. 88/351 useless extension candidates. Maximal degree in co-relation 0. Up to 88 conditions per place. [2021-06-10 14:31:58,300 INFO L132 encePairwiseOnDemand]: 264/266 looper letters, 0 selfloop transitions, 1 changer transitions 0/263 dead transitions. [2021-06-10 14:31:58,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 263 transitions, 8445 flow [2021-06-10 14:31:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 791 transitions. [2021-06-10 14:31:58,301 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9912280701754386 [2021-06-10 14:31:58,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 791 transitions. [2021-06-10 14:31:58,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 791 transitions. [2021-06-10 14:31:58,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:58,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 791 transitions. [2021-06-10 14:31:58,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:58,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:58,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:58,302 INFO L185 Difference]: Start difference. First operand has 439 places, 264 transitions, 8445 flow. Second operand 3 states and 791 transitions. [2021-06-10 14:31:58,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 263 transitions, 8445 flow [2021-06-10 14:31:58,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 263 transitions, 963 flow, removed 3741 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:58,472 INFO L241 Difference]: Finished difference. Result has 440 places, 263 transitions, 963 flow [2021-06-10 14:31:58,473 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=963, PETRI_PLACES=440, PETRI_TRANSITIONS=263} [2021-06-10 14:31:58,473 INFO L343 CegarLoopForPetriNet]: 439 programPoint places, 1 predicate places. [2021-06-10 14:31:58,473 INFO L480 AbstractCegarLoop]: Abstraction has has 440 places, 263 transitions, 963 flow [2021-06-10 14:31:58,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:58,473 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:58,473 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:58,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-06-10 14:31:58,473 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:58,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:58,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2057549701, now seen corresponding path program 1 times [2021-06-10 14:31:58,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:58,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966805531] [2021-06-10 14:31:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:58,493 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:58,494 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:58,508 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:58,508 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:58,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-06-10 14:31:58,508 WARN L342 ceAbstractionStarter]: 87 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:58,508 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 88 thread instances. [2021-06-10 14:31:58,576 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:58,576 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:58,576 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:58,576 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:58,577 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:58,577 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:58,577 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:58,577 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:58,577 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:58,577 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:58,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 446 places, 269 transitions, 8634 flow [2021-06-10 14:31:58,702 INFO L129 PetriNetUnfolder]: 0/533 cut-off events. [2021-06-10 14:31:58,703 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:58,703 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4714 conditions, 533 events. 0/533 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2009 event pairs, 0 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 0. Up to 89 conditions per place. [2021-06-10 14:31:58,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 446 places, 269 transitions, 8634 flow [2021-06-10 14:31:58,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 444 places, 267 transitions, 8630 flow [2021-06-10 14:31:58,706 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:58,706 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:58,706 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:58,706 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:58,706 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:58,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:58,706 INFO L82 PathProgramCache]: Analyzing trace with hash 391075, now seen corresponding path program 1 times [2021-06-10 14:31:58,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:58,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769975861] [2021-06-10 14:31:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:58,726 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:58,726 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:58,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769975861] [2021-06-10 14:31:58,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:58,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:58,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148716777] [2021-06-10 14:31:58,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:58,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:58,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:58,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:58,729 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 269 [2021-06-10 14:31:58,730 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 267 transitions, 8630 flow. Second operand has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:58,730 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:58,730 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 269 [2021-06-10 14:31:58,730 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:58,826 INFO L129 PetriNetUnfolder]: 0/266 cut-off events. [2021-06-10 14:31:58,826 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:58,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4449 conditions, 266 events. 0/266 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 551 event pairs, 0 based on Foata normal form. 89/355 useless extension candidates. Maximal degree in co-relation 0. Up to 89 conditions per place. [2021-06-10 14:31:58,827 INFO L132 encePairwiseOnDemand]: 267/269 looper letters, 0 selfloop transitions, 1 changer transitions 0/266 dead transitions. [2021-06-10 14:31:58,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 266 transitions, 8630 flow [2021-06-10 14:31:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2021-06-10 14:31:58,828 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9913258983890955 [2021-06-10 14:31:58,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2021-06-10 14:31:58,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2021-06-10 14:31:58,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:58,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2021-06-10 14:31:58,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:58,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:58,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:58,829 INFO L185 Difference]: Start difference. First operand has 444 places, 267 transitions, 8630 flow. Second operand 3 states and 800 transitions. [2021-06-10 14:31:58,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 266 transitions, 8630 flow [2021-06-10 14:31:59,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 266 transitions, 974 flow, removed 3828 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:59,057 INFO L241 Difference]: Finished difference. Result has 445 places, 266 transitions, 974 flow [2021-06-10 14:31:59,057 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=974, PETRI_PLACES=445, PETRI_TRANSITIONS=266} [2021-06-10 14:31:59,058 INFO L343 CegarLoopForPetriNet]: 444 programPoint places, 1 predicate places. [2021-06-10 14:31:59,058 INFO L480 AbstractCegarLoop]: Abstraction has has 445 places, 266 transitions, 974 flow [2021-06-10 14:31:59,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:59,058 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:59,058 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:59,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-06-10 14:31:59,058 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:59,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:59,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2031919404, now seen corresponding path program 1 times [2021-06-10 14:31:59,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:59,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764657287] [2021-06-10 14:31:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:59,079 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:59,081 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:59,095 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:59,095 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:59,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-06-10 14:31:59,095 WARN L342 ceAbstractionStarter]: 88 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:59,095 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 89 thread instances. [2021-06-10 14:31:59,159 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:59,159 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:59,159 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:59,159 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:59,159 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:59,159 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:59,159 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:59,159 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:59,159 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:59,159 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:59,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 451 places, 272 transitions, 8821 flow [2021-06-10 14:31:59,288 INFO L129 PetriNetUnfolder]: 0/539 cut-off events. [2021-06-10 14:31:59,288 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:59,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4812 conditions, 539 events. 0/539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2051 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2021-06-10 14:31:59,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 451 places, 272 transitions, 8821 flow [2021-06-10 14:31:59,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 449 places, 270 transitions, 8817 flow [2021-06-10 14:31:59,291 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:31:59,291 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:59,292 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:59,292 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:59,292 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:59,292 INFO L82 PathProgramCache]: Analyzing trace with hash 399779, now seen corresponding path program 1 times [2021-06-10 14:31:59,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:59,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741711754] [2021-06-10 14:31:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:59,315 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:59,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:59,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741711754] [2021-06-10 14:31:59,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:59,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:59,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039253913] [2021-06-10 14:31:59,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:59,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:59,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:59,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:59,318 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 272 [2021-06-10 14:31:59,318 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 270 transitions, 8817 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:59,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:59,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 272 [2021-06-10 14:31:59,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:59,417 INFO L129 PetriNetUnfolder]: 0/269 cut-off events. [2021-06-10 14:31:59,417 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:59,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4544 conditions, 269 events. 0/269 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 529 event pairs, 0 based on Foata normal form. 90/359 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2021-06-10 14:31:59,418 INFO L132 encePairwiseOnDemand]: 270/272 looper letters, 0 selfloop transitions, 1 changer transitions 0/269 dead transitions. [2021-06-10 14:31:59,418 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 269 transitions, 8817 flow [2021-06-10 14:31:59,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 809 transitions. [2021-06-10 14:31:59,419 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.991421568627451 [2021-06-10 14:31:59,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 809 transitions. [2021-06-10 14:31:59,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 809 transitions. [2021-06-10 14:31:59,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:59,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 809 transitions. [2021-06-10 14:31:59,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:59,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:59,420 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:59,420 INFO L185 Difference]: Start difference. First operand has 449 places, 270 transitions, 8817 flow. Second operand 3 states and 809 transitions. [2021-06-10 14:31:59,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 269 transitions, 8817 flow [2021-06-10 14:31:59,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 269 transitions, 985 flow, removed 3916 selfloop flow, removed 0 redundant places. [2021-06-10 14:31:59,614 INFO L241 Difference]: Finished difference. Result has 450 places, 269 transitions, 985 flow [2021-06-10 14:31:59,614 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=985, PETRI_PLACES=450, PETRI_TRANSITIONS=269} [2021-06-10 14:31:59,614 INFO L343 CegarLoopForPetriNet]: 449 programPoint places, 1 predicate places. [2021-06-10 14:31:59,614 INFO L480 AbstractCegarLoop]: Abstraction has has 450 places, 269 transitions, 985 flow [2021-06-10 14:31:59,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:59,614 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:59,614 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:31:59,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-06-10 14:31:59,615 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:59,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:59,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1915211327, now seen corresponding path program 1 times [2021-06-10 14:31:59,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:59,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200780443] [2021-06-10 14:31:59,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:59,636 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:31:59,638 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:31:59,651 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:31:59,651 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:31:59,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-06-10 14:31:59,651 WARN L342 ceAbstractionStarter]: 89 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:31:59,652 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 90 thread instances. [2021-06-10 14:31:59,720 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:31:59,720 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:31:59,720 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:31:59,720 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:31:59,720 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:31:59,720 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:31:59,720 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:31:59,720 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:31:59,721 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:31:59,721 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:31:59,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 456 places, 275 transitions, 9010 flow [2021-06-10 14:31:59,851 INFO L129 PetriNetUnfolder]: 0/545 cut-off events. [2021-06-10 14:31:59,852 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:59,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4911 conditions, 545 events. 0/545 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2082 event pairs, 0 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2021-06-10 14:31:59,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 456 places, 275 transitions, 9010 flow [2021-06-10 14:31:59,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 454 places, 273 transitions, 9006 flow [2021-06-10 14:31:59,855 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:31:59,855 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:59,855 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:31:59,856 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:31:59,856 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:31:59,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:31:59,856 INFO L82 PathProgramCache]: Analyzing trace with hash 408579, now seen corresponding path program 1 times [2021-06-10 14:31:59,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:31:59,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599295849] [2021-06-10 14:31:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:31:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:31:59,877 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:31:59,877 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:31:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:31:59,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599295849] [2021-06-10 14:31:59,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:31:59,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:31:59,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647384684] [2021-06-10 14:31:59,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:31:59,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:31:59,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:31:59,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:31:59,880 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 275 [2021-06-10 14:31:59,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 273 transitions, 9006 flow. Second operand has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:59,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:31:59,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 275 [2021-06-10 14:31:59,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:31:59,982 INFO L129 PetriNetUnfolder]: 0/272 cut-off events. [2021-06-10 14:31:59,983 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:31:59,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4640 conditions, 272 events. 0/272 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 497 event pairs, 0 based on Foata normal form. 91/363 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2021-06-10 14:31:59,983 INFO L132 encePairwiseOnDemand]: 273/275 looper letters, 0 selfloop transitions, 1 changer transitions 0/272 dead transitions. [2021-06-10 14:31:59,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 272 transitions, 9006 flow [2021-06-10 14:31:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:31:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:31:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 818 transitions. [2021-06-10 14:31:59,984 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9915151515151515 [2021-06-10 14:31:59,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 818 transitions. [2021-06-10 14:31:59,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 818 transitions. [2021-06-10 14:31:59,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:31:59,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 818 transitions. [2021-06-10 14:31:59,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:59,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:59,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:31:59,985 INFO L185 Difference]: Start difference. First operand has 454 places, 273 transitions, 9006 flow. Second operand 3 states and 818 transitions. [2021-06-10 14:31:59,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 272 transitions, 9006 flow [2021-06-10 14:32:00,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 272 transitions, 996 flow, removed 4005 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:00,186 INFO L241 Difference]: Finished difference. Result has 455 places, 272 transitions, 996 flow [2021-06-10 14:32:00,186 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=996, PETRI_PLACES=455, PETRI_TRANSITIONS=272} [2021-06-10 14:32:00,186 INFO L343 CegarLoopForPetriNet]: 454 programPoint places, 1 predicate places. [2021-06-10 14:32:00,186 INFO L480 AbstractCegarLoop]: Abstraction has has 455 places, 272 transitions, 996 flow [2021-06-10 14:32:00,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:00,187 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:00,187 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:00,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-06-10 14:32:00,187 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:00,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:00,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1288938671, now seen corresponding path program 1 times [2021-06-10 14:32:00,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:00,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123874358] [2021-06-10 14:32:00,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:00,209 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:00,211 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:00,227 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:00,228 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:00,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-06-10 14:32:00,228 WARN L342 ceAbstractionStarter]: 90 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:00,228 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 91 thread instances. [2021-06-10 14:32:00,295 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:00,295 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:00,295 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:00,295 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:00,295 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:00,295 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:00,295 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:00,295 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:00,295 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:00,295 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:00,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 461 places, 278 transitions, 9201 flow [2021-06-10 14:32:00,432 INFO L129 PetriNetUnfolder]: 0/551 cut-off events. [2021-06-10 14:32:00,432 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:00,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5011 conditions, 551 events. 0/551 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1983 event pairs, 0 based on Foata normal form. 0/459 useless extension candidates. Maximal degree in co-relation 0. Up to 92 conditions per place. [2021-06-10 14:32:00,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 461 places, 278 transitions, 9201 flow [2021-06-10 14:32:00,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 459 places, 276 transitions, 9197 flow [2021-06-10 14:32:00,436 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:00,436 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:00,436 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:00,436 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:00,436 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:00,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:00,436 INFO L82 PathProgramCache]: Analyzing trace with hash 417475, now seen corresponding path program 1 times [2021-06-10 14:32:00,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:00,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927986800] [2021-06-10 14:32:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:00,458 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:00,458 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:00,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927986800] [2021-06-10 14:32:00,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:00,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:00,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349253560] [2021-06-10 14:32:00,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:00,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:00,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:00,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:00,461 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 278 [2021-06-10 14:32:00,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 276 transitions, 9197 flow. Second operand has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:00,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:00,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 278 [2021-06-10 14:32:00,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:00,566 INFO L129 PetriNetUnfolder]: 0/275 cut-off events. [2021-06-10 14:32:00,566 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:00,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4737 conditions, 275 events. 0/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 558 event pairs, 0 based on Foata normal form. 92/367 useless extension candidates. Maximal degree in co-relation 0. Up to 92 conditions per place. [2021-06-10 14:32:00,567 INFO L132 encePairwiseOnDemand]: 276/278 looper letters, 0 selfloop transitions, 1 changer transitions 0/275 dead transitions. [2021-06-10 14:32:00,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 275 transitions, 9197 flow [2021-06-10 14:32:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2021-06-10 14:32:00,567 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9916067146282974 [2021-06-10 14:32:00,567 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2021-06-10 14:32:00,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2021-06-10 14:32:00,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:00,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2021-06-10 14:32:00,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:00,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:00,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:00,569 INFO L185 Difference]: Start difference. First operand has 459 places, 276 transitions, 9197 flow. Second operand 3 states and 827 transitions. [2021-06-10 14:32:00,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 275 transitions, 9197 flow [2021-06-10 14:32:00,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 275 transitions, 1007 flow, removed 4095 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:00,777 INFO L241 Difference]: Finished difference. Result has 460 places, 275 transitions, 1007 flow [2021-06-10 14:32:00,777 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1007, PETRI_PLACES=460, PETRI_TRANSITIONS=275} [2021-06-10 14:32:00,777 INFO L343 CegarLoopForPetriNet]: 459 programPoint places, 1 predicate places. [2021-06-10 14:32:00,778 INFO L480 AbstractCegarLoop]: Abstraction has has 460 places, 275 transitions, 1007 flow [2021-06-10 14:32:00,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:00,778 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:00,778 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:00,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-06-10 14:32:00,778 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:00,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:00,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1788980425, now seen corresponding path program 1 times [2021-06-10 14:32:00,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:00,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697032643] [2021-06-10 14:32:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:00,800 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:00,802 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:00,816 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:00,817 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:00,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-06-10 14:32:00,817 WARN L342 ceAbstractionStarter]: 91 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:00,817 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 92 thread instances. [2021-06-10 14:32:00,898 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:00,899 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:00,899 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:00,899 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:00,899 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:00,899 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:00,899 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:00,899 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:00,899 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:00,899 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:00,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 466 places, 281 transitions, 9394 flow [2021-06-10 14:32:01,040 INFO L129 PetriNetUnfolder]: 0/557 cut-off events. [2021-06-10 14:32:01,040 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:01,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5112 conditions, 557 events. 0/557 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2112 event pairs, 0 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 0. Up to 93 conditions per place. [2021-06-10 14:32:01,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 466 places, 281 transitions, 9394 flow [2021-06-10 14:32:01,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 464 places, 279 transitions, 9390 flow [2021-06-10 14:32:01,044 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:01,044 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:01,044 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:01,044 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:01,044 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:01,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:01,044 INFO L82 PathProgramCache]: Analyzing trace with hash 426467, now seen corresponding path program 1 times [2021-06-10 14:32:01,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:01,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69903117] [2021-06-10 14:32:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:01,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:01,106 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:01,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69903117] [2021-06-10 14:32:01,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:01,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:01,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621678315] [2021-06-10 14:32:01,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:01,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:01,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:01,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:01,109 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 281 [2021-06-10 14:32:01,110 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 279 transitions, 9390 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:01,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:01,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 281 [2021-06-10 14:32:01,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:01,214 INFO L129 PetriNetUnfolder]: 0/278 cut-off events. [2021-06-10 14:32:01,215 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:01,215 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4835 conditions, 278 events. 0/278 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 632 event pairs, 0 based on Foata normal form. 93/371 useless extension candidates. Maximal degree in co-relation 0. Up to 93 conditions per place. [2021-06-10 14:32:01,215 INFO L132 encePairwiseOnDemand]: 279/281 looper letters, 0 selfloop transitions, 1 changer transitions 0/278 dead transitions. [2021-06-10 14:32:01,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 278 transitions, 9390 flow [2021-06-10 14:32:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:01,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2021-06-10 14:32:01,216 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9916963226571768 [2021-06-10 14:32:01,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2021-06-10 14:32:01,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2021-06-10 14:32:01,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:01,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2021-06-10 14:32:01,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:01,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:01,217 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:01,217 INFO L185 Difference]: Start difference. First operand has 464 places, 279 transitions, 9390 flow. Second operand 3 states and 836 transitions. [2021-06-10 14:32:01,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 278 transitions, 9390 flow [2021-06-10 14:32:01,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 278 transitions, 1018 flow, removed 4186 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:01,435 INFO L241 Difference]: Finished difference. Result has 465 places, 278 transitions, 1018 flow [2021-06-10 14:32:01,435 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1018, PETRI_PLACES=465, PETRI_TRANSITIONS=278} [2021-06-10 14:32:01,435 INFO L343 CegarLoopForPetriNet]: 464 programPoint places, 1 predicate places. [2021-06-10 14:32:01,435 INFO L480 AbstractCegarLoop]: Abstraction has has 465 places, 278 transitions, 1018 flow [2021-06-10 14:32:01,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:01,435 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:01,436 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:01,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-06-10 14:32:01,436 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash 601729650, now seen corresponding path program 1 times [2021-06-10 14:32:01,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:01,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952328657] [2021-06-10 14:32:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:01,459 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:01,461 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:01,476 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:01,476 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:01,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-06-10 14:32:01,476 WARN L342 ceAbstractionStarter]: 92 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:01,476 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 93 thread instances. [2021-06-10 14:32:01,559 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:01,560 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:01,560 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:01,560 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:01,560 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:01,560 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:01,560 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:01,560 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:01,560 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:01,560 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:01,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 471 places, 284 transitions, 9589 flow [2021-06-10 14:32:01,703 INFO L129 PetriNetUnfolder]: 0/563 cut-off events. [2021-06-10 14:32:01,703 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:01,703 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5214 conditions, 563 events. 0/563 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2095 event pairs, 0 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 0. Up to 94 conditions per place. [2021-06-10 14:32:01,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 471 places, 284 transitions, 9589 flow [2021-06-10 14:32:01,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 469 places, 282 transitions, 9585 flow [2021-06-10 14:32:01,707 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:01,707 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:01,707 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:01,707 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:01,707 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:01,707 INFO L82 PathProgramCache]: Analyzing trace with hash 435555, now seen corresponding path program 1 times [2021-06-10 14:32:01,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:01,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022569681] [2021-06-10 14:32:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:01,728 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:01,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:01,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022569681] [2021-06-10 14:32:01,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:01,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:01,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902724332] [2021-06-10 14:32:01,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:01,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:01,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:01,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:01,731 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 284 [2021-06-10 14:32:01,732 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 282 transitions, 9585 flow. Second operand has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:01,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:01,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 284 [2021-06-10 14:32:01,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:01,841 INFO L129 PetriNetUnfolder]: 0/281 cut-off events. [2021-06-10 14:32:01,841 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:01,842 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4934 conditions, 281 events. 0/281 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 592 event pairs, 0 based on Foata normal form. 94/375 useless extension candidates. Maximal degree in co-relation 0. Up to 94 conditions per place. [2021-06-10 14:32:01,842 INFO L132 encePairwiseOnDemand]: 282/284 looper letters, 0 selfloop transitions, 1 changer transitions 0/281 dead transitions. [2021-06-10 14:32:01,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 281 transitions, 9585 flow [2021-06-10 14:32:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 845 transitions. [2021-06-10 14:32:01,843 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9917840375586855 [2021-06-10 14:32:01,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 845 transitions. [2021-06-10 14:32:01,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 845 transitions. [2021-06-10 14:32:01,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:01,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 845 transitions. [2021-06-10 14:32:01,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:01,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:01,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:01,844 INFO L185 Difference]: Start difference. First operand has 469 places, 282 transitions, 9585 flow. Second operand 3 states and 845 transitions. [2021-06-10 14:32:01,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 281 transitions, 9585 flow [2021-06-10 14:32:02,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 281 transitions, 1029 flow, removed 4278 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:02,064 INFO L241 Difference]: Finished difference. Result has 470 places, 281 transitions, 1029 flow [2021-06-10 14:32:02,064 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1029, PETRI_PLACES=470, PETRI_TRANSITIONS=281} [2021-06-10 14:32:02,064 INFO L343 CegarLoopForPetriNet]: 469 programPoint places, 1 predicate places. [2021-06-10 14:32:02,064 INFO L480 AbstractCegarLoop]: Abstraction has has 470 places, 281 transitions, 1029 flow [2021-06-10 14:32:02,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:02,064 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:02,065 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:02,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-06-10 14:32:02,065 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1765061603, now seen corresponding path program 1 times [2021-06-10 14:32:02,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:02,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279704101] [2021-06-10 14:32:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:02,087 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:02,089 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:02,102 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:02,102 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:02,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-06-10 14:32:02,103 WARN L342 ceAbstractionStarter]: 93 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:02,103 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 94 thread instances. [2021-06-10 14:32:02,180 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:02,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:02,181 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:02,181 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:02,181 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:02,181 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:02,181 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:02,181 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:02,181 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:02,181 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:02,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 476 places, 287 transitions, 9786 flow [2021-06-10 14:32:02,327 INFO L129 PetriNetUnfolder]: 0/569 cut-off events. [2021-06-10 14:32:02,327 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:02,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 569 events. 0/569 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2121 event pairs, 0 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2021-06-10 14:32:02,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 476 places, 287 transitions, 9786 flow [2021-06-10 14:32:02,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 474 places, 285 transitions, 9782 flow [2021-06-10 14:32:02,331 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:02,331 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:02,331 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:02,331 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:02,332 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:02,332 INFO L82 PathProgramCache]: Analyzing trace with hash 444739, now seen corresponding path program 1 times [2021-06-10 14:32:02,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:02,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358921321] [2021-06-10 14:32:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:02,354 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:02,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:02,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358921321] [2021-06-10 14:32:02,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:02,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:02,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647442718] [2021-06-10 14:32:02,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:02,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:02,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:02,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:02,357 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 287 [2021-06-10 14:32:02,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 285 transitions, 9782 flow. Second operand has 3 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:02,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:02,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 287 [2021-06-10 14:32:02,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:02,470 INFO L129 PetriNetUnfolder]: 0/284 cut-off events. [2021-06-10 14:32:02,470 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:02,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5034 conditions, 284 events. 0/284 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 576 event pairs, 0 based on Foata normal form. 95/379 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2021-06-10 14:32:02,471 INFO L132 encePairwiseOnDemand]: 285/287 looper letters, 0 selfloop transitions, 1 changer transitions 0/284 dead transitions. [2021-06-10 14:32:02,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 284 transitions, 9782 flow [2021-06-10 14:32:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 854 transitions. [2021-06-10 14:32:02,472 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.991869918699187 [2021-06-10 14:32:02,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 854 transitions. [2021-06-10 14:32:02,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 854 transitions. [2021-06-10 14:32:02,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:02,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 854 transitions. [2021-06-10 14:32:02,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:02,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:02,473 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:02,473 INFO L185 Difference]: Start difference. First operand has 474 places, 285 transitions, 9782 flow. Second operand 3 states and 854 transitions. [2021-06-10 14:32:02,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 284 transitions, 9782 flow [2021-06-10 14:32:02,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 284 transitions, 1040 flow, removed 4371 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:02,708 INFO L241 Difference]: Finished difference. Result has 475 places, 284 transitions, 1040 flow [2021-06-10 14:32:02,708 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1040, PETRI_PLACES=475, PETRI_TRANSITIONS=284} [2021-06-10 14:32:02,708 INFO L343 CegarLoopForPetriNet]: 474 programPoint places, 1 predicate places. [2021-06-10 14:32:02,708 INFO L480 AbstractCegarLoop]: Abstraction has has 475 places, 284 transitions, 1040 flow [2021-06-10 14:32:02,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:02,709 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:02,709 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:02,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-06-10 14:32:02,709 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:02,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1280676107, now seen corresponding path program 1 times [2021-06-10 14:32:02,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:02,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18101247] [2021-06-10 14:32:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:02,731 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:02,734 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:02,749 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:02,749 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:02,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-06-10 14:32:02,749 WARN L342 ceAbstractionStarter]: 94 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:02,749 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 95 thread instances. [2021-06-10 14:32:02,824 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:02,824 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:02,824 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:02,824 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:02,824 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:02,824 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:02,825 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:02,825 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:02,825 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:02,825 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:02,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 481 places, 290 transitions, 9985 flow [2021-06-10 14:32:02,975 INFO L129 PetriNetUnfolder]: 0/575 cut-off events. [2021-06-10 14:32:02,975 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:02,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5421 conditions, 575 events. 0/575 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2086 event pairs, 0 based on Foata normal form. 0/479 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2021-06-10 14:32:02,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 481 places, 290 transitions, 9985 flow [2021-06-10 14:32:02,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 479 places, 288 transitions, 9981 flow [2021-06-10 14:32:02,979 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:02,979 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:02,979 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:02,979 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:02,979 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:02,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:02,979 INFO L82 PathProgramCache]: Analyzing trace with hash 454019, now seen corresponding path program 1 times [2021-06-10 14:32:02,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:02,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044427083] [2021-06-10 14:32:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:03,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:03,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:03,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044427083] [2021-06-10 14:32:03,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:03,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:03,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488447986] [2021-06-10 14:32:03,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:03,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:03,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:03,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:03,011 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 290 [2021-06-10 14:32:03,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 288 transitions, 9981 flow. Second operand has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:03,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:03,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 290 [2021-06-10 14:32:03,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:03,127 INFO L129 PetriNetUnfolder]: 0/287 cut-off events. [2021-06-10 14:32:03,127 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:03,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5135 conditions, 287 events. 0/287 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 550 event pairs, 0 based on Foata normal form. 96/383 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2021-06-10 14:32:03,128 INFO L132 encePairwiseOnDemand]: 288/290 looper letters, 0 selfloop transitions, 1 changer transitions 0/287 dead transitions. [2021-06-10 14:32:03,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 287 transitions, 9981 flow [2021-06-10 14:32:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:03,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 863 transitions. [2021-06-10 14:32:03,129 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9919540229885058 [2021-06-10 14:32:03,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 863 transitions. [2021-06-10 14:32:03,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 863 transitions. [2021-06-10 14:32:03,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:03,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 863 transitions. [2021-06-10 14:32:03,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:03,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:03,130 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:03,130 INFO L185 Difference]: Start difference. First operand has 479 places, 288 transitions, 9981 flow. Second operand 3 states and 863 transitions. [2021-06-10 14:32:03,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 287 transitions, 9981 flow [2021-06-10 14:32:03,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 287 transitions, 1051 flow, removed 4465 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:03,365 INFO L241 Difference]: Finished difference. Result has 480 places, 287 transitions, 1051 flow [2021-06-10 14:32:03,365 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1049, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1051, PETRI_PLACES=480, PETRI_TRANSITIONS=287} [2021-06-10 14:32:03,365 INFO L343 CegarLoopForPetriNet]: 479 programPoint places, 1 predicate places. [2021-06-10 14:32:03,365 INFO L480 AbstractCegarLoop]: Abstraction has has 480 places, 287 transitions, 1051 flow [2021-06-10 14:32:03,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:03,365 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:03,365 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:03,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-06-10 14:32:03,365 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:03,366 INFO L82 PathProgramCache]: Analyzing trace with hash -758222019, now seen corresponding path program 1 times [2021-06-10 14:32:03,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:03,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114637554] [2021-06-10 14:32:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:03,439 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:03,441 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:03,454 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:03,455 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:03,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-06-10 14:32:03,455 WARN L342 ceAbstractionStarter]: 95 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:03,455 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 96 thread instances. [2021-06-10 14:32:03,533 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:03,533 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:03,533 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:03,533 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:03,533 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:03,534 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:03,534 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:03,534 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:03,534 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:03,534 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:03,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 486 places, 293 transitions, 10186 flow [2021-06-10 14:32:03,691 INFO L129 PetriNetUnfolder]: 0/581 cut-off events. [2021-06-10 14:32:03,692 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:03,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5526 conditions, 581 events. 0/581 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2153 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 0. Up to 97 conditions per place. [2021-06-10 14:32:03,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 486 places, 293 transitions, 10186 flow [2021-06-10 14:32:03,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 484 places, 291 transitions, 10182 flow [2021-06-10 14:32:03,696 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:03,696 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:03,696 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:03,696 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:03,696 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:03,696 INFO L82 PathProgramCache]: Analyzing trace with hash 463395, now seen corresponding path program 1 times [2021-06-10 14:32:03,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:03,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012183590] [2021-06-10 14:32:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:03,722 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:03,723 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:03,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012183590] [2021-06-10 14:32:03,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:03,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:03,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106765358] [2021-06-10 14:32:03,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:03,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:03,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:03,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:03,727 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 293 [2021-06-10 14:32:03,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 291 transitions, 10182 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:03,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:03,727 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 293 [2021-06-10 14:32:03,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:03,846 INFO L129 PetriNetUnfolder]: 0/290 cut-off events. [2021-06-10 14:32:03,846 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:03,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5237 conditions, 290 events. 0/290 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 598 event pairs, 0 based on Foata normal form. 97/387 useless extension candidates. Maximal degree in co-relation 0. Up to 97 conditions per place. [2021-06-10 14:32:03,847 INFO L132 encePairwiseOnDemand]: 291/293 looper letters, 0 selfloop transitions, 1 changer transitions 0/290 dead transitions. [2021-06-10 14:32:03,847 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 290 transitions, 10182 flow [2021-06-10 14:32:03,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:03,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2021-06-10 14:32:03,848 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9920364050056882 [2021-06-10 14:32:03,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2021-06-10 14:32:03,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2021-06-10 14:32:03,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:03,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2021-06-10 14:32:03,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:03,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:03,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:03,849 INFO L185 Difference]: Start difference. First operand has 484 places, 291 transitions, 10182 flow. Second operand 3 states and 872 transitions. [2021-06-10 14:32:03,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 290 transitions, 10182 flow [2021-06-10 14:32:04,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 290 transitions, 1062 flow, removed 4560 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:04,096 INFO L241 Difference]: Finished difference. Result has 485 places, 290 transitions, 1062 flow [2021-06-10 14:32:04,096 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1062, PETRI_PLACES=485, PETRI_TRANSITIONS=290} [2021-06-10 14:32:04,097 INFO L343 CegarLoopForPetriNet]: 484 programPoint places, 1 predicate places. [2021-06-10 14:32:04,097 INFO L480 AbstractCegarLoop]: Abstraction has has 485 places, 290 transitions, 1062 flow [2021-06-10 14:32:04,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:04,097 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:04,097 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:04,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-06-10 14:32:04,097 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:04,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:04,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1366519480, now seen corresponding path program 1 times [2021-06-10 14:32:04,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:04,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992991589] [2021-06-10 14:32:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:04,123 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:04,125 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:04,141 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:04,141 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:04,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-06-10 14:32:04,141 WARN L342 ceAbstractionStarter]: 96 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:04,141 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 97 thread instances. [2021-06-10 14:32:04,212 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:04,213 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:04,213 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:04,213 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:04,213 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:04,213 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:04,213 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:04,213 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:04,213 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:04,213 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:04,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 491 places, 296 transitions, 10389 flow [2021-06-10 14:32:04,372 INFO L129 PetriNetUnfolder]: 0/587 cut-off events. [2021-06-10 14:32:04,372 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:04,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5632 conditions, 587 events. 0/587 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2145 event pairs, 0 based on Foata normal form. 0/489 useless extension candidates. Maximal degree in co-relation 0. Up to 98 conditions per place. [2021-06-10 14:32:04,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 491 places, 296 transitions, 10389 flow [2021-06-10 14:32:04,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 489 places, 294 transitions, 10385 flow [2021-06-10 14:32:04,376 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:04,376 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:04,376 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:04,376 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:04,376 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:04,376 INFO L82 PathProgramCache]: Analyzing trace with hash 472867, now seen corresponding path program 1 times [2021-06-10 14:32:04,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:04,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771535611] [2021-06-10 14:32:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:04,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:04,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:04,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771535611] [2021-06-10 14:32:04,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:04,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:04,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499242876] [2021-06-10 14:32:04,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:04,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:04,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:04,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:04,408 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 296 [2021-06-10 14:32:04,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 294 transitions, 10385 flow. Second operand has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:04,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:04,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 296 [2021-06-10 14:32:04,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:04,533 INFO L129 PetriNetUnfolder]: 0/293 cut-off events. [2021-06-10 14:32:04,533 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:04,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5340 conditions, 293 events. 0/293 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 610 event pairs, 0 based on Foata normal form. 98/391 useless extension candidates. Maximal degree in co-relation 0. Up to 98 conditions per place. [2021-06-10 14:32:04,534 INFO L132 encePairwiseOnDemand]: 294/296 looper letters, 0 selfloop transitions, 1 changer transitions 0/293 dead transitions. [2021-06-10 14:32:04,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 293 transitions, 10385 flow [2021-06-10 14:32:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 881 transitions. [2021-06-10 14:32:04,535 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9921171171171171 [2021-06-10 14:32:04,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 881 transitions. [2021-06-10 14:32:04,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 881 transitions. [2021-06-10 14:32:04,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:04,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 881 transitions. [2021-06-10 14:32:04,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:04,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:04,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:04,536 INFO L185 Difference]: Start difference. First operand has 489 places, 294 transitions, 10385 flow. Second operand 3 states and 881 transitions. [2021-06-10 14:32:04,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 293 transitions, 10385 flow [2021-06-10 14:32:04,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 293 transitions, 1073 flow, removed 4656 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:04,776 INFO L241 Difference]: Finished difference. Result has 490 places, 293 transitions, 1073 flow [2021-06-10 14:32:04,777 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1073, PETRI_PLACES=490, PETRI_TRANSITIONS=293} [2021-06-10 14:32:04,777 INFO L343 CegarLoopForPetriNet]: 489 programPoint places, 1 predicate places. [2021-06-10 14:32:04,777 INFO L480 AbstractCegarLoop]: Abstraction has has 490 places, 293 transitions, 1073 flow [2021-06-10 14:32:04,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:04,777 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:04,777 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:04,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-06-10 14:32:04,777 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:04,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1935852969, now seen corresponding path program 1 times [2021-06-10 14:32:04,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:04,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626327744] [2021-06-10 14:32:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:04,803 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:04,805 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:04,821 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:04,821 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:04,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2021-06-10 14:32:04,821 WARN L342 ceAbstractionStarter]: 97 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:04,821 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 98 thread instances. [2021-06-10 14:32:04,896 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:04,896 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:04,897 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:04,897 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:04,897 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:04,897 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:04,897 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:04,897 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:04,897 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:04,897 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:04,899 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 496 places, 299 transitions, 10594 flow [2021-06-10 14:32:05,060 INFO L129 PetriNetUnfolder]: 0/593 cut-off events. [2021-06-10 14:32:05,060 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:05,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5739 conditions, 593 events. 0/593 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2193 event pairs, 0 based on Foata normal form. 0/494 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2021-06-10 14:32:05,060 INFO L82 GeneralOperation]: Start removeDead. Operand has 496 places, 299 transitions, 10594 flow [2021-06-10 14:32:05,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 494 places, 297 transitions, 10590 flow [2021-06-10 14:32:05,064 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:05,064 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:05,064 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:05,064 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:05,064 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:05,065 INFO L82 PathProgramCache]: Analyzing trace with hash 482435, now seen corresponding path program 1 times [2021-06-10 14:32:05,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:05,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439606021] [2021-06-10 14:32:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:05,090 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:05,090 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:05,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439606021] [2021-06-10 14:32:05,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:05,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:05,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814335599] [2021-06-10 14:32:05,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:05,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:05,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:05,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:05,093 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 299 [2021-06-10 14:32:05,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 297 transitions, 10590 flow. Second operand has 3 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:05,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:05,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 299 [2021-06-10 14:32:05,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:05,219 INFO L129 PetriNetUnfolder]: 0/296 cut-off events. [2021-06-10 14:32:05,219 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:05,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5444 conditions, 296 events. 0/296 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 614 event pairs, 0 based on Foata normal form. 99/395 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2021-06-10 14:32:05,220 INFO L132 encePairwiseOnDemand]: 297/299 looper letters, 0 selfloop transitions, 1 changer transitions 0/296 dead transitions. [2021-06-10 14:32:05,220 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 296 transitions, 10590 flow [2021-06-10 14:32:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2021-06-10 14:32:05,220 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.992196209587514 [2021-06-10 14:32:05,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2021-06-10 14:32:05,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2021-06-10 14:32:05,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:05,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2021-06-10 14:32:05,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:05,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:05,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:05,222 INFO L185 Difference]: Start difference. First operand has 494 places, 297 transitions, 10590 flow. Second operand 3 states and 890 transitions. [2021-06-10 14:32:05,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 296 transitions, 10590 flow [2021-06-10 14:32:05,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 296 transitions, 1084 flow, removed 4753 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:05,465 INFO L241 Difference]: Finished difference. Result has 495 places, 296 transitions, 1084 flow [2021-06-10 14:32:05,465 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1084, PETRI_PLACES=495, PETRI_TRANSITIONS=296} [2021-06-10 14:32:05,465 INFO L343 CegarLoopForPetriNet]: 494 programPoint places, 1 predicate places. [2021-06-10 14:32:05,465 INFO L480 AbstractCegarLoop]: Abstraction has has 495 places, 296 transitions, 1084 flow [2021-06-10 14:32:05,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:05,465 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:05,465 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:05,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2021-06-10 14:32:05,465 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1806427707, now seen corresponding path program 1 times [2021-06-10 14:32:05,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:05,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088398411] [2021-06-10 14:32:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:05,493 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:05,496 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:05,512 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:05,512 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:05,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2021-06-10 14:32:05,512 WARN L342 ceAbstractionStarter]: 98 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:05,512 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 99 thread instances. [2021-06-10 14:32:05,594 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:05,594 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:05,595 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:05,595 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:05,595 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:05,595 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:05,595 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:05,595 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:05,595 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:05,595 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:05,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 501 places, 302 transitions, 10801 flow [2021-06-10 14:32:05,838 INFO L129 PetriNetUnfolder]: 0/599 cut-off events. [2021-06-10 14:32:05,838 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:05,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5847 conditions, 599 events. 0/599 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2209 event pairs, 0 based on Foata normal form. 0/499 useless extension candidates. Maximal degree in co-relation 0. Up to 100 conditions per place. [2021-06-10 14:32:05,839 INFO L82 GeneralOperation]: Start removeDead. Operand has 501 places, 302 transitions, 10801 flow [2021-06-10 14:32:05,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 499 places, 300 transitions, 10797 flow [2021-06-10 14:32:05,843 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:05,843 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:05,843 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:05,843 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:05,844 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:05,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:05,844 INFO L82 PathProgramCache]: Analyzing trace with hash 492099, now seen corresponding path program 1 times [2021-06-10 14:32:05,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:05,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211294830] [2021-06-10 14:32:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:05,871 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:05,871 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:05,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211294830] [2021-06-10 14:32:05,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:05,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:05,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070466746] [2021-06-10 14:32:05,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:05,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:05,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:05,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:05,875 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 302 [2021-06-10 14:32:05,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 300 transitions, 10797 flow. Second operand has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:05,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:05,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 302 [2021-06-10 14:32:05,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:06,026 INFO L129 PetriNetUnfolder]: 0/299 cut-off events. [2021-06-10 14:32:06,026 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:06,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5549 conditions, 299 events. 0/299 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 575 event pairs, 0 based on Foata normal form. 100/399 useless extension candidates. Maximal degree in co-relation 0. Up to 100 conditions per place. [2021-06-10 14:32:06,027 INFO L132 encePairwiseOnDemand]: 300/302 looper letters, 0 selfloop transitions, 1 changer transitions 0/299 dead transitions. [2021-06-10 14:32:06,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 299 transitions, 10797 flow [2021-06-10 14:32:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 899 transitions. [2021-06-10 14:32:06,028 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9922737306843267 [2021-06-10 14:32:06,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 899 transitions. [2021-06-10 14:32:06,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 899 transitions. [2021-06-10 14:32:06,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:06,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 899 transitions. [2021-06-10 14:32:06,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:06,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:06,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:06,030 INFO L185 Difference]: Start difference. First operand has 499 places, 300 transitions, 10797 flow. Second operand 3 states and 899 transitions. [2021-06-10 14:32:06,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 299 transitions, 10797 flow [2021-06-10 14:32:06,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 299 transitions, 1095 flow, removed 4851 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:06,286 INFO L241 Difference]: Finished difference. Result has 500 places, 299 transitions, 1095 flow [2021-06-10 14:32:06,286 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1095, PETRI_PLACES=500, PETRI_TRANSITIONS=299} [2021-06-10 14:32:06,286 INFO L343 CegarLoopForPetriNet]: 499 programPoint places, 1 predicate places. [2021-06-10 14:32:06,286 INFO L480 AbstractCegarLoop]: Abstraction has has 500 places, 299 transitions, 1095 flow [2021-06-10 14:32:06,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:06,286 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:06,287 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:06,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2021-06-10 14:32:06,287 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:06,287 INFO L82 PathProgramCache]: Analyzing trace with hash 890119905, now seen corresponding path program 1 times [2021-06-10 14:32:06,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:06,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871027802] [2021-06-10 14:32:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:06,314 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:06,316 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:06,335 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:06,335 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:06,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-06-10 14:32:06,336 WARN L342 ceAbstractionStarter]: 99 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:06,336 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 100 thread instances. [2021-06-10 14:32:06,422 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:06,422 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:06,422 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:06,422 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:06,423 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:06,423 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:06,423 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:06,423 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:06,423 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:06,423 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:06,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 506 places, 305 transitions, 11010 flow [2021-06-10 14:32:06,614 INFO L129 PetriNetUnfolder]: 0/605 cut-off events. [2021-06-10 14:32:06,614 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:06,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5956 conditions, 605 events. 0/605 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2221 event pairs, 0 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 0. Up to 101 conditions per place. [2021-06-10 14:32:06,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 506 places, 305 transitions, 11010 flow [2021-06-10 14:32:06,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 504 places, 303 transitions, 11006 flow [2021-06-10 14:32:06,618 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:06,618 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:06,618 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:06,618 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:06,618 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:06,618 INFO L82 PathProgramCache]: Analyzing trace with hash 501859, now seen corresponding path program 1 times [2021-06-10 14:32:06,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:06,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657762505] [2021-06-10 14:32:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:06,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:06,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:06,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657762505] [2021-06-10 14:32:06,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:06,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:06,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500522914] [2021-06-10 14:32:06,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:06,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:06,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:06,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:06,646 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 305 [2021-06-10 14:32:06,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 303 transitions, 11006 flow. Second operand has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:06,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:06,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 305 [2021-06-10 14:32:06,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:06,779 INFO L129 PetriNetUnfolder]: 0/302 cut-off events. [2021-06-10 14:32:06,779 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:06,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5655 conditions, 302 events. 0/302 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 623 event pairs, 0 based on Foata normal form. 101/403 useless extension candidates. Maximal degree in co-relation 0. Up to 101 conditions per place. [2021-06-10 14:32:06,780 INFO L132 encePairwiseOnDemand]: 303/305 looper letters, 0 selfloop transitions, 1 changer transitions 0/302 dead transitions. [2021-06-10 14:32:06,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 302 transitions, 11006 flow [2021-06-10 14:32:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2021-06-10 14:32:06,781 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9923497267759562 [2021-06-10 14:32:06,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2021-06-10 14:32:06,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2021-06-10 14:32:06,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:06,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2021-06-10 14:32:06,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:06,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:06,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:06,782 INFO L185 Difference]: Start difference. First operand has 504 places, 303 transitions, 11006 flow. Second operand 3 states and 908 transitions. [2021-06-10 14:32:06,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 302 transitions, 11006 flow [2021-06-10 14:32:07,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 302 transitions, 1106 flow, removed 4950 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:07,033 INFO L241 Difference]: Finished difference. Result has 505 places, 302 transitions, 1106 flow [2021-06-10 14:32:07,033 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1106, PETRI_PLACES=505, PETRI_TRANSITIONS=302} [2021-06-10 14:32:07,033 INFO L343 CegarLoopForPetriNet]: 504 programPoint places, 1 predicate places. [2021-06-10 14:32:07,033 INFO L480 AbstractCegarLoop]: Abstraction has has 505 places, 302 transitions, 1106 flow [2021-06-10 14:32:07,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:07,034 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:07,034 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:07,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2021-06-10 14:32:07,034 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1232130558, now seen corresponding path program 1 times [2021-06-10 14:32:07,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:07,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427542523] [2021-06-10 14:32:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:07,058 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:07,061 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:07,078 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:07,078 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:07,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2021-06-10 14:32:07,078 WARN L342 ceAbstractionStarter]: 100 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:07,078 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 101 thread instances. [2021-06-10 14:32:07,155 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:07,155 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:07,156 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:07,156 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:07,156 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:07,156 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:07,156 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:07,156 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:07,156 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:07,156 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:07,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 511 places, 308 transitions, 11221 flow [2021-06-10 14:32:07,333 INFO L129 PetriNetUnfolder]: 0/611 cut-off events. [2021-06-10 14:32:07,333 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:07,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6066 conditions, 611 events. 0/611 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2255 event pairs, 0 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2021-06-10 14:32:07,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 511 places, 308 transitions, 11221 flow [2021-06-10 14:32:07,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 509 places, 306 transitions, 11217 flow [2021-06-10 14:32:07,338 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:07,338 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:07,338 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:07,338 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:07,338 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:07,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:07,338 INFO L82 PathProgramCache]: Analyzing trace with hash 511715, now seen corresponding path program 1 times [2021-06-10 14:32:07,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:07,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608477281] [2021-06-10 14:32:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:07,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:07,363 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:07,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608477281] [2021-06-10 14:32:07,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:07,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:07,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678570573] [2021-06-10 14:32:07,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:07,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:07,365 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 308 [2021-06-10 14:32:07,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 306 transitions, 11217 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:07,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:07,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 308 [2021-06-10 14:32:07,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:07,503 INFO L129 PetriNetUnfolder]: 0/305 cut-off events. [2021-06-10 14:32:07,503 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:07,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5762 conditions, 305 events. 0/305 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 578 event pairs, 0 based on Foata normal form. 102/407 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2021-06-10 14:32:07,504 INFO L132 encePairwiseOnDemand]: 306/308 looper letters, 0 selfloop transitions, 1 changer transitions 0/305 dead transitions. [2021-06-10 14:32:07,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 305 transitions, 11217 flow [2021-06-10 14:32:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 917 transitions. [2021-06-10 14:32:07,505 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9924242424242424 [2021-06-10 14:32:07,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 917 transitions. [2021-06-10 14:32:07,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 917 transitions. [2021-06-10 14:32:07,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:07,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 917 transitions. [2021-06-10 14:32:07,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:07,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:07,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:07,506 INFO L185 Difference]: Start difference. First operand has 509 places, 306 transitions, 11217 flow. Second operand 3 states and 917 transitions. [2021-06-10 14:32:07,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 305 transitions, 11217 flow [2021-06-10 14:32:07,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 305 transitions, 1117 flow, removed 5050 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:07,764 INFO L241 Difference]: Finished difference. Result has 510 places, 305 transitions, 1117 flow [2021-06-10 14:32:07,764 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1117, PETRI_PLACES=510, PETRI_TRANSITIONS=305} [2021-06-10 14:32:07,764 INFO L343 CegarLoopForPetriNet]: 509 programPoint places, 1 predicate places. [2021-06-10 14:32:07,764 INFO L480 AbstractCegarLoop]: Abstraction has has 510 places, 305 transitions, 1117 flow [2021-06-10 14:32:07,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:07,765 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:07,765 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:07,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2021-06-10 14:32:07,765 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:07,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:07,765 INFO L82 PathProgramCache]: Analyzing trace with hash 162839141, now seen corresponding path program 1 times [2021-06-10 14:32:07,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:07,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628089529] [2021-06-10 14:32:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:07,790 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:07,792 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:07,810 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:07,811 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:07,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-06-10 14:32:07,811 WARN L342 ceAbstractionStarter]: 101 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:07,811 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 102 thread instances. [2021-06-10 14:32:07,891 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:07,891 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:07,891 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:07,891 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:07,891 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:07,891 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:07,892 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:07,892 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:07,892 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:07,892 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:07,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 516 places, 311 transitions, 11434 flow [2021-06-10 14:32:08,072 INFO L129 PetriNetUnfolder]: 0/617 cut-off events. [2021-06-10 14:32:08,073 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:08,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6177 conditions, 617 events. 0/617 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2276 event pairs, 0 based on Foata normal form. 0/514 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2021-06-10 14:32:08,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 516 places, 311 transitions, 11434 flow [2021-06-10 14:32:08,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 514 places, 309 transitions, 11430 flow [2021-06-10 14:32:08,077 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:08,077 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:08,077 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:08,077 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:08,077 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:08,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:08,078 INFO L82 PathProgramCache]: Analyzing trace with hash 521667, now seen corresponding path program 1 times [2021-06-10 14:32:08,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:08,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227177170] [2021-06-10 14:32:08,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:08,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:08,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:08,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227177170] [2021-06-10 14:32:08,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:08,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:08,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114395803] [2021-06-10 14:32:08,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:08,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:08,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:08,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:08,105 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 311 [2021-06-10 14:32:08,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 309 transitions, 11430 flow. Second operand has 3 states, 3 states have (on average 308.6666666666667) internal successors, (926), 3 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:08,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:08,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 311 [2021-06-10 14:32:08,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:08,246 INFO L129 PetriNetUnfolder]: 0/308 cut-off events. [2021-06-10 14:32:08,246 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:08,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 308 events. 0/308 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 604 event pairs, 0 based on Foata normal form. 103/411 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2021-06-10 14:32:08,247 INFO L132 encePairwiseOnDemand]: 309/311 looper letters, 0 selfloop transitions, 1 changer transitions 0/308 dead transitions. [2021-06-10 14:32:08,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 308 transitions, 11430 flow [2021-06-10 14:32:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 926 transitions. [2021-06-10 14:32:08,247 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.992497320471597 [2021-06-10 14:32:08,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 926 transitions. [2021-06-10 14:32:08,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 926 transitions. [2021-06-10 14:32:08,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:08,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 926 transitions. [2021-06-10 14:32:08,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.6666666666667) internal successors, (926), 3 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:08,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:08,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:08,249 INFO L185 Difference]: Start difference. First operand has 514 places, 309 transitions, 11430 flow. Second operand 3 states and 926 transitions. [2021-06-10 14:32:08,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 308 transitions, 11430 flow [2021-06-10 14:32:08,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 308 transitions, 1128 flow, removed 5151 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:08,590 INFO L241 Difference]: Finished difference. Result has 515 places, 308 transitions, 1128 flow [2021-06-10 14:32:08,591 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1128, PETRI_PLACES=515, PETRI_TRANSITIONS=308} [2021-06-10 14:32:08,591 INFO L343 CegarLoopForPetriNet]: 514 programPoint places, 1 predicate places. [2021-06-10 14:32:08,591 INFO L480 AbstractCegarLoop]: Abstraction has has 515 places, 308 transitions, 1128 flow [2021-06-10 14:32:08,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 308.6666666666667) internal successors, (926), 3 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:08,591 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:08,591 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:08,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-06-10 14:32:08,591 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:08,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1879511423, now seen corresponding path program 1 times [2021-06-10 14:32:08,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:08,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987387779] [2021-06-10 14:32:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:08,616 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:08,618 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:08,635 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:08,635 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:08,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-06-10 14:32:08,635 WARN L342 ceAbstractionStarter]: 102 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:08,635 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 103 thread instances. [2021-06-10 14:32:08,711 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:08,712 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:08,712 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:08,712 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:08,712 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:08,712 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:08,712 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:08,712 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:08,712 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:08,712 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:08,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 521 places, 314 transitions, 11649 flow [2021-06-10 14:32:08,896 INFO L129 PetriNetUnfolder]: 0/623 cut-off events. [2021-06-10 14:32:08,896 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:08,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6289 conditions, 623 events. 0/623 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2335 event pairs, 0 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 0. Up to 104 conditions per place. [2021-06-10 14:32:08,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 521 places, 314 transitions, 11649 flow [2021-06-10 14:32:08,900 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 519 places, 312 transitions, 11645 flow [2021-06-10 14:32:08,901 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:08,901 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:08,901 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:08,901 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:08,901 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:08,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:08,901 INFO L82 PathProgramCache]: Analyzing trace with hash 531715, now seen corresponding path program 1 times [2021-06-10 14:32:08,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:08,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228909985] [2021-06-10 14:32:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:08,926 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:08,926 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:08,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228909985] [2021-06-10 14:32:08,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:08,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:08,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520319491] [2021-06-10 14:32:08,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:08,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:08,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:08,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:08,929 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 314 [2021-06-10 14:32:08,929 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 312 transitions, 11645 flow. Second operand has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:08,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:08,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 314 [2021-06-10 14:32:08,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:09,073 INFO L129 PetriNetUnfolder]: 0/311 cut-off events. [2021-06-10 14:32:09,073 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:09,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5979 conditions, 311 events. 0/311 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 621 event pairs, 0 based on Foata normal form. 104/415 useless extension candidates. Maximal degree in co-relation 0. Up to 104 conditions per place. [2021-06-10 14:32:09,074 INFO L132 encePairwiseOnDemand]: 312/314 looper letters, 0 selfloop transitions, 1 changer transitions 0/311 dead transitions. [2021-06-10 14:32:09,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 311 transitions, 11645 flow [2021-06-10 14:32:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 935 transitions. [2021-06-10 14:32:09,075 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9925690021231423 [2021-06-10 14:32:09,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 935 transitions. [2021-06-10 14:32:09,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 935 transitions. [2021-06-10 14:32:09,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:09,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 935 transitions. [2021-06-10 14:32:09,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:09,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:09,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:09,076 INFO L185 Difference]: Start difference. First operand has 519 places, 312 transitions, 11645 flow. Second operand 3 states and 935 transitions. [2021-06-10 14:32:09,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 311 transitions, 11645 flow [2021-06-10 14:32:09,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 311 transitions, 1139 flow, removed 5253 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:09,340 INFO L241 Difference]: Finished difference. Result has 520 places, 311 transitions, 1139 flow [2021-06-10 14:32:09,340 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1139, PETRI_PLACES=520, PETRI_TRANSITIONS=311} [2021-06-10 14:32:09,340 INFO L343 CegarLoopForPetriNet]: 519 programPoint places, 1 predicate places. [2021-06-10 14:32:09,340 INFO L480 AbstractCegarLoop]: Abstraction has has 520 places, 311 transitions, 1139 flow [2021-06-10 14:32:09,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:09,340 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:09,340 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:09,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-06-10 14:32:09,340 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:09,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:09,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1613292469, now seen corresponding path program 1 times [2021-06-10 14:32:09,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:09,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673585341] [2021-06-10 14:32:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:09,368 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:09,370 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:09,387 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:09,388 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:09,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-06-10 14:32:09,388 WARN L342 ceAbstractionStarter]: 103 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:09,388 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 104 thread instances. [2021-06-10 14:32:09,464 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:09,465 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:09,465 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:09,465 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:09,465 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:09,465 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:09,465 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:09,465 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:09,465 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:09,465 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:09,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 526 places, 317 transitions, 11866 flow [2021-06-10 14:32:09,654 INFO L129 PetriNetUnfolder]: 0/629 cut-off events. [2021-06-10 14:32:09,654 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:09,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6402 conditions, 629 events. 0/629 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2308 event pairs, 0 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 0. Up to 105 conditions per place. [2021-06-10 14:32:09,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 526 places, 317 transitions, 11866 flow [2021-06-10 14:32:09,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 524 places, 315 transitions, 11862 flow [2021-06-10 14:32:09,659 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:09,659 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:09,659 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:09,659 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:09,659 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:09,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:09,659 INFO L82 PathProgramCache]: Analyzing trace with hash 541859, now seen corresponding path program 1 times [2021-06-10 14:32:09,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:09,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702567356] [2021-06-10 14:32:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:09,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:09,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:09,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702567356] [2021-06-10 14:32:09,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:09,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:09,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478082406] [2021-06-10 14:32:09,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:09,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:09,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:09,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:09,688 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 317 [2021-06-10 14:32:09,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 315 transitions, 11862 flow. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:09,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:09,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 317 [2021-06-10 14:32:09,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:09,833 INFO L129 PetriNetUnfolder]: 0/314 cut-off events. [2021-06-10 14:32:09,833 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:09,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6089 conditions, 314 events. 0/314 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 566 event pairs, 0 based on Foata normal form. 105/419 useless extension candidates. Maximal degree in co-relation 0. Up to 105 conditions per place. [2021-06-10 14:32:09,834 INFO L132 encePairwiseOnDemand]: 315/317 looper letters, 0 selfloop transitions, 1 changer transitions 0/314 dead transitions. [2021-06-10 14:32:09,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 314 transitions, 11862 flow [2021-06-10 14:32:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 944 transitions. [2021-06-10 14:32:09,835 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9926393270241851 [2021-06-10 14:32:09,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 944 transitions. [2021-06-10 14:32:09,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 944 transitions. [2021-06-10 14:32:09,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:09,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 944 transitions. [2021-06-10 14:32:09,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:09,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:09,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:09,836 INFO L185 Difference]: Start difference. First operand has 524 places, 315 transitions, 11862 flow. Second operand 3 states and 944 transitions. [2021-06-10 14:32:09,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 314 transitions, 11862 flow [2021-06-10 14:32:10,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 314 transitions, 1150 flow, removed 5356 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:10,120 INFO L241 Difference]: Finished difference. Result has 525 places, 314 transitions, 1150 flow [2021-06-10 14:32:10,120 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1150, PETRI_PLACES=525, PETRI_TRANSITIONS=314} [2021-06-10 14:32:10,120 INFO L343 CegarLoopForPetriNet]: 524 programPoint places, 1 predicate places. [2021-06-10 14:32:10,120 INFO L480 AbstractCegarLoop]: Abstraction has has 525 places, 314 transitions, 1150 flow [2021-06-10 14:32:10,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:10,120 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:10,121 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:10,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-06-10 14:32:10,121 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:10,121 INFO L82 PathProgramCache]: Analyzing trace with hash 235190340, now seen corresponding path program 1 times [2021-06-10 14:32:10,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:10,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191608998] [2021-06-10 14:32:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:10,148 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:10,150 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:10,168 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:10,169 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:10,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-06-10 14:32:10,169 WARN L342 ceAbstractionStarter]: 104 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:10,169 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 105 thread instances. [2021-06-10 14:32:10,245 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:10,246 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:10,246 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:10,246 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:10,246 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:10,246 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:10,246 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:10,246 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:10,246 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:10,246 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:10,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 531 places, 320 transitions, 12085 flow [2021-06-10 14:32:10,439 INFO L129 PetriNetUnfolder]: 0/635 cut-off events. [2021-06-10 14:32:10,439 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:10,439 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6516 conditions, 635 events. 0/635 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2362 event pairs, 0 based on Foata normal form. 0/529 useless extension candidates. Maximal degree in co-relation 0. Up to 106 conditions per place. [2021-06-10 14:32:10,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 531 places, 320 transitions, 12085 flow [2021-06-10 14:32:10,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 529 places, 318 transitions, 12081 flow [2021-06-10 14:32:10,443 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:10,444 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:10,444 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:10,444 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:10,444 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:10,444 INFO L82 PathProgramCache]: Analyzing trace with hash 552099, now seen corresponding path program 1 times [2021-06-10 14:32:10,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:10,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359904034] [2021-06-10 14:32:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:10,470 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:10,470 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:10,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359904034] [2021-06-10 14:32:10,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:10,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:10,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665938337] [2021-06-10 14:32:10,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:10,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:10,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:10,473 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 320 [2021-06-10 14:32:10,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 318 transitions, 12081 flow. Second operand has 3 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:10,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:10,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 320 [2021-06-10 14:32:10,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:10,625 INFO L129 PetriNetUnfolder]: 0/317 cut-off events. [2021-06-10 14:32:10,625 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:10,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6200 conditions, 317 events. 0/317 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 626 event pairs, 0 based on Foata normal form. 106/423 useless extension candidates. Maximal degree in co-relation 0. Up to 106 conditions per place. [2021-06-10 14:32:10,626 INFO L132 encePairwiseOnDemand]: 318/320 looper letters, 0 selfloop transitions, 1 changer transitions 0/317 dead transitions. [2021-06-10 14:32:10,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 317 transitions, 12081 flow [2021-06-10 14:32:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 953 transitions. [2021-06-10 14:32:10,627 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9927083333333333 [2021-06-10 14:32:10,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 953 transitions. [2021-06-10 14:32:10,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 953 transitions. [2021-06-10 14:32:10,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:10,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 953 transitions. [2021-06-10 14:32:10,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:10,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:10,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:10,628 INFO L185 Difference]: Start difference. First operand has 529 places, 318 transitions, 12081 flow. Second operand 3 states and 953 transitions. [2021-06-10 14:32:10,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 317 transitions, 12081 flow [2021-06-10 14:32:10,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 317 transitions, 1161 flow, removed 5460 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:10,921 INFO L241 Difference]: Finished difference. Result has 530 places, 317 transitions, 1161 flow [2021-06-10 14:32:10,921 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1161, PETRI_PLACES=530, PETRI_TRANSITIONS=317} [2021-06-10 14:32:10,921 INFO L343 CegarLoopForPetriNet]: 529 programPoint places, 1 predicate places. [2021-06-10 14:32:10,921 INFO L480 AbstractCegarLoop]: Abstraction has has 530 places, 317 transitions, 1161 flow [2021-06-10 14:32:10,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:10,922 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:10,922 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:10,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2021-06-10 14:32:10,922 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:10,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1706772049, now seen corresponding path program 1 times [2021-06-10 14:32:10,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:10,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188246206] [2021-06-10 14:32:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:10,949 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:10,951 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:10,968 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:10,968 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:10,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2021-06-10 14:32:10,968 WARN L342 ceAbstractionStarter]: 105 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:10,968 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 106 thread instances. [2021-06-10 14:32:11,059 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:11,059 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:11,059 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:11,059 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:11,059 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:11,059 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:11,059 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:11,059 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:11,059 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:11,059 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:11,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 536 places, 323 transitions, 12306 flow [2021-06-10 14:32:11,308 INFO L129 PetriNetUnfolder]: 0/641 cut-off events. [2021-06-10 14:32:11,308 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:11,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6631 conditions, 641 events. 0/641 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2438 event pairs, 0 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2021-06-10 14:32:11,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 536 places, 323 transitions, 12306 flow [2021-06-10 14:32:11,312 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 534 places, 321 transitions, 12302 flow [2021-06-10 14:32:11,312 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:11,312 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:11,313 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:11,313 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:11,313 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:11,313 INFO L82 PathProgramCache]: Analyzing trace with hash 562435, now seen corresponding path program 1 times [2021-06-10 14:32:11,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:11,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472715877] [2021-06-10 14:32:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:11,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:11,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:11,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472715877] [2021-06-10 14:32:11,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:11,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:11,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120509376] [2021-06-10 14:32:11,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:11,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:11,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:11,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:11,343 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 323 [2021-06-10 14:32:11,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 321 transitions, 12302 flow. Second operand has 3 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:11,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:11,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 323 [2021-06-10 14:32:11,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:11,494 INFO L129 PetriNetUnfolder]: 0/320 cut-off events. [2021-06-10 14:32:11,494 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:11,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6312 conditions, 320 events. 0/320 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 658 event pairs, 0 based on Foata normal form. 107/427 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2021-06-10 14:32:11,495 INFO L132 encePairwiseOnDemand]: 321/323 looper letters, 0 selfloop transitions, 1 changer transitions 0/320 dead transitions. [2021-06-10 14:32:11,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 320 transitions, 12302 flow [2021-06-10 14:32:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:11,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2021-06-10 14:32:11,495 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9927760577915377 [2021-06-10 14:32:11,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2021-06-10 14:32:11,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2021-06-10 14:32:11,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:11,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2021-06-10 14:32:11,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:11,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:11,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:11,497 INFO L185 Difference]: Start difference. First operand has 534 places, 321 transitions, 12302 flow. Second operand 3 states and 962 transitions. [2021-06-10 14:32:11,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 320 transitions, 12302 flow [2021-06-10 14:32:11,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 320 transitions, 1172 flow, removed 5565 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:11,802 INFO L241 Difference]: Finished difference. Result has 535 places, 320 transitions, 1172 flow [2021-06-10 14:32:11,802 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1172, PETRI_PLACES=535, PETRI_TRANSITIONS=320} [2021-06-10 14:32:11,803 INFO L343 CegarLoopForPetriNet]: 534 programPoint places, 1 predicate places. [2021-06-10 14:32:11,803 INFO L480 AbstractCegarLoop]: Abstraction has has 535 places, 320 transitions, 1172 flow [2021-06-10 14:32:11,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:11,803 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:11,803 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:11,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2021-06-10 14:32:11,803 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:11,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:11,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1296985031, now seen corresponding path program 1 times [2021-06-10 14:32:11,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:11,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878863081] [2021-06-10 14:32:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:11,830 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:11,832 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:11,850 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:11,851 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:11,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2021-06-10 14:32:11,851 WARN L342 ceAbstractionStarter]: 106 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:11,851 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 107 thread instances. [2021-06-10 14:32:11,926 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:11,927 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:11,927 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:11,927 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:11,927 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:11,927 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:11,927 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:11,927 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:11,927 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:11,927 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:11,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 541 places, 326 transitions, 12529 flow [2021-06-10 14:32:12,129 INFO L129 PetriNetUnfolder]: 0/647 cut-off events. [2021-06-10 14:32:12,130 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:12,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6747 conditions, 647 events. 0/647 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2388 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2021-06-10 14:32:12,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 541 places, 326 transitions, 12529 flow [2021-06-10 14:32:12,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 539 places, 324 transitions, 12525 flow [2021-06-10 14:32:12,135 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:12,135 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:12,135 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:12,135 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:12,135 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:12,135 INFO L82 PathProgramCache]: Analyzing trace with hash 572867, now seen corresponding path program 1 times [2021-06-10 14:32:12,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:12,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130885381] [2021-06-10 14:32:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:12,162 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:12,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:12,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130885381] [2021-06-10 14:32:12,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:12,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:12,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113109576] [2021-06-10 14:32:12,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:12,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:12,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:12,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:12,165 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 326 [2021-06-10 14:32:12,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 324 transitions, 12525 flow. Second operand has 3 states, 3 states have (on average 323.6666666666667) internal successors, (971), 3 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:12,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:12,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 326 [2021-06-10 14:32:12,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:12,323 INFO L129 PetriNetUnfolder]: 0/323 cut-off events. [2021-06-10 14:32:12,323 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:12,323 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6425 conditions, 323 events. 0/323 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 647 event pairs, 0 based on Foata normal form. 108/431 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2021-06-10 14:32:12,324 INFO L132 encePairwiseOnDemand]: 324/326 looper letters, 0 selfloop transitions, 1 changer transitions 0/323 dead transitions. [2021-06-10 14:32:12,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 323 transitions, 12525 flow [2021-06-10 14:32:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 971 transitions. [2021-06-10 14:32:12,325 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9928425357873211 [2021-06-10 14:32:12,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 971 transitions. [2021-06-10 14:32:12,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 971 transitions. [2021-06-10 14:32:12,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:12,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 971 transitions. [2021-06-10 14:32:12,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.6666666666667) internal successors, (971), 3 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:12,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:12,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:12,326 INFO L185 Difference]: Start difference. First operand has 539 places, 324 transitions, 12525 flow. Second operand 3 states and 971 transitions. [2021-06-10 14:32:12,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 323 transitions, 12525 flow [2021-06-10 14:32:12,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 323 transitions, 1183 flow, removed 5671 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:12,647 INFO L241 Difference]: Finished difference. Result has 540 places, 323 transitions, 1183 flow [2021-06-10 14:32:12,647 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1183, PETRI_PLACES=540, PETRI_TRANSITIONS=323} [2021-06-10 14:32:12,647 INFO L343 CegarLoopForPetriNet]: 539 programPoint places, 1 predicate places. [2021-06-10 14:32:12,647 INFO L480 AbstractCegarLoop]: Abstraction has has 540 places, 323 transitions, 1183 flow [2021-06-10 14:32:12,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 323.6666666666667) internal successors, (971), 3 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:12,647 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:12,648 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:12,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2021-06-10 14:32:12,648 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:12,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1043675719, now seen corresponding path program 1 times [2021-06-10 14:32:12,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:12,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36268476] [2021-06-10 14:32:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:12,676 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:12,678 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:12,698 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:12,698 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:12,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2021-06-10 14:32:12,698 WARN L342 ceAbstractionStarter]: 107 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:12,698 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 108 thread instances. [2021-06-10 14:32:12,781 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:12,782 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:12,782 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:12,782 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:12,782 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:12,782 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:12,782 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:12,782 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:12,782 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:12,782 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:12,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 546 places, 329 transitions, 12754 flow [2021-06-10 14:32:12,988 INFO L129 PetriNetUnfolder]: 0/653 cut-off events. [2021-06-10 14:32:12,988 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:12,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6864 conditions, 653 events. 0/653 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2397 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 0. Up to 109 conditions per place. [2021-06-10 14:32:12,988 INFO L82 GeneralOperation]: Start removeDead. Operand has 546 places, 329 transitions, 12754 flow [2021-06-10 14:32:12,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 544 places, 327 transitions, 12750 flow [2021-06-10 14:32:12,993 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:12,993 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:12,993 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:12,993 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:12,993 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 583395, now seen corresponding path program 1 times [2021-06-10 14:32:12,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:12,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837519716] [2021-06-10 14:32:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:13,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:13,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:13,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837519716] [2021-06-10 14:32:13,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:13,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:13,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477595058] [2021-06-10 14:32:13,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:13,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:13,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:13,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:13,024 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 329 [2021-06-10 14:32:13,024 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 327 transitions, 12750 flow. Second operand has 3 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:13,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:13,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 329 [2021-06-10 14:32:13,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:13,185 INFO L129 PetriNetUnfolder]: 0/326 cut-off events. [2021-06-10 14:32:13,185 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:13,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6539 conditions, 326 events. 0/326 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 630 event pairs, 0 based on Foata normal form. 109/435 useless extension candidates. Maximal degree in co-relation 0. Up to 109 conditions per place. [2021-06-10 14:32:13,186 INFO L132 encePairwiseOnDemand]: 327/329 looper letters, 0 selfloop transitions, 1 changer transitions 0/326 dead transitions. [2021-06-10 14:32:13,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 326 transitions, 12750 flow [2021-06-10 14:32:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2021-06-10 14:32:13,187 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9929078014184397 [2021-06-10 14:32:13,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2021-06-10 14:32:13,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2021-06-10 14:32:13,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:13,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2021-06-10 14:32:13,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:13,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:13,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:13,188 INFO L185 Difference]: Start difference. First operand has 544 places, 327 transitions, 12750 flow. Second operand 3 states and 980 transitions. [2021-06-10 14:32:13,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 326 transitions, 12750 flow [2021-06-10 14:32:13,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 326 transitions, 1194 flow, removed 5778 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:13,525 INFO L241 Difference]: Finished difference. Result has 545 places, 326 transitions, 1194 flow [2021-06-10 14:32:13,525 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1194, PETRI_PLACES=545, PETRI_TRANSITIONS=326} [2021-06-10 14:32:13,525 INFO L343 CegarLoopForPetriNet]: 544 programPoint places, 1 predicate places. [2021-06-10 14:32:13,525 INFO L480 AbstractCegarLoop]: Abstraction has has 545 places, 326 transitions, 1194 flow [2021-06-10 14:32:13,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:13,526 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:13,526 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:13,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2021-06-10 14:32:13,526 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:13,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1777993098, now seen corresponding path program 1 times [2021-06-10 14:32:13,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:13,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78869849] [2021-06-10 14:32:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:13,555 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:13,557 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:13,577 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:13,578 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:13,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2021-06-10 14:32:13,578 WARN L342 ceAbstractionStarter]: 108 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:13,578 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 109 thread instances. [2021-06-10 14:32:13,659 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:13,660 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:13,660 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:13,660 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:13,660 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:13,660 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:13,660 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:13,660 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:13,660 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:13,660 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:13,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 551 places, 332 transitions, 12981 flow [2021-06-10 14:32:13,942 INFO L129 PetriNetUnfolder]: 0/659 cut-off events. [2021-06-10 14:32:13,942 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:13,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6982 conditions, 659 events. 0/659 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2469 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 0. Up to 110 conditions per place. [2021-06-10 14:32:13,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 551 places, 332 transitions, 12981 flow [2021-06-10 14:32:13,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 549 places, 330 transitions, 12977 flow [2021-06-10 14:32:13,947 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:13,947 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:13,947 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:13,947 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:13,947 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:13,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:13,948 INFO L82 PathProgramCache]: Analyzing trace with hash 594019, now seen corresponding path program 1 times [2021-06-10 14:32:13,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:13,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513725271] [2021-06-10 14:32:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:13,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:13,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:13,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513725271] [2021-06-10 14:32:13,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:13,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:13,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946081849] [2021-06-10 14:32:13,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:13,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:13,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:13,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:13,978 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 332 [2021-06-10 14:32:13,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 330 transitions, 12977 flow. Second operand has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:13,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:13,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 332 [2021-06-10 14:32:13,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:14,142 INFO L129 PetriNetUnfolder]: 0/329 cut-off events. [2021-06-10 14:32:14,142 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:14,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6654 conditions, 329 events. 0/329 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 625 event pairs, 0 based on Foata normal form. 110/439 useless extension candidates. Maximal degree in co-relation 0. Up to 110 conditions per place. [2021-06-10 14:32:14,143 INFO L132 encePairwiseOnDemand]: 330/332 looper letters, 0 selfloop transitions, 1 changer transitions 0/329 dead transitions. [2021-06-10 14:32:14,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 329 transitions, 12977 flow [2021-06-10 14:32:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 989 transitions. [2021-06-10 14:32:14,143 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9929718875502008 [2021-06-10 14:32:14,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 989 transitions. [2021-06-10 14:32:14,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 989 transitions. [2021-06-10 14:32:14,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:14,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 989 transitions. [2021-06-10 14:32:14,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:14,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:14,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:14,145 INFO L185 Difference]: Start difference. First operand has 549 places, 330 transitions, 12977 flow. Second operand 3 states and 989 transitions. [2021-06-10 14:32:14,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 329 transitions, 12977 flow [2021-06-10 14:32:14,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 329 transitions, 1205 flow, removed 5886 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:14,494 INFO L241 Difference]: Finished difference. Result has 550 places, 329 transitions, 1205 flow [2021-06-10 14:32:14,494 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1205, PETRI_PLACES=550, PETRI_TRANSITIONS=329} [2021-06-10 14:32:14,494 INFO L343 CegarLoopForPetriNet]: 549 programPoint places, 1 predicate places. [2021-06-10 14:32:14,494 INFO L480 AbstractCegarLoop]: Abstraction has has 550 places, 329 transitions, 1205 flow [2021-06-10 14:32:14,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:14,495 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:14,495 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:14,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2021-06-10 14:32:14,495 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:14,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1263830381, now seen corresponding path program 1 times [2021-06-10 14:32:14,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:14,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772454583] [2021-06-10 14:32:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:14,524 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:14,526 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:14,547 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:14,547 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:14,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2021-06-10 14:32:14,547 WARN L342 ceAbstractionStarter]: 109 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:14,547 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 110 thread instances. [2021-06-10 14:32:14,629 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:14,629 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:14,630 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:14,630 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:14,630 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:14,630 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:14,630 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:14,630 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:14,630 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:14,630 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:14,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 556 places, 335 transitions, 13210 flow [2021-06-10 14:32:14,847 INFO L129 PetriNetUnfolder]: 0/665 cut-off events. [2021-06-10 14:32:14,847 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:14,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7101 conditions, 665 events. 0/665 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2425 event pairs, 0 based on Foata normal form. 0/554 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2021-06-10 14:32:14,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 556 places, 335 transitions, 13210 flow [2021-06-10 14:32:14,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 554 places, 333 transitions, 13206 flow [2021-06-10 14:32:14,852 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:14,852 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:14,852 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:14,852 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:14,852 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:14,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:14,852 INFO L82 PathProgramCache]: Analyzing trace with hash 604739, now seen corresponding path program 1 times [2021-06-10 14:32:14,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:14,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628695173] [2021-06-10 14:32:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:14,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:14,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:14,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628695173] [2021-06-10 14:32:14,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:14,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:14,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949974598] [2021-06-10 14:32:14,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:14,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:14,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:14,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:14,883 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 335 [2021-06-10 14:32:14,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 333 transitions, 13206 flow. Second operand has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:14,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:14,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 335 [2021-06-10 14:32:14,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:15,050 INFO L129 PetriNetUnfolder]: 0/332 cut-off events. [2021-06-10 14:32:15,051 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:15,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6770 conditions, 332 events. 0/332 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 574 event pairs, 0 based on Foata normal form. 111/443 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2021-06-10 14:32:15,051 INFO L132 encePairwiseOnDemand]: 333/335 looper letters, 0 selfloop transitions, 1 changer transitions 0/332 dead transitions. [2021-06-10 14:32:15,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 332 transitions, 13206 flow [2021-06-10 14:32:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:15,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 998 transitions. [2021-06-10 14:32:15,052 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9930348258706467 [2021-06-10 14:32:15,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 998 transitions. [2021-06-10 14:32:15,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 998 transitions. [2021-06-10 14:32:15,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:15,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 998 transitions. [2021-06-10 14:32:15,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:15,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:15,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:15,054 INFO L185 Difference]: Start difference. First operand has 554 places, 333 transitions, 13206 flow. Second operand 3 states and 998 transitions. [2021-06-10 14:32:15,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 332 transitions, 13206 flow [2021-06-10 14:32:15,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 332 transitions, 1216 flow, removed 5995 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:15,410 INFO L241 Difference]: Finished difference. Result has 555 places, 332 transitions, 1216 flow [2021-06-10 14:32:15,410 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1216, PETRI_PLACES=555, PETRI_TRANSITIONS=332} [2021-06-10 14:32:15,410 INFO L343 CegarLoopForPetriNet]: 554 programPoint places, 1 predicate places. [2021-06-10 14:32:15,410 INFO L480 AbstractCegarLoop]: Abstraction has has 555 places, 332 transitions, 1216 flow [2021-06-10 14:32:15,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:15,410 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:15,410 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:15,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2021-06-10 14:32:15,411 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:15,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:15,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1341832691, now seen corresponding path program 1 times [2021-06-10 14:32:15,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:15,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820928753] [2021-06-10 14:32:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:15,443 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:15,445 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:15,468 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:15,469 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:15,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-06-10 14:32:15,469 WARN L342 ceAbstractionStarter]: 110 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:15,469 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 111 thread instances. [2021-06-10 14:32:15,559 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:15,560 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:15,560 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:15,560 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:15,560 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:15,560 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:15,560 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:15,560 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:15,560 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:15,560 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:15,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 561 places, 338 transitions, 13441 flow [2021-06-10 14:32:15,785 INFO L129 PetriNetUnfolder]: 0/671 cut-off events. [2021-06-10 14:32:15,785 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:15,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7221 conditions, 671 events. 0/671 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2471 event pairs, 0 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 0. Up to 112 conditions per place. [2021-06-10 14:32:15,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 561 places, 338 transitions, 13441 flow [2021-06-10 14:32:15,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 559 places, 336 transitions, 13437 flow [2021-06-10 14:32:15,790 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:15,790 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:15,790 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:15,790 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:15,790 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:15,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:15,791 INFO L82 PathProgramCache]: Analyzing trace with hash 615555, now seen corresponding path program 1 times [2021-06-10 14:32:15,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:15,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405254565] [2021-06-10 14:32:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:15,823 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:15,823 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:15,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405254565] [2021-06-10 14:32:15,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:15,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:15,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119948448] [2021-06-10 14:32:15,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:15,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:15,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:15,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:15,826 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 338 [2021-06-10 14:32:15,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 336 transitions, 13437 flow. Second operand has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:15,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:15,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 338 [2021-06-10 14:32:15,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:15,998 INFO L129 PetriNetUnfolder]: 0/335 cut-off events. [2021-06-10 14:32:15,999 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:15,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6887 conditions, 335 events. 0/335 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 646 event pairs, 0 based on Foata normal form. 112/447 useless extension candidates. Maximal degree in co-relation 0. Up to 112 conditions per place. [2021-06-10 14:32:15,999 INFO L132 encePairwiseOnDemand]: 336/338 looper letters, 0 selfloop transitions, 1 changer transitions 0/335 dead transitions. [2021-06-10 14:32:16,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 335 transitions, 13437 flow [2021-06-10 14:32:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:16,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1007 transitions. [2021-06-10 14:32:16,000 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9930966469428008 [2021-06-10 14:32:16,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1007 transitions. [2021-06-10 14:32:16,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1007 transitions. [2021-06-10 14:32:16,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:16,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1007 transitions. [2021-06-10 14:32:16,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:16,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:16,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:16,002 INFO L185 Difference]: Start difference. First operand has 559 places, 336 transitions, 13437 flow. Second operand 3 states and 1007 transitions. [2021-06-10 14:32:16,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 335 transitions, 13437 flow [2021-06-10 14:32:16,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 335 transitions, 1227 flow, removed 6105 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:16,367 INFO L241 Difference]: Finished difference. Result has 560 places, 335 transitions, 1227 flow [2021-06-10 14:32:16,367 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1227, PETRI_PLACES=560, PETRI_TRANSITIONS=335} [2021-06-10 14:32:16,368 INFO L343 CegarLoopForPetriNet]: 559 programPoint places, 1 predicate places. [2021-06-10 14:32:16,368 INFO L480 AbstractCegarLoop]: Abstraction has has 560 places, 335 transitions, 1227 flow [2021-06-10 14:32:16,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:16,368 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:16,368 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:16,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-06-10 14:32:16,368 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:16,368 INFO L82 PathProgramCache]: Analyzing trace with hash 948168941, now seen corresponding path program 1 times [2021-06-10 14:32:16,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:16,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448151492] [2021-06-10 14:32:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:16,401 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:16,403 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:16,427 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:16,427 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:16,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-06-10 14:32:16,427 WARN L342 ceAbstractionStarter]: 111 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:16,427 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 112 thread instances. [2021-06-10 14:32:16,511 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:16,511 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:16,512 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:16,512 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:16,512 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:16,512 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:16,512 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:16,512 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:16,512 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:16,512 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:16,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 566 places, 341 transitions, 13674 flow [2021-06-10 14:32:16,822 INFO L129 PetriNetUnfolder]: 0/677 cut-off events. [2021-06-10 14:32:16,822 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:16,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7342 conditions, 677 events. 0/677 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2437 event pairs, 0 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 0. Up to 113 conditions per place. [2021-06-10 14:32:16,822 INFO L82 GeneralOperation]: Start removeDead. Operand has 566 places, 341 transitions, 13674 flow [2021-06-10 14:32:16,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 564 places, 339 transitions, 13670 flow [2021-06-10 14:32:16,827 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:16,828 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:16,828 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:16,828 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:16,828 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:16,828 INFO L82 PathProgramCache]: Analyzing trace with hash 626467, now seen corresponding path program 1 times [2021-06-10 14:32:16,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:16,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998664391] [2021-06-10 14:32:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:16,863 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:16,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:16,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998664391] [2021-06-10 14:32:16,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:16,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:16,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119257381] [2021-06-10 14:32:16,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:16,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:16,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:16,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:16,867 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 341 [2021-06-10 14:32:16,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 339 transitions, 13670 flow. Second operand has 3 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:16,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:16,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 341 [2021-06-10 14:32:16,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:17,072 INFO L129 PetriNetUnfolder]: 0/338 cut-off events. [2021-06-10 14:32:17,072 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:17,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7005 conditions, 338 events. 0/338 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 634 event pairs, 0 based on Foata normal form. 113/451 useless extension candidates. Maximal degree in co-relation 0. Up to 113 conditions per place. [2021-06-10 14:32:17,073 INFO L132 encePairwiseOnDemand]: 339/341 looper letters, 0 selfloop transitions, 1 changer transitions 0/338 dead transitions. [2021-06-10 14:32:17,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 338 transitions, 13670 flow [2021-06-10 14:32:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2021-06-10 14:32:17,074 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9931573802541545 [2021-06-10 14:32:17,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2021-06-10 14:32:17,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2021-06-10 14:32:17,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:17,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2021-06-10 14:32:17,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:17,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:17,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:17,075 INFO L185 Difference]: Start difference. First operand has 564 places, 339 transitions, 13670 flow. Second operand 3 states and 1016 transitions. [2021-06-10 14:32:17,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 338 transitions, 13670 flow [2021-06-10 14:32:17,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 338 transitions, 1238 flow, removed 6216 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:17,483 INFO L241 Difference]: Finished difference. Result has 565 places, 338 transitions, 1238 flow [2021-06-10 14:32:17,483 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1238, PETRI_PLACES=565, PETRI_TRANSITIONS=338} [2021-06-10 14:32:17,483 INFO L343 CegarLoopForPetriNet]: 564 programPoint places, 1 predicate places. [2021-06-10 14:32:17,483 INFO L480 AbstractCegarLoop]: Abstraction has has 565 places, 338 transitions, 1238 flow [2021-06-10 14:32:17,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:17,483 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:17,483 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:17,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-06-10 14:32:17,483 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:17,484 INFO L82 PathProgramCache]: Analyzing trace with hash 2125962704, now seen corresponding path program 1 times [2021-06-10 14:32:17,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:17,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929424612] [2021-06-10 14:32:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:17,523 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:17,526 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:17,552 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:17,552 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:17,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-06-10 14:32:17,553 WARN L342 ceAbstractionStarter]: 112 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:17,553 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 113 thread instances. [2021-06-10 14:32:17,645 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:17,646 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:17,646 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:17,646 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:17,646 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:17,646 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:17,646 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:17,646 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:17,646 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:17,646 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:17,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 571 places, 344 transitions, 13909 flow [2021-06-10 14:32:17,902 INFO L129 PetriNetUnfolder]: 0/683 cut-off events. [2021-06-10 14:32:17,902 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:17,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7464 conditions, 683 events. 0/683 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2578 event pairs, 0 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2021-06-10 14:32:17,902 INFO L82 GeneralOperation]: Start removeDead. Operand has 571 places, 344 transitions, 13909 flow [2021-06-10 14:32:17,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 569 places, 342 transitions, 13905 flow [2021-06-10 14:32:17,907 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:17,907 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:17,908 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:17,908 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:17,908 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:17,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:17,908 INFO L82 PathProgramCache]: Analyzing trace with hash 637475, now seen corresponding path program 1 times [2021-06-10 14:32:17,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:17,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375054635] [2021-06-10 14:32:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:17,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:17,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:17,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375054635] [2021-06-10 14:32:17,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:17,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:17,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569127642] [2021-06-10 14:32:17,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:17,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:17,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:17,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:17,941 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 344 [2021-06-10 14:32:17,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 342 transitions, 13905 flow. Second operand has 3 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:17,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:17,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 344 [2021-06-10 14:32:17,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:18,122 INFO L129 PetriNetUnfolder]: 0/341 cut-off events. [2021-06-10 14:32:18,122 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:18,122 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7124 conditions, 341 events. 0/341 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 690 event pairs, 0 based on Foata normal form. 114/455 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2021-06-10 14:32:18,123 INFO L132 encePairwiseOnDemand]: 342/344 looper letters, 0 selfloop transitions, 1 changer transitions 0/341 dead transitions. [2021-06-10 14:32:18,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 341 transitions, 13905 flow [2021-06-10 14:32:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1025 transitions. [2021-06-10 14:32:18,124 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9932170542635659 [2021-06-10 14:32:18,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1025 transitions. [2021-06-10 14:32:18,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1025 transitions. [2021-06-10 14:32:18,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:18,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1025 transitions. [2021-06-10 14:32:18,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:18,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:18,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:18,125 INFO L185 Difference]: Start difference. First operand has 569 places, 342 transitions, 13905 flow. Second operand 3 states and 1025 transitions. [2021-06-10 14:32:18,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 341 transitions, 13905 flow [2021-06-10 14:32:18,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 341 transitions, 1249 flow, removed 6328 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:18,511 INFO L241 Difference]: Finished difference. Result has 570 places, 341 transitions, 1249 flow [2021-06-10 14:32:18,511 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1249, PETRI_PLACES=570, PETRI_TRANSITIONS=341} [2021-06-10 14:32:18,511 INFO L343 CegarLoopForPetriNet]: 569 programPoint places, 1 predicate places. [2021-06-10 14:32:18,511 INFO L480 AbstractCegarLoop]: Abstraction has has 570 places, 341 transitions, 1249 flow [2021-06-10 14:32:18,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:18,511 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:18,511 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:18,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-06-10 14:32:18,511 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:18,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1212322745, now seen corresponding path program 1 times [2021-06-10 14:32:18,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:18,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59324648] [2021-06-10 14:32:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:18,543 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:18,545 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:18,569 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:18,569 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:18,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-06-10 14:32:18,569 WARN L342 ceAbstractionStarter]: 113 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:18,569 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 114 thread instances. [2021-06-10 14:32:18,665 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:18,666 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:18,666 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:18,666 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:18,666 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:18,666 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:18,666 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:18,666 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:18,666 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:18,666 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:18,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 576 places, 347 transitions, 14146 flow [2021-06-10 14:32:18,902 INFO L129 PetriNetUnfolder]: 0/689 cut-off events. [2021-06-10 14:32:18,902 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:18,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7587 conditions, 689 events. 0/689 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2639 event pairs, 0 based on Foata normal form. 0/574 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2021-06-10 14:32:18,902 INFO L82 GeneralOperation]: Start removeDead. Operand has 576 places, 347 transitions, 14146 flow [2021-06-10 14:32:18,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 574 places, 345 transitions, 14142 flow [2021-06-10 14:32:18,907 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:18,907 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:18,907 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:18,907 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:18,907 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:18,908 INFO L82 PathProgramCache]: Analyzing trace with hash 648579, now seen corresponding path program 1 times [2021-06-10 14:32:18,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:18,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260030611] [2021-06-10 14:32:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:18,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:18,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:18,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260030611] [2021-06-10 14:32:18,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:18,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:18,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92006859] [2021-06-10 14:32:18,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:18,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:18,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:18,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:18,942 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 347 [2021-06-10 14:32:18,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 345 transitions, 14142 flow. Second operand has 3 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:18,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:18,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 347 [2021-06-10 14:32:18,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:19,126 INFO L129 PetriNetUnfolder]: 0/344 cut-off events. [2021-06-10 14:32:19,126 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:19,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7244 conditions, 344 events. 0/344 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 601 event pairs, 0 based on Foata normal form. 115/459 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2021-06-10 14:32:19,127 INFO L132 encePairwiseOnDemand]: 345/347 looper letters, 0 selfloop transitions, 1 changer transitions 0/344 dead transitions. [2021-06-10 14:32:19,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 344 transitions, 14142 flow [2021-06-10 14:32:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:19,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:19,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1034 transitions. [2021-06-10 14:32:19,127 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9932756964457252 [2021-06-10 14:32:19,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1034 transitions. [2021-06-10 14:32:19,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1034 transitions. [2021-06-10 14:32:19,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:19,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1034 transitions. [2021-06-10 14:32:19,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:19,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:19,129 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:19,129 INFO L185 Difference]: Start difference. First operand has 574 places, 345 transitions, 14142 flow. Second operand 3 states and 1034 transitions. [2021-06-10 14:32:19,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 344 transitions, 14142 flow [2021-06-10 14:32:19,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 344 transitions, 1260 flow, removed 6441 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:19,508 INFO L241 Difference]: Finished difference. Result has 575 places, 344 transitions, 1260 flow [2021-06-10 14:32:19,508 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1260, PETRI_PLACES=575, PETRI_TRANSITIONS=344} [2021-06-10 14:32:19,508 INFO L343 CegarLoopForPetriNet]: 574 programPoint places, 1 predicate places. [2021-06-10 14:32:19,508 INFO L480 AbstractCegarLoop]: Abstraction has has 575 places, 344 transitions, 1260 flow [2021-06-10 14:32:19,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:19,508 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:19,508 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:19,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-06-10 14:32:19,509 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:19,509 INFO L82 PathProgramCache]: Analyzing trace with hash -233679533, now seen corresponding path program 1 times [2021-06-10 14:32:19,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:19,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243462241] [2021-06-10 14:32:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:19,541 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:19,543 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:19,568 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:19,568 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:19,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-06-10 14:32:19,568 WARN L342 ceAbstractionStarter]: 114 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:19,568 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 115 thread instances. [2021-06-10 14:32:19,650 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:19,651 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:19,651 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:19,651 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:19,651 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:19,651 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:19,651 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:19,651 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:19,651 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:19,651 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:19,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 581 places, 350 transitions, 14385 flow [2021-06-10 14:32:19,891 INFO L129 PetriNetUnfolder]: 0/695 cut-off events. [2021-06-10 14:32:19,891 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:19,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7711 conditions, 695 events. 0/695 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2519 event pairs, 0 based on Foata normal form. 0/579 useless extension candidates. Maximal degree in co-relation 0. Up to 116 conditions per place. [2021-06-10 14:32:19,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 581 places, 350 transitions, 14385 flow [2021-06-10 14:32:19,896 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 579 places, 348 transitions, 14381 flow [2021-06-10 14:32:19,897 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:19,897 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:19,897 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:19,897 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:19,897 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:19,897 INFO L82 PathProgramCache]: Analyzing trace with hash 659779, now seen corresponding path program 1 times [2021-06-10 14:32:19,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:19,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979080466] [2021-06-10 14:32:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:19,940 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:19,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:19,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979080466] [2021-06-10 14:32:19,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:19,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:19,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561262249] [2021-06-10 14:32:19,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:19,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:19,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:19,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:19,944 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 350 [2021-06-10 14:32:19,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 348 transitions, 14381 flow. Second operand has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:19,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:19,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 350 [2021-06-10 14:32:19,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:20,202 INFO L129 PetriNetUnfolder]: 0/347 cut-off events. [2021-06-10 14:32:20,202 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:20,202 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7365 conditions, 347 events. 0/347 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 665 event pairs, 0 based on Foata normal form. 116/463 useless extension candidates. Maximal degree in co-relation 0. Up to 116 conditions per place. [2021-06-10 14:32:20,203 INFO L132 encePairwiseOnDemand]: 348/350 looper letters, 0 selfloop transitions, 1 changer transitions 0/347 dead transitions. [2021-06-10 14:32:20,203 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 347 transitions, 14381 flow [2021-06-10 14:32:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1043 transitions. [2021-06-10 14:32:20,204 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9933333333333333 [2021-06-10 14:32:20,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1043 transitions. [2021-06-10 14:32:20,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1043 transitions. [2021-06-10 14:32:20,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:20,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1043 transitions. [2021-06-10 14:32:20,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:20,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:20,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:20,205 INFO L185 Difference]: Start difference. First operand has 579 places, 348 transitions, 14381 flow. Second operand 3 states and 1043 transitions. [2021-06-10 14:32:20,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 347 transitions, 14381 flow [2021-06-10 14:32:20,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 347 transitions, 1271 flow, removed 6555 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:20,598 INFO L241 Difference]: Finished difference. Result has 580 places, 347 transitions, 1271 flow [2021-06-10 14:32:20,598 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1271, PETRI_PLACES=580, PETRI_TRANSITIONS=347} [2021-06-10 14:32:20,599 INFO L343 CegarLoopForPetriNet]: 579 programPoint places, 1 predicate places. [2021-06-10 14:32:20,599 INFO L480 AbstractCegarLoop]: Abstraction has has 580 places, 347 transitions, 1271 flow [2021-06-10 14:32:20,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:20,599 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:20,599 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:20,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-06-10 14:32:20,599 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:20,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1707632977, now seen corresponding path program 1 times [2021-06-10 14:32:20,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:20,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696362536] [2021-06-10 14:32:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:20,635 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:20,637 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:20,660 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:20,660 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:20,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-06-10 14:32:20,660 WARN L342 ceAbstractionStarter]: 115 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:20,660 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 116 thread instances. [2021-06-10 14:32:20,739 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:20,739 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:20,739 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:20,739 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:20,739 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:20,740 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:20,740 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:20,740 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:20,740 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:20,740 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:20,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 586 places, 353 transitions, 14626 flow [2021-06-10 14:32:20,988 INFO L129 PetriNetUnfolder]: 0/701 cut-off events. [2021-06-10 14:32:20,988 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:20,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7836 conditions, 701 events. 0/701 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2538 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 0. Up to 117 conditions per place. [2021-06-10 14:32:20,988 INFO L82 GeneralOperation]: Start removeDead. Operand has 586 places, 353 transitions, 14626 flow [2021-06-10 14:32:20,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 584 places, 351 transitions, 14622 flow [2021-06-10 14:32:20,993 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:20,993 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:20,993 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:20,993 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:20,993 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:20,994 INFO L82 PathProgramCache]: Analyzing trace with hash 671075, now seen corresponding path program 1 times [2021-06-10 14:32:20,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:20,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309269761] [2021-06-10 14:32:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:21,029 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:21,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:21,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309269761] [2021-06-10 14:32:21,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:21,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:21,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473272975] [2021-06-10 14:32:21,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:21,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:21,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:21,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:21,032 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 353 [2021-06-10 14:32:21,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 351 transitions, 14622 flow. Second operand has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:21,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:21,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 353 [2021-06-10 14:32:21,033 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:21,223 INFO L129 PetriNetUnfolder]: 0/350 cut-off events. [2021-06-10 14:32:21,223 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:21,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7487 conditions, 350 events. 0/350 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 671 event pairs, 0 based on Foata normal form. 117/467 useless extension candidates. Maximal degree in co-relation 0. Up to 117 conditions per place. [2021-06-10 14:32:21,224 INFO L132 encePairwiseOnDemand]: 351/353 looper letters, 0 selfloop transitions, 1 changer transitions 0/350 dead transitions. [2021-06-10 14:32:21,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 350 transitions, 14622 flow [2021-06-10 14:32:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2021-06-10 14:32:21,225 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9933899905571294 [2021-06-10 14:32:21,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2021-06-10 14:32:21,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2021-06-10 14:32:21,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:21,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2021-06-10 14:32:21,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:21,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:21,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:21,226 INFO L185 Difference]: Start difference. First operand has 584 places, 351 transitions, 14622 flow. Second operand 3 states and 1052 transitions. [2021-06-10 14:32:21,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 350 transitions, 14622 flow [2021-06-10 14:32:21,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 350 transitions, 1282 flow, removed 6670 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:21,639 INFO L241 Difference]: Finished difference. Result has 585 places, 350 transitions, 1282 flow [2021-06-10 14:32:21,639 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1282, PETRI_PLACES=585, PETRI_TRANSITIONS=350} [2021-06-10 14:32:21,639 INFO L343 CegarLoopForPetriNet]: 584 programPoint places, 1 predicate places. [2021-06-10 14:32:21,639 INFO L480 AbstractCegarLoop]: Abstraction has has 585 places, 350 transitions, 1282 flow [2021-06-10 14:32:21,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:21,640 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:21,640 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:21,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-06-10 14:32:21,640 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:21,640 INFO L82 PathProgramCache]: Analyzing trace with hash -767531754, now seen corresponding path program 1 times [2021-06-10 14:32:21,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:21,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509606242] [2021-06-10 14:32:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:21,677 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:21,679 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:21,701 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:21,702 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:21,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2021-06-10 14:32:21,702 WARN L342 ceAbstractionStarter]: 116 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:21,702 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 117 thread instances. [2021-06-10 14:32:21,788 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:21,788 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:21,788 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:21,789 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:21,789 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:21,789 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:21,789 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:21,789 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:21,789 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:21,789 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:21,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 591 places, 356 transitions, 14869 flow [2021-06-10 14:32:22,040 INFO L129 PetriNetUnfolder]: 0/707 cut-off events. [2021-06-10 14:32:22,041 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:22,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7962 conditions, 707 events. 0/707 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2675 event pairs, 0 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 0. Up to 118 conditions per place. [2021-06-10 14:32:22,041 INFO L82 GeneralOperation]: Start removeDead. Operand has 591 places, 356 transitions, 14869 flow [2021-06-10 14:32:22,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 589 places, 354 transitions, 14865 flow [2021-06-10 14:32:22,046 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:22,046 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:22,046 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:22,046 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:22,046 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:22,047 INFO L82 PathProgramCache]: Analyzing trace with hash 682467, now seen corresponding path program 1 times [2021-06-10 14:32:22,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:22,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763594200] [2021-06-10 14:32:22,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:22,083 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:22,083 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:22,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763594200] [2021-06-10 14:32:22,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:22,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:22,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987757073] [2021-06-10 14:32:22,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:22,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:22,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:22,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:22,086 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 353 out of 356 [2021-06-10 14:32:22,086 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 354 transitions, 14865 flow. Second operand has 3 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:22,087 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:22,087 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 353 of 356 [2021-06-10 14:32:22,087 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:22,281 INFO L129 PetriNetUnfolder]: 0/353 cut-off events. [2021-06-10 14:32:22,281 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:22,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7610 conditions, 353 events. 0/353 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 653 event pairs, 0 based on Foata normal form. 118/471 useless extension candidates. Maximal degree in co-relation 0. Up to 118 conditions per place. [2021-06-10 14:32:22,282 INFO L132 encePairwiseOnDemand]: 354/356 looper letters, 0 selfloop transitions, 1 changer transitions 0/353 dead transitions. [2021-06-10 14:32:22,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 353 transitions, 14865 flow [2021-06-10 14:32:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1061 transitions. [2021-06-10 14:32:22,283 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9934456928838952 [2021-06-10 14:32:22,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1061 transitions. [2021-06-10 14:32:22,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1061 transitions. [2021-06-10 14:32:22,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:22,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1061 transitions. [2021-06-10 14:32:22,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:22,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:22,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:22,284 INFO L185 Difference]: Start difference. First operand has 589 places, 354 transitions, 14865 flow. Second operand 3 states and 1061 transitions. [2021-06-10 14:32:22,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 353 transitions, 14865 flow [2021-06-10 14:32:22,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 353 transitions, 1293 flow, removed 6786 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:22,726 INFO L241 Difference]: Finished difference. Result has 590 places, 353 transitions, 1293 flow [2021-06-10 14:32:22,726 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1293, PETRI_PLACES=590, PETRI_TRANSITIONS=353} [2021-06-10 14:32:22,726 INFO L343 CegarLoopForPetriNet]: 589 programPoint places, 1 predicate places. [2021-06-10 14:32:22,726 INFO L480 AbstractCegarLoop]: Abstraction has has 590 places, 353 transitions, 1293 flow [2021-06-10 14:32:22,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:22,726 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:22,726 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:22,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2021-06-10 14:32:22,726 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:22,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:22,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1177259317, now seen corresponding path program 1 times [2021-06-10 14:32:22,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:22,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752828986] [2021-06-10 14:32:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:22,768 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:22,770 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:22,795 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:22,796 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:22,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2021-06-10 14:32:22,796 WARN L342 ceAbstractionStarter]: 117 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:22,796 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 118 thread instances. [2021-06-10 14:32:22,884 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:22,884 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:22,885 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:22,885 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:22,885 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:22,885 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:22,885 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:22,885 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:22,885 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:22,885 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:22,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 596 places, 359 transitions, 15114 flow [2021-06-10 14:32:23,151 INFO L129 PetriNetUnfolder]: 0/713 cut-off events. [2021-06-10 14:32:23,151 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:23,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8089 conditions, 713 events. 0/713 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2613 event pairs, 0 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2021-06-10 14:32:23,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 596 places, 359 transitions, 15114 flow [2021-06-10 14:32:23,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 594 places, 357 transitions, 15110 flow [2021-06-10 14:32:23,157 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:23,157 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:23,157 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:23,157 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:23,158 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:23,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:23,158 INFO L82 PathProgramCache]: Analyzing trace with hash 693955, now seen corresponding path program 1 times [2021-06-10 14:32:23,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:23,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940744292] [2021-06-10 14:32:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:23,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:23,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:23,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940744292] [2021-06-10 14:32:23,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:23,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:23,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757912971] [2021-06-10 14:32:23,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:23,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:23,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:23,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:23,199 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 356 out of 359 [2021-06-10 14:32:23,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 357 transitions, 15110 flow. Second operand has 3 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:23,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:23,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 356 of 359 [2021-06-10 14:32:23,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:23,405 INFO L129 PetriNetUnfolder]: 0/356 cut-off events. [2021-06-10 14:32:23,405 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:23,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7734 conditions, 356 events. 0/356 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 662 event pairs, 0 based on Foata normal form. 119/475 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2021-06-10 14:32:23,406 INFO L132 encePairwiseOnDemand]: 357/359 looper letters, 0 selfloop transitions, 1 changer transitions 0/356 dead transitions. [2021-06-10 14:32:23,406 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 356 transitions, 15110 flow [2021-06-10 14:32:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1070 transitions. [2021-06-10 14:32:23,407 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9935004642525533 [2021-06-10 14:32:23,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1070 transitions. [2021-06-10 14:32:23,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1070 transitions. [2021-06-10 14:32:23,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:23,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1070 transitions. [2021-06-10 14:32:23,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:23,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:23,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:23,408 INFO L185 Difference]: Start difference. First operand has 594 places, 357 transitions, 15110 flow. Second operand 3 states and 1070 transitions. [2021-06-10 14:32:23,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 356 transitions, 15110 flow [2021-06-10 14:32:23,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 356 transitions, 1304 flow, removed 6903 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:23,975 INFO L241 Difference]: Finished difference. Result has 595 places, 356 transitions, 1304 flow [2021-06-10 14:32:23,976 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1304, PETRI_PLACES=595, PETRI_TRANSITIONS=356} [2021-06-10 14:32:23,976 INFO L343 CegarLoopForPetriNet]: 594 programPoint places, 1 predicate places. [2021-06-10 14:32:23,976 INFO L480 AbstractCegarLoop]: Abstraction has has 595 places, 356 transitions, 1304 flow [2021-06-10 14:32:23,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:23,976 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:23,976 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:23,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2021-06-10 14:32:23,976 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:23,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1225165209, now seen corresponding path program 1 times [2021-06-10 14:32:23,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:23,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578087717] [2021-06-10 14:32:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:24,018 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:24,020 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:24,045 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:24,045 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:24,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2021-06-10 14:32:24,046 WARN L342 ceAbstractionStarter]: 118 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:24,046 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 119 thread instances. [2021-06-10 14:32:24,137 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:24,138 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:24,138 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:24,138 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:24,138 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:24,138 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:24,138 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:24,138 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:24,138 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:24,138 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:24,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 601 places, 362 transitions, 15361 flow [2021-06-10 14:32:24,410 INFO L129 PetriNetUnfolder]: 0/719 cut-off events. [2021-06-10 14:32:24,410 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:24,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8217 conditions, 719 events. 0/719 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2717 event pairs, 0 based on Foata normal form. 0/599 useless extension candidates. Maximal degree in co-relation 0. Up to 120 conditions per place. [2021-06-10 14:32:24,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 601 places, 362 transitions, 15361 flow [2021-06-10 14:32:24,416 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 599 places, 360 transitions, 15357 flow [2021-06-10 14:32:24,416 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:24,416 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:24,416 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:24,416 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:24,416 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:24,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:24,417 INFO L82 PathProgramCache]: Analyzing trace with hash 705539, now seen corresponding path program 1 times [2021-06-10 14:32:24,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:24,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104527837] [2021-06-10 14:32:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:24,457 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:24,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:24,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104527837] [2021-06-10 14:32:24,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:24,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:24,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276057601] [2021-06-10 14:32:24,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:24,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:24,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:24,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:24,460 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 362 [2021-06-10 14:32:24,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 360 transitions, 15357 flow. Second operand has 3 states, 3 states have (on average 359.6666666666667) internal successors, (1079), 3 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:24,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:24,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 362 [2021-06-10 14:32:24,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:24,666 INFO L129 PetriNetUnfolder]: 0/359 cut-off events. [2021-06-10 14:32:24,666 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:24,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7859 conditions, 359 events. 0/359 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 751 event pairs, 0 based on Foata normal form. 120/479 useless extension candidates. Maximal degree in co-relation 0. Up to 120 conditions per place. [2021-06-10 14:32:24,667 INFO L132 encePairwiseOnDemand]: 360/362 looper letters, 0 selfloop transitions, 1 changer transitions 0/359 dead transitions. [2021-06-10 14:32:24,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 359 transitions, 15357 flow [2021-06-10 14:32:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1079 transitions. [2021-06-10 14:32:24,668 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9935543278084714 [2021-06-10 14:32:24,668 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1079 transitions. [2021-06-10 14:32:24,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1079 transitions. [2021-06-10 14:32:24,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:24,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1079 transitions. [2021-06-10 14:32:24,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.6666666666667) internal successors, (1079), 3 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:24,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:24,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:24,669 INFO L185 Difference]: Start difference. First operand has 599 places, 360 transitions, 15357 flow. Second operand 3 states and 1079 transitions. [2021-06-10 14:32:24,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 359 transitions, 15357 flow [2021-06-10 14:32:25,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 359 transitions, 1315 flow, removed 7021 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:25,144 INFO L241 Difference]: Finished difference. Result has 600 places, 359 transitions, 1315 flow [2021-06-10 14:32:25,144 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1315, PETRI_PLACES=600, PETRI_TRANSITIONS=359} [2021-06-10 14:32:25,144 INFO L343 CegarLoopForPetriNet]: 599 programPoint places, 1 predicate places. [2021-06-10 14:32:25,144 INFO L480 AbstractCegarLoop]: Abstraction has has 600 places, 359 transitions, 1315 flow [2021-06-10 14:32:25,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 359.6666666666667) internal successors, (1079), 3 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:25,144 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:25,144 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:25,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2021-06-10 14:32:25,145 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:25,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2146460389, now seen corresponding path program 1 times [2021-06-10 14:32:25,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:25,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917800013] [2021-06-10 14:32:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:25,184 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:25,186 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:25,213 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:25,213 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:25,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2021-06-10 14:32:25,214 WARN L342 ceAbstractionStarter]: 119 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:25,214 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 120 thread instances. [2021-06-10 14:32:25,309 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:25,309 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:25,309 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:25,309 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:25,309 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:25,309 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:25,310 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:25,310 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:25,310 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:25,310 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:25,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 606 places, 365 transitions, 15610 flow [2021-06-10 14:32:25,597 INFO L129 PetriNetUnfolder]: 0/725 cut-off events. [2021-06-10 14:32:25,597 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:25,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8346 conditions, 725 events. 0/725 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2616 event pairs, 0 based on Foata normal form. 0/604 useless extension candidates. Maximal degree in co-relation 0. Up to 121 conditions per place. [2021-06-10 14:32:25,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 606 places, 365 transitions, 15610 flow [2021-06-10 14:32:25,603 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 604 places, 363 transitions, 15606 flow [2021-06-10 14:32:25,603 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:25,603 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:25,603 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:25,603 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:25,603 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:25,604 INFO L82 PathProgramCache]: Analyzing trace with hash 717219, now seen corresponding path program 1 times [2021-06-10 14:32:25,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:25,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276947062] [2021-06-10 14:32:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:25,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:25,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:25,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276947062] [2021-06-10 14:32:25,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:25,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:25,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174122477] [2021-06-10 14:32:25,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:25,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:25,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:25,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:25,654 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 365 [2021-06-10 14:32:25,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 363 transitions, 15606 flow. Second operand has 3 states, 3 states have (on average 362.6666666666667) internal successors, (1088), 3 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:25,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:25,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 365 [2021-06-10 14:32:25,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:25,871 INFO L129 PetriNetUnfolder]: 0/362 cut-off events. [2021-06-10 14:32:25,871 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:25,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7985 conditions, 362 events. 0/362 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 629 event pairs, 0 based on Foata normal form. 121/483 useless extension candidates. Maximal degree in co-relation 0. Up to 121 conditions per place. [2021-06-10 14:32:25,872 INFO L132 encePairwiseOnDemand]: 363/365 looper letters, 0 selfloop transitions, 1 changer transitions 0/362 dead transitions. [2021-06-10 14:32:25,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 362 transitions, 15606 flow [2021-06-10 14:32:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:25,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1088 transitions. [2021-06-10 14:32:25,873 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.993607305936073 [2021-06-10 14:32:25,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1088 transitions. [2021-06-10 14:32:25,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1088 transitions. [2021-06-10 14:32:25,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:25,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1088 transitions. [2021-06-10 14:32:25,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 362.6666666666667) internal successors, (1088), 3 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:25,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:25,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:25,875 INFO L185 Difference]: Start difference. First operand has 604 places, 363 transitions, 15606 flow. Second operand 3 states and 1088 transitions. [2021-06-10 14:32:25,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 362 transitions, 15606 flow [2021-06-10 14:32:26,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 362 transitions, 1326 flow, removed 7140 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:26,401 INFO L241 Difference]: Finished difference. Result has 605 places, 362 transitions, 1326 flow [2021-06-10 14:32:26,401 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1326, PETRI_PLACES=605, PETRI_TRANSITIONS=362} [2021-06-10 14:32:26,402 INFO L343 CegarLoopForPetriNet]: 604 programPoint places, 1 predicate places. [2021-06-10 14:32:26,402 INFO L480 AbstractCegarLoop]: Abstraction has has 605 places, 362 transitions, 1326 flow [2021-06-10 14:32:26,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 362.6666666666667) internal successors, (1088), 3 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:26,402 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:26,402 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:26,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2021-06-10 14:32:26,402 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash -583844004, now seen corresponding path program 1 times [2021-06-10 14:32:26,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:26,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776912779] [2021-06-10 14:32:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:26,441 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:26,443 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:26,469 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:26,469 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:26,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2021-06-10 14:32:26,469 WARN L342 ceAbstractionStarter]: 120 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:26,469 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 121 thread instances. [2021-06-10 14:32:26,563 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:26,563 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:26,564 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:26,564 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:26,564 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:26,564 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:26,564 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:26,564 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:26,564 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:26,564 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:26,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 611 places, 368 transitions, 15861 flow [2021-06-10 14:32:26,845 INFO L129 PetriNetUnfolder]: 0/731 cut-off events. [2021-06-10 14:32:26,845 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:26,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8476 conditions, 731 events. 0/731 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2759 event pairs, 0 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 0. Up to 122 conditions per place. [2021-06-10 14:32:26,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 611 places, 368 transitions, 15861 flow [2021-06-10 14:32:26,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 609 places, 366 transitions, 15857 flow [2021-06-10 14:32:26,851 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:26,851 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:26,851 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:26,851 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:26,851 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:26,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:26,851 INFO L82 PathProgramCache]: Analyzing trace with hash 728995, now seen corresponding path program 1 times [2021-06-10 14:32:26,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:26,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550925424] [2021-06-10 14:32:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:26,890 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:26,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:26,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550925424] [2021-06-10 14:32:26,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:26,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:26,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037973112] [2021-06-10 14:32:26,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:26,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:26,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:26,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:26,894 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 368 [2021-06-10 14:32:26,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 366 transitions, 15857 flow. Second operand has 3 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:26,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:26,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 368 [2021-06-10 14:32:26,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:27,209 INFO L129 PetriNetUnfolder]: 0/365 cut-off events. [2021-06-10 14:32:27,209 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:27,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8112 conditions, 365 events. 0/365 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 729 event pairs, 0 based on Foata normal form. 122/487 useless extension candidates. Maximal degree in co-relation 0. Up to 122 conditions per place. [2021-06-10 14:32:27,210 INFO L132 encePairwiseOnDemand]: 366/368 looper letters, 0 selfloop transitions, 1 changer transitions 0/365 dead transitions. [2021-06-10 14:32:27,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 365 transitions, 15857 flow [2021-06-10 14:32:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1097 transitions. [2021-06-10 14:32:27,211 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9936594202898551 [2021-06-10 14:32:27,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1097 transitions. [2021-06-10 14:32:27,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1097 transitions. [2021-06-10 14:32:27,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:27,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1097 transitions. [2021-06-10 14:32:27,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:27,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:27,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:27,213 INFO L185 Difference]: Start difference. First operand has 609 places, 366 transitions, 15857 flow. Second operand 3 states and 1097 transitions. [2021-06-10 14:32:27,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 365 transitions, 15857 flow [2021-06-10 14:32:27,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 365 transitions, 1337 flow, removed 7260 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:27,749 INFO L241 Difference]: Finished difference. Result has 610 places, 365 transitions, 1337 flow [2021-06-10 14:32:27,749 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1337, PETRI_PLACES=610, PETRI_TRANSITIONS=365} [2021-06-10 14:32:27,749 INFO L343 CegarLoopForPetriNet]: 609 programPoint places, 1 predicate places. [2021-06-10 14:32:27,750 INFO L480 AbstractCegarLoop]: Abstraction has has 610 places, 365 transitions, 1337 flow [2021-06-10 14:32:27,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:27,750 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:27,750 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:27,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2021-06-10 14:32:27,750 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:27,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:27,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1667658271, now seen corresponding path program 1 times [2021-06-10 14:32:27,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:27,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250227649] [2021-06-10 14:32:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:27,786 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:27,788 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:27,813 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:27,814 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:27,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2021-06-10 14:32:27,814 WARN L342 ceAbstractionStarter]: 121 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:27,814 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 122 thread instances. [2021-06-10 14:32:27,907 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:27,907 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:27,908 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:27,908 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:27,908 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:27,908 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:27,908 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:27,908 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:27,908 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:27,908 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:27,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 616 places, 371 transitions, 16114 flow [2021-06-10 14:32:28,191 INFO L129 PetriNetUnfolder]: 0/737 cut-off events. [2021-06-10 14:32:28,191 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:28,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8607 conditions, 737 events. 0/737 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2763 event pairs, 0 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2021-06-10 14:32:28,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 616 places, 371 transitions, 16114 flow [2021-06-10 14:32:28,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 614 places, 369 transitions, 16110 flow [2021-06-10 14:32:28,197 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:28,197 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:28,197 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:28,197 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:28,197 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:28,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:28,197 INFO L82 PathProgramCache]: Analyzing trace with hash 740867, now seen corresponding path program 1 times [2021-06-10 14:32:28,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:28,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880754639] [2021-06-10 14:32:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:28,232 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:28,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:28,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880754639] [2021-06-10 14:32:28,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:28,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:28,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914002743] [2021-06-10 14:32:28,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:28,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:28,236 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 368 out of 371 [2021-06-10 14:32:28,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 369 transitions, 16110 flow. Second operand has 3 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:28,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:28,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 368 of 371 [2021-06-10 14:32:28,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:28,452 INFO L129 PetriNetUnfolder]: 0/368 cut-off events. [2021-06-10 14:32:28,452 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:28,452 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8240 conditions, 368 events. 0/368 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 678 event pairs, 0 based on Foata normal form. 123/491 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2021-06-10 14:32:28,453 INFO L132 encePairwiseOnDemand]: 369/371 looper letters, 0 selfloop transitions, 1 changer transitions 0/368 dead transitions. [2021-06-10 14:32:28,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 368 transitions, 16110 flow [2021-06-10 14:32:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1106 transitions. [2021-06-10 14:32:28,454 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9937106918238994 [2021-06-10 14:32:28,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1106 transitions. [2021-06-10 14:32:28,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1106 transitions. [2021-06-10 14:32:28,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:28,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1106 transitions. [2021-06-10 14:32:28,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:28,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:28,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:28,455 INFO L185 Difference]: Start difference. First operand has 614 places, 369 transitions, 16110 flow. Second operand 3 states and 1106 transitions. [2021-06-10 14:32:28,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 368 transitions, 16110 flow [2021-06-10 14:32:28,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 368 transitions, 1348 flow, removed 7381 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:28,981 INFO L241 Difference]: Finished difference. Result has 615 places, 368 transitions, 1348 flow [2021-06-10 14:32:28,981 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1348, PETRI_PLACES=615, PETRI_TRANSITIONS=368} [2021-06-10 14:32:28,981 INFO L343 CegarLoopForPetriNet]: 614 programPoint places, 1 predicate places. [2021-06-10 14:32:28,981 INFO L480 AbstractCegarLoop]: Abstraction has has 615 places, 368 transitions, 1348 flow [2021-06-10 14:32:28,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:28,982 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:28,982 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:28,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2021-06-10 14:32:28,982 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:28,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:28,982 INFO L82 PathProgramCache]: Analyzing trace with hash 873382623, now seen corresponding path program 1 times [2021-06-10 14:32:28,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:28,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138606705] [2021-06-10 14:32:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:29,018 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:29,020 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:29,045 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:29,046 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:29,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2021-06-10 14:32:29,046 WARN L342 ceAbstractionStarter]: 122 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:29,046 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 123 thread instances. [2021-06-10 14:32:29,135 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:29,135 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:29,136 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:29,136 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:29,136 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:29,136 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:29,136 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:29,136 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:29,136 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:29,136 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:29,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 621 places, 374 transitions, 16369 flow [2021-06-10 14:32:29,420 INFO L129 PetriNetUnfolder]: 0/743 cut-off events. [2021-06-10 14:32:29,420 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:29,420 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8739 conditions, 743 events. 0/743 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2799 event pairs, 0 based on Foata normal form. 0/619 useless extension candidates. Maximal degree in co-relation 0. Up to 124 conditions per place. [2021-06-10 14:32:29,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 621 places, 374 transitions, 16369 flow [2021-06-10 14:32:29,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 619 places, 372 transitions, 16365 flow [2021-06-10 14:32:29,426 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:29,426 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:29,426 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:29,426 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:29,426 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:29,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:29,426 INFO L82 PathProgramCache]: Analyzing trace with hash 752835, now seen corresponding path program 1 times [2021-06-10 14:32:29,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:29,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164259506] [2021-06-10 14:32:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:29,462 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:29,463 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:29,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164259506] [2021-06-10 14:32:29,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:29,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:29,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135576171] [2021-06-10 14:32:29,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:29,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:29,466 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 371 out of 374 [2021-06-10 14:32:29,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 372 transitions, 16365 flow. Second operand has 3 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:29,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:29,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 371 of 374 [2021-06-10 14:32:29,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:29,689 INFO L129 PetriNetUnfolder]: 0/371 cut-off events. [2021-06-10 14:32:29,689 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:29,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8369 conditions, 371 events. 0/371 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 724 event pairs, 0 based on Foata normal form. 124/495 useless extension candidates. Maximal degree in co-relation 0. Up to 124 conditions per place. [2021-06-10 14:32:29,690 INFO L132 encePairwiseOnDemand]: 372/374 looper letters, 0 selfloop transitions, 1 changer transitions 0/371 dead transitions. [2021-06-10 14:32:29,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 371 transitions, 16365 flow [2021-06-10 14:32:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1115 transitions. [2021-06-10 14:32:29,691 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9937611408199644 [2021-06-10 14:32:29,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1115 transitions. [2021-06-10 14:32:29,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1115 transitions. [2021-06-10 14:32:29,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:29,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1115 transitions. [2021-06-10 14:32:29,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:29,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:29,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:29,692 INFO L185 Difference]: Start difference. First operand has 619 places, 372 transitions, 16365 flow. Second operand 3 states and 1115 transitions. [2021-06-10 14:32:29,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 371 transitions, 16365 flow [2021-06-10 14:32:30,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 371 transitions, 1359 flow, removed 7503 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:30,243 INFO L241 Difference]: Finished difference. Result has 620 places, 371 transitions, 1359 flow [2021-06-10 14:32:30,243 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1359, PETRI_PLACES=620, PETRI_TRANSITIONS=371} [2021-06-10 14:32:30,243 INFO L343 CegarLoopForPetriNet]: 619 programPoint places, 1 predicate places. [2021-06-10 14:32:30,243 INFO L480 AbstractCegarLoop]: Abstraction has has 620 places, 371 transitions, 1359 flow [2021-06-10 14:32:30,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:30,244 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:30,244 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:30,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2021-06-10 14:32:30,244 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:30,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:30,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1539837527, now seen corresponding path program 1 times [2021-06-10 14:32:30,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:30,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796713487] [2021-06-10 14:32:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:30,280 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:30,282 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:30,309 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:30,309 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:30,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2021-06-10 14:32:30,309 WARN L342 ceAbstractionStarter]: 123 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:30,309 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 124 thread instances. [2021-06-10 14:32:30,405 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:30,405 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:30,406 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:30,406 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:30,406 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:30,406 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:30,406 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:30,406 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:30,406 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:30,406 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:30,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 626 places, 377 transitions, 16626 flow [2021-06-10 14:32:30,699 INFO L129 PetriNetUnfolder]: 0/749 cut-off events. [2021-06-10 14:32:30,699 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:30,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8872 conditions, 749 events. 0/749 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2678 event pairs, 0 based on Foata normal form. 0/624 useless extension candidates. Maximal degree in co-relation 0. Up to 125 conditions per place. [2021-06-10 14:32:30,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 626 places, 377 transitions, 16626 flow [2021-06-10 14:32:30,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 624 places, 375 transitions, 16622 flow [2021-06-10 14:32:30,705 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:30,705 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:30,705 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:30,705 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:30,705 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:30,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:30,705 INFO L82 PathProgramCache]: Analyzing trace with hash 764899, now seen corresponding path program 1 times [2021-06-10 14:32:30,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:30,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373285796] [2021-06-10 14:32:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:30,741 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:30,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:30,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373285796] [2021-06-10 14:32:30,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:30,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:30,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801090881] [2021-06-10 14:32:30,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:30,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:30,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:30,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:30,801 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 374 out of 377 [2021-06-10 14:32:30,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 375 transitions, 16622 flow. Second operand has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:30,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:30,802 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 374 of 377 [2021-06-10 14:32:30,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:31,063 INFO L129 PetriNetUnfolder]: 0/374 cut-off events. [2021-06-10 14:32:31,063 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:31,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8499 conditions, 374 events. 0/374 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 703 event pairs, 0 based on Foata normal form. 125/499 useless extension candidates. Maximal degree in co-relation 0. Up to 125 conditions per place. [2021-06-10 14:32:31,064 INFO L132 encePairwiseOnDemand]: 375/377 looper letters, 0 selfloop transitions, 1 changer transitions 0/374 dead transitions. [2021-06-10 14:32:31,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 374 transitions, 16622 flow [2021-06-10 14:32:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2021-06-10 14:32:31,065 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9938107869142352 [2021-06-10 14:32:31,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2021-06-10 14:32:31,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2021-06-10 14:32:31,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:31,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2021-06-10 14:32:31,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:31,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:31,066 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:31,066 INFO L185 Difference]: Start difference. First operand has 624 places, 375 transitions, 16622 flow. Second operand 3 states and 1124 transitions. [2021-06-10 14:32:31,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 374 transitions, 16622 flow [2021-06-10 14:32:31,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 374 transitions, 1370 flow, removed 7626 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:31,689 INFO L241 Difference]: Finished difference. Result has 625 places, 374 transitions, 1370 flow [2021-06-10 14:32:31,689 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1370, PETRI_PLACES=625, PETRI_TRANSITIONS=374} [2021-06-10 14:32:31,689 INFO L343 CegarLoopForPetriNet]: 624 programPoint places, 1 predicate places. [2021-06-10 14:32:31,689 INFO L480 AbstractCegarLoop]: Abstraction has has 625 places, 374 transitions, 1370 flow [2021-06-10 14:32:31,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:31,690 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:31,690 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:31,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2021-06-10 14:32:31,690 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:31,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:31,690 INFO L82 PathProgramCache]: Analyzing trace with hash 415961250, now seen corresponding path program 1 times [2021-06-10 14:32:31,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:31,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299430997] [2021-06-10 14:32:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:31,732 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:31,734 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:31,764 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:31,765 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:31,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2021-06-10 14:32:31,765 WARN L342 ceAbstractionStarter]: 124 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:31,765 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 125 thread instances. [2021-06-10 14:32:31,867 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:31,867 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:31,868 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:31,868 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:31,868 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:31,868 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:31,868 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:31,868 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:31,868 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:31,868 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:31,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 631 places, 380 transitions, 16885 flow [2021-06-10 14:32:32,215 INFO L129 PetriNetUnfolder]: 0/755 cut-off events. [2021-06-10 14:32:32,215 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:32,215 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9006 conditions, 755 events. 0/755 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2850 event pairs, 0 based on Foata normal form. 0/629 useless extension candidates. Maximal degree in co-relation 0. Up to 126 conditions per place. [2021-06-10 14:32:32,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 631 places, 380 transitions, 16885 flow [2021-06-10 14:32:32,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 629 places, 378 transitions, 16881 flow [2021-06-10 14:32:32,221 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:32,221 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:32,221 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:32,221 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:32,222 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:32,222 INFO L82 PathProgramCache]: Analyzing trace with hash 777059, now seen corresponding path program 1 times [2021-06-10 14:32:32,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:32,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415526486] [2021-06-10 14:32:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:32,262 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:32,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:32,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415526486] [2021-06-10 14:32:32,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:32,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:32,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675584916] [2021-06-10 14:32:32,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:32,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:32,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:32,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:32,266 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 380 [2021-06-10 14:32:32,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 629 places, 378 transitions, 16881 flow. Second operand has 3 states, 3 states have (on average 377.6666666666667) internal successors, (1133), 3 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:32,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:32,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 380 [2021-06-10 14:32:32,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:32,503 INFO L129 PetriNetUnfolder]: 0/377 cut-off events. [2021-06-10 14:32:32,503 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:32,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8630 conditions, 377 events. 0/377 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 751 event pairs, 0 based on Foata normal form. 126/503 useless extension candidates. Maximal degree in co-relation 0. Up to 126 conditions per place. [2021-06-10 14:32:32,504 INFO L132 encePairwiseOnDemand]: 378/380 looper letters, 0 selfloop transitions, 1 changer transitions 0/377 dead transitions. [2021-06-10 14:32:32,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 377 transitions, 16881 flow [2021-06-10 14:32:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:32,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1133 transitions. [2021-06-10 14:32:32,505 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.993859649122807 [2021-06-10 14:32:32,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1133 transitions. [2021-06-10 14:32:32,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1133 transitions. [2021-06-10 14:32:32,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:32,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1133 transitions. [2021-06-10 14:32:32,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.6666666666667) internal successors, (1133), 3 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:32,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:32,507 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:32,507 INFO L185 Difference]: Start difference. First operand has 629 places, 378 transitions, 16881 flow. Second operand 3 states and 1133 transitions. [2021-06-10 14:32:32,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 377 transitions, 16881 flow [2021-06-10 14:32:33,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 377 transitions, 1381 flow, removed 7750 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:33,145 INFO L241 Difference]: Finished difference. Result has 630 places, 377 transitions, 1381 flow [2021-06-10 14:32:33,145 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1381, PETRI_PLACES=630, PETRI_TRANSITIONS=377} [2021-06-10 14:32:33,146 INFO L343 CegarLoopForPetriNet]: 629 programPoint places, 1 predicate places. [2021-06-10 14:32:33,146 INFO L480 AbstractCegarLoop]: Abstraction has has 630 places, 377 transitions, 1381 flow [2021-06-10 14:32:33,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 377.6666666666667) internal successors, (1133), 3 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:33,146 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:33,146 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:33,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2021-06-10 14:32:33,146 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:33,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1560628803, now seen corresponding path program 1 times [2021-06-10 14:32:33,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:33,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541154462] [2021-06-10 14:32:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:33,182 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:33,184 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:33,214 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:33,214 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:33,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2021-06-10 14:32:33,214 WARN L342 ceAbstractionStarter]: 125 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:33,214 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 126 thread instances. [2021-06-10 14:32:33,310 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:33,310 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:33,310 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:33,310 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:33,310 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:33,310 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:33,310 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:33,311 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:33,311 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:33,311 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:33,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 636 places, 383 transitions, 17146 flow [2021-06-10 14:32:33,620 INFO L129 PetriNetUnfolder]: 0/761 cut-off events. [2021-06-10 14:32:33,620 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:33,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9141 conditions, 761 events. 0/761 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2848 event pairs, 0 based on Foata normal form. 0/634 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2021-06-10 14:32:33,620 INFO L82 GeneralOperation]: Start removeDead. Operand has 636 places, 383 transitions, 17146 flow [2021-06-10 14:32:33,626 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 634 places, 381 transitions, 17142 flow [2021-06-10 14:32:33,626 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:33,626 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:33,626 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:33,626 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:33,626 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:33,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash 789315, now seen corresponding path program 1 times [2021-06-10 14:32:33,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:33,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218587167] [2021-06-10 14:32:33,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:33,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:33,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:33,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218587167] [2021-06-10 14:32:33,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:33,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:33,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325960725] [2021-06-10 14:32:33,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:33,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:33,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:33,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:33,667 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 380 out of 383 [2021-06-10 14:32:33,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 381 transitions, 17142 flow. Second operand has 3 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:33,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:33,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 380 of 383 [2021-06-10 14:32:33,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:33,903 INFO L129 PetriNetUnfolder]: 0/380 cut-off events. [2021-06-10 14:32:33,904 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:33,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8762 conditions, 380 events. 0/380 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 728 event pairs, 0 based on Foata normal form. 127/507 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2021-06-10 14:32:33,905 INFO L132 encePairwiseOnDemand]: 381/383 looper letters, 0 selfloop transitions, 1 changer transitions 0/380 dead transitions. [2021-06-10 14:32:33,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 380 transitions, 17142 flow [2021-06-10 14:32:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1142 transitions. [2021-06-10 14:32:33,905 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9939077458659704 [2021-06-10 14:32:33,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1142 transitions. [2021-06-10 14:32:33,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1142 transitions. [2021-06-10 14:32:33,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:33,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1142 transitions. [2021-06-10 14:32:33,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:33,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 383.0) internal successors, (1532), 4 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:33,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 383.0) internal successors, (1532), 4 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:33,907 INFO L185 Difference]: Start difference. First operand has 634 places, 381 transitions, 17142 flow. Second operand 3 states and 1142 transitions. [2021-06-10 14:32:33,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 380 transitions, 17142 flow [2021-06-10 14:32:34,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 380 transitions, 1392 flow, removed 7875 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:34,540 INFO L241 Difference]: Finished difference. Result has 635 places, 380 transitions, 1392 flow [2021-06-10 14:32:34,540 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=383, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1392, PETRI_PLACES=635, PETRI_TRANSITIONS=380} [2021-06-10 14:32:34,541 INFO L343 CegarLoopForPetriNet]: 634 programPoint places, 1 predicate places. [2021-06-10 14:32:34,541 INFO L480 AbstractCegarLoop]: Abstraction has has 635 places, 380 transitions, 1392 flow [2021-06-10 14:32:34,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:34,541 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:34,541 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:34,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2021-06-10 14:32:34,541 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1240720677, now seen corresponding path program 1 times [2021-06-10 14:32:34,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:34,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823840595] [2021-06-10 14:32:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:34,577 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:34,579 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:34,607 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:34,608 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:34,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2021-06-10 14:32:34,608 WARN L342 ceAbstractionStarter]: 126 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:34,608 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 127 thread instances. [2021-06-10 14:32:34,701 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:34,701 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:34,701 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:34,701 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:34,701 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:34,701 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:34,701 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:34,701 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:34,701 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:34,702 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:34,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 641 places, 386 transitions, 17409 flow [2021-06-10 14:32:35,013 INFO L129 PetriNetUnfolder]: 0/767 cut-off events. [2021-06-10 14:32:35,013 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:35,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9277 conditions, 767 events. 0/767 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2975 event pairs, 0 based on Foata normal form. 0/639 useless extension candidates. Maximal degree in co-relation 0. Up to 128 conditions per place. [2021-06-10 14:32:35,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 641 places, 386 transitions, 17409 flow [2021-06-10 14:32:35,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 639 places, 384 transitions, 17405 flow [2021-06-10 14:32:35,019 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:35,020 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:35,020 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:35,020 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:35,020 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:35,020 INFO L82 PathProgramCache]: Analyzing trace with hash 801667, now seen corresponding path program 1 times [2021-06-10 14:32:35,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:35,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965487322] [2021-06-10 14:32:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:35,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:35,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:35,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965487322] [2021-06-10 14:32:35,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:35,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:35,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381132898] [2021-06-10 14:32:35,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:35,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:35,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:35,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:35,059 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 386 [2021-06-10 14:32:35,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 384 transitions, 17405 flow. Second operand has 3 states, 3 states have (on average 383.6666666666667) internal successors, (1151), 3 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:35,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:35,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 386 [2021-06-10 14:32:35,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:35,408 INFO L129 PetriNetUnfolder]: 0/383 cut-off events. [2021-06-10 14:32:35,408 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:35,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8895 conditions, 383 events. 0/383 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 739 event pairs, 0 based on Foata normal form. 128/511 useless extension candidates. Maximal degree in co-relation 0. Up to 128 conditions per place. [2021-06-10 14:32:35,409 INFO L132 encePairwiseOnDemand]: 384/386 looper letters, 0 selfloop transitions, 1 changer transitions 0/383 dead transitions. [2021-06-10 14:32:35,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 383 transitions, 17405 flow [2021-06-10 14:32:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1151 transitions. [2021-06-10 14:32:35,410 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9939550949913645 [2021-06-10 14:32:35,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1151 transitions. [2021-06-10 14:32:35,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1151 transitions. [2021-06-10 14:32:35,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:35,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1151 transitions. [2021-06-10 14:32:35,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 383.6666666666667) internal successors, (1151), 3 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:35,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:35,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:35,411 INFO L185 Difference]: Start difference. First operand has 639 places, 384 transitions, 17405 flow. Second operand 3 states and 1151 transitions. [2021-06-10 14:32:35,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 383 transitions, 17405 flow [2021-06-10 14:32:36,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 383 transitions, 1403 flow, removed 8001 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:36,086 INFO L241 Difference]: Finished difference. Result has 640 places, 383 transitions, 1403 flow [2021-06-10 14:32:36,086 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1403, PETRI_PLACES=640, PETRI_TRANSITIONS=383} [2021-06-10 14:32:36,087 INFO L343 CegarLoopForPetriNet]: 639 programPoint places, 1 predicate places. [2021-06-10 14:32:36,087 INFO L480 AbstractCegarLoop]: Abstraction has has 640 places, 383 transitions, 1403 flow [2021-06-10 14:32:36,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 383.6666666666667) internal successors, (1151), 3 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:36,087 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:36,087 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:36,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2021-06-10 14:32:36,087 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:36,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:36,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1463864931, now seen corresponding path program 1 times [2021-06-10 14:32:36,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:36,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214602883] [2021-06-10 14:32:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:36,123 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:36,125 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:36,157 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:36,157 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:36,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2021-06-10 14:32:36,157 WARN L342 ceAbstractionStarter]: 127 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:36,157 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 128 thread instances. [2021-06-10 14:32:36,254 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:36,254 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:36,255 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:36,255 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:36,255 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:36,255 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:36,255 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:36,255 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:36,255 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:36,255 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:36,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 646 places, 389 transitions, 17674 flow [2021-06-10 14:32:36,572 INFO L129 PetriNetUnfolder]: 0/773 cut-off events. [2021-06-10 14:32:36,572 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:36,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9414 conditions, 773 events. 0/773 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3015 event pairs, 0 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 0. Up to 129 conditions per place. [2021-06-10 14:32:36,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 646 places, 389 transitions, 17674 flow [2021-06-10 14:32:36,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 644 places, 387 transitions, 17670 flow [2021-06-10 14:32:36,579 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:36,579 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:36,579 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:36,579 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:36,579 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:36,579 INFO L82 PathProgramCache]: Analyzing trace with hash 814115, now seen corresponding path program 1 times [2021-06-10 14:32:36,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:36,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792822729] [2021-06-10 14:32:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:36,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:36,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:36,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792822729] [2021-06-10 14:32:36,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:36,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:36,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673799809] [2021-06-10 14:32:36,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:36,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:36,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:36,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:36,620 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 386 out of 389 [2021-06-10 14:32:36,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 387 transitions, 17670 flow. Second operand has 3 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:36,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:36,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 386 of 389 [2021-06-10 14:32:36,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:36,874 INFO L129 PetriNetUnfolder]: 0/386 cut-off events. [2021-06-10 14:32:36,874 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:36,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9029 conditions, 386 events. 0/386 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 766 event pairs, 0 based on Foata normal form. 129/515 useless extension candidates. Maximal degree in co-relation 0. Up to 129 conditions per place. [2021-06-10 14:32:36,875 INFO L132 encePairwiseOnDemand]: 387/389 looper letters, 0 selfloop transitions, 1 changer transitions 0/386 dead transitions. [2021-06-10 14:32:36,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 386 transitions, 17670 flow [2021-06-10 14:32:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1160 transitions. [2021-06-10 14:32:36,876 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9940017137960583 [2021-06-10 14:32:36,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1160 transitions. [2021-06-10 14:32:36,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1160 transitions. [2021-06-10 14:32:36,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:36,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1160 transitions. [2021-06-10 14:32:36,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:36,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:36,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:36,877 INFO L185 Difference]: Start difference. First operand has 644 places, 387 transitions, 17670 flow. Second operand 3 states and 1160 transitions. [2021-06-10 14:32:36,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 386 transitions, 17670 flow [2021-06-10 14:32:37,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 386 transitions, 1414 flow, removed 8128 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:37,628 INFO L241 Difference]: Finished difference. Result has 645 places, 386 transitions, 1414 flow [2021-06-10 14:32:37,628 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1414, PETRI_PLACES=645, PETRI_TRANSITIONS=386} [2021-06-10 14:32:37,628 INFO L343 CegarLoopForPetriNet]: 644 programPoint places, 1 predicate places. [2021-06-10 14:32:37,628 INFO L480 AbstractCegarLoop]: Abstraction has has 645 places, 386 transitions, 1414 flow [2021-06-10 14:32:37,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:37,628 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:37,628 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:37,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2021-06-10 14:32:37,628 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:37,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1931559704, now seen corresponding path program 1 times [2021-06-10 14:32:37,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:37,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872968707] [2021-06-10 14:32:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:37,665 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:37,668 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:37,699 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:37,699 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:37,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2021-06-10 14:32:37,699 WARN L342 ceAbstractionStarter]: 128 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:37,699 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 129 thread instances. [2021-06-10 14:32:37,800 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:37,801 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:37,801 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:37,801 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:37,801 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:37,801 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:37,801 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:37,801 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:37,801 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:37,801 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:37,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 651 places, 392 transitions, 17941 flow [2021-06-10 14:32:38,136 INFO L129 PetriNetUnfolder]: 0/779 cut-off events. [2021-06-10 14:32:38,136 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:38,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9552 conditions, 779 events. 0/779 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3008 event pairs, 0 based on Foata normal form. 0/649 useless extension candidates. Maximal degree in co-relation 0. Up to 130 conditions per place. [2021-06-10 14:32:38,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 651 places, 392 transitions, 17941 flow [2021-06-10 14:32:38,143 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 649 places, 390 transitions, 17937 flow [2021-06-10 14:32:38,143 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:38,143 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:38,143 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:38,144 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:38,144 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:38,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:38,144 INFO L82 PathProgramCache]: Analyzing trace with hash 826659, now seen corresponding path program 1 times [2021-06-10 14:32:38,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:38,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398784793] [2021-06-10 14:32:38,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:38,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:38,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:38,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398784793] [2021-06-10 14:32:38,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:38,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:38,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738875882] [2021-06-10 14:32:38,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:38,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:38,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:38,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:38,184 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 392 [2021-06-10 14:32:38,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 390 transitions, 17937 flow. Second operand has 3 states, 3 states have (on average 389.6666666666667) internal successors, (1169), 3 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:38,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:38,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 392 [2021-06-10 14:32:38,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:38,445 INFO L129 PetriNetUnfolder]: 0/389 cut-off events. [2021-06-10 14:32:38,445 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:38,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9164 conditions, 389 events. 0/389 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 774 event pairs, 0 based on Foata normal form. 130/519 useless extension candidates. Maximal degree in co-relation 0. Up to 130 conditions per place. [2021-06-10 14:32:38,446 INFO L132 encePairwiseOnDemand]: 390/392 looper letters, 0 selfloop transitions, 1 changer transitions 0/389 dead transitions. [2021-06-10 14:32:38,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 389 transitions, 17937 flow [2021-06-10 14:32:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1169 transitions. [2021-06-10 14:32:38,447 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9940476190476191 [2021-06-10 14:32:38,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1169 transitions. [2021-06-10 14:32:38,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1169 transitions. [2021-06-10 14:32:38,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:38,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1169 transitions. [2021-06-10 14:32:38,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 389.6666666666667) internal successors, (1169), 3 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:38,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:38,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:38,449 INFO L185 Difference]: Start difference. First operand has 649 places, 390 transitions, 17937 flow. Second operand 3 states and 1169 transitions. [2021-06-10 14:32:38,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 389 transitions, 17937 flow [2021-06-10 14:32:39,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 389 transitions, 1425 flow, removed 8256 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:39,274 INFO L241 Difference]: Finished difference. Result has 650 places, 389 transitions, 1425 flow [2021-06-10 14:32:39,274 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1425, PETRI_PLACES=650, PETRI_TRANSITIONS=389} [2021-06-10 14:32:39,274 INFO L343 CegarLoopForPetriNet]: 649 programPoint places, 1 predicate places. [2021-06-10 14:32:39,274 INFO L480 AbstractCegarLoop]: Abstraction has has 650 places, 389 transitions, 1425 flow [2021-06-10 14:32:39,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 389.6666666666667) internal successors, (1169), 3 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:39,275 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:39,275 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:39,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2021-06-10 14:32:39,275 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:39,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1029630775, now seen corresponding path program 1 times [2021-06-10 14:32:39,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:39,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098000171] [2021-06-10 14:32:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:39,311 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:39,313 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:39,344 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:39,344 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:39,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2021-06-10 14:32:39,344 WARN L342 ceAbstractionStarter]: 129 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:39,344 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 130 thread instances. [2021-06-10 14:32:39,439 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:39,439 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:39,440 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:39,440 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:39,440 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:39,440 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:39,440 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:39,440 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:39,440 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:39,440 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:39,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 656 places, 395 transitions, 18210 flow [2021-06-10 14:32:39,768 INFO L129 PetriNetUnfolder]: 0/785 cut-off events. [2021-06-10 14:32:39,768 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:39,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9691 conditions, 785 events. 0/785 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3092 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2021-06-10 14:32:39,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 656 places, 395 transitions, 18210 flow [2021-06-10 14:32:39,774 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 654 places, 393 transitions, 18206 flow [2021-06-10 14:32:39,775 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:39,775 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:39,775 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:39,775 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:39,775 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:39,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:39,775 INFO L82 PathProgramCache]: Analyzing trace with hash 839299, now seen corresponding path program 1 times [2021-06-10 14:32:39,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:39,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990307381] [2021-06-10 14:32:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:39,811 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:39,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:39,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990307381] [2021-06-10 14:32:39,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:39,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:39,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936751221] [2021-06-10 14:32:39,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:39,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:39,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:39,815 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 392 out of 395 [2021-06-10 14:32:39,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 393 transitions, 18206 flow. Second operand has 3 states, 3 states have (on average 392.6666666666667) internal successors, (1178), 3 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:39,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:39,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 392 of 395 [2021-06-10 14:32:39,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:40,150 INFO L129 PetriNetUnfolder]: 0/392 cut-off events. [2021-06-10 14:32:40,150 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:40,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9300 conditions, 392 events. 0/392 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 803 event pairs, 0 based on Foata normal form. 131/523 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2021-06-10 14:32:40,151 INFO L132 encePairwiseOnDemand]: 393/395 looper letters, 0 selfloop transitions, 1 changer transitions 0/392 dead transitions. [2021-06-10 14:32:40,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 392 transitions, 18206 flow [2021-06-10 14:32:40,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1178 transitions. [2021-06-10 14:32:40,152 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9940928270042194 [2021-06-10 14:32:40,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1178 transitions. [2021-06-10 14:32:40,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1178 transitions. [2021-06-10 14:32:40,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:40,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1178 transitions. [2021-06-10 14:32:40,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 392.6666666666667) internal successors, (1178), 3 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:40,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:40,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:40,154 INFO L185 Difference]: Start difference. First operand has 654 places, 393 transitions, 18206 flow. Second operand 3 states and 1178 transitions. [2021-06-10 14:32:40,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 392 transitions, 18206 flow [2021-06-10 14:32:40,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 392 transitions, 1436 flow, removed 8385 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:40,943 INFO L241 Difference]: Finished difference. Result has 655 places, 392 transitions, 1436 flow [2021-06-10 14:32:40,943 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=653, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1436, PETRI_PLACES=655, PETRI_TRANSITIONS=392} [2021-06-10 14:32:40,943 INFO L343 CegarLoopForPetriNet]: 654 programPoint places, 1 predicate places. [2021-06-10 14:32:40,943 INFO L480 AbstractCegarLoop]: Abstraction has has 655 places, 392 transitions, 1436 flow [2021-06-10 14:32:40,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 392.6666666666667) internal successors, (1178), 3 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:40,943 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:40,943 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:40,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2021-06-10 14:32:40,943 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2028284821, now seen corresponding path program 1 times [2021-06-10 14:32:40,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:40,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278337226] [2021-06-10 14:32:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:40,980 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:40,982 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:41,011 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:41,012 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:41,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2021-06-10 14:32:41,012 WARN L342 ceAbstractionStarter]: 130 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:41,012 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 131 thread instances. [2021-06-10 14:32:41,107 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:41,108 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:41,108 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:41,108 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:41,108 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:41,108 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:41,108 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:41,108 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:41,108 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:41,108 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:41,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 661 places, 398 transitions, 18481 flow [2021-06-10 14:32:41,447 INFO L129 PetriNetUnfolder]: 0/791 cut-off events. [2021-06-10 14:32:41,447 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:41,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9831 conditions, 791 events. 0/791 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3086 event pairs, 0 based on Foata normal form. 0/659 useless extension candidates. Maximal degree in co-relation 0. Up to 132 conditions per place. [2021-06-10 14:32:41,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 661 places, 398 transitions, 18481 flow [2021-06-10 14:32:41,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 659 places, 396 transitions, 18477 flow [2021-06-10 14:32:41,454 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:41,454 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:41,454 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:41,454 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:41,454 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:41,455 INFO L82 PathProgramCache]: Analyzing trace with hash 852035, now seen corresponding path program 1 times [2021-06-10 14:32:41,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:41,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384124707] [2021-06-10 14:32:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:41,492 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:41,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:41,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384124707] [2021-06-10 14:32:41,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:41,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:41,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151245294] [2021-06-10 14:32:41,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:41,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:41,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:41,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:41,495 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 398 [2021-06-10 14:32:41,495 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 396 transitions, 18477 flow. Second operand has 3 states, 3 states have (on average 395.6666666666667) internal successors, (1187), 3 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:41,495 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:41,495 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 398 [2021-06-10 14:32:41,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:41,760 INFO L129 PetriNetUnfolder]: 0/395 cut-off events. [2021-06-10 14:32:41,760 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:41,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9437 conditions, 395 events. 0/395 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 775 event pairs, 0 based on Foata normal form. 132/527 useless extension candidates. Maximal degree in co-relation 0. Up to 132 conditions per place. [2021-06-10 14:32:41,762 INFO L132 encePairwiseOnDemand]: 396/398 looper letters, 0 selfloop transitions, 1 changer transitions 0/395 dead transitions. [2021-06-10 14:32:41,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 395 transitions, 18477 flow [2021-06-10 14:32:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1187 transitions. [2021-06-10 14:32:41,762 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9941373534338358 [2021-06-10 14:32:41,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1187 transitions. [2021-06-10 14:32:41,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1187 transitions. [2021-06-10 14:32:41,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:41,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1187 transitions. [2021-06-10 14:32:41,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 395.6666666666667) internal successors, (1187), 3 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:41,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:41,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:41,764 INFO L185 Difference]: Start difference. First operand has 659 places, 396 transitions, 18477 flow. Second operand 3 states and 1187 transitions. [2021-06-10 14:32:41,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 395 transitions, 18477 flow [2021-06-10 14:32:42,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 660 places, 395 transitions, 1447 flow, removed 8515 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:42,614 INFO L241 Difference]: Finished difference. Result has 660 places, 395 transitions, 1447 flow [2021-06-10 14:32:42,614 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1447, PETRI_PLACES=660, PETRI_TRANSITIONS=395} [2021-06-10 14:32:42,614 INFO L343 CegarLoopForPetriNet]: 659 programPoint places, 1 predicate places. [2021-06-10 14:32:42,614 INFO L480 AbstractCegarLoop]: Abstraction has has 660 places, 395 transitions, 1447 flow [2021-06-10 14:32:42,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 395.6666666666667) internal successors, (1187), 3 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:42,615 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:42,615 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:42,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2021-06-10 14:32:42,615 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1854553793, now seen corresponding path program 1 times [2021-06-10 14:32:42,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:42,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348404176] [2021-06-10 14:32:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:42,652 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:42,655 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:42,686 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:42,687 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:42,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2021-06-10 14:32:42,687 WARN L342 ceAbstractionStarter]: 131 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:42,687 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 132 thread instances. [2021-06-10 14:32:42,784 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:42,785 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:42,785 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:42,785 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:42,785 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:42,785 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:42,785 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:42,785 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:42,792 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:42,792 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:42,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 666 places, 401 transitions, 18754 flow [2021-06-10 14:32:43,139 INFO L129 PetriNetUnfolder]: 0/797 cut-off events. [2021-06-10 14:32:43,139 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:43,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9972 conditions, 797 events. 0/797 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3090 event pairs, 0 based on Foata normal form. 0/664 useless extension candidates. Maximal degree in co-relation 0. Up to 133 conditions per place. [2021-06-10 14:32:43,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 666 places, 401 transitions, 18754 flow [2021-06-10 14:32:43,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 664 places, 399 transitions, 18750 flow [2021-06-10 14:32:43,146 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:43,146 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:43,146 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:43,146 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:43,146 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:43,146 INFO L82 PathProgramCache]: Analyzing trace with hash 864867, now seen corresponding path program 1 times [2021-06-10 14:32:43,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:43,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858344444] [2021-06-10 14:32:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:43,184 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:43,184 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:43,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858344444] [2021-06-10 14:32:43,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:43,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:43,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699850131] [2021-06-10 14:32:43,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:43,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:43,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:43,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:43,187 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 401 [2021-06-10 14:32:43,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 399 transitions, 18750 flow. Second operand has 3 states, 3 states have (on average 398.6666666666667) internal successors, (1196), 3 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:43,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:43,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 401 [2021-06-10 14:32:43,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:43,459 INFO L129 PetriNetUnfolder]: 0/398 cut-off events. [2021-06-10 14:32:43,459 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:43,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9575 conditions, 398 events. 0/398 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 812 event pairs, 0 based on Foata normal form. 133/531 useless extension candidates. Maximal degree in co-relation 0. Up to 133 conditions per place. [2021-06-10 14:32:43,460 INFO L132 encePairwiseOnDemand]: 399/401 looper letters, 0 selfloop transitions, 1 changer transitions 0/398 dead transitions. [2021-06-10 14:32:43,460 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 398 transitions, 18750 flow [2021-06-10 14:32:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:43,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1196 transitions. [2021-06-10 14:32:43,461 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9941812136325852 [2021-06-10 14:32:43,461 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1196 transitions. [2021-06-10 14:32:43,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1196 transitions. [2021-06-10 14:32:43,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:43,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1196 transitions. [2021-06-10 14:32:43,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 398.6666666666667) internal successors, (1196), 3 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:43,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:43,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:43,463 INFO L185 Difference]: Start difference. First operand has 664 places, 399 transitions, 18750 flow. Second operand 3 states and 1196 transitions. [2021-06-10 14:32:43,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 398 transitions, 18750 flow [2021-06-10 14:32:44,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 398 transitions, 1458 flow, removed 8646 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:44,325 INFO L241 Difference]: Finished difference. Result has 665 places, 398 transitions, 1458 flow [2021-06-10 14:32:44,325 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1458, PETRI_PLACES=665, PETRI_TRANSITIONS=398} [2021-06-10 14:32:44,325 INFO L343 CegarLoopForPetriNet]: 664 programPoint places, 1 predicate places. [2021-06-10 14:32:44,325 INFO L480 AbstractCegarLoop]: Abstraction has has 665 places, 398 transitions, 1458 flow [2021-06-10 14:32:44,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 398.6666666666667) internal successors, (1196), 3 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:44,325 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:44,325 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:44,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2021-06-10 14:32:44,325 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:44,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:44,325 INFO L82 PathProgramCache]: Analyzing trace with hash -572446674, now seen corresponding path program 1 times [2021-06-10 14:32:44,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:44,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530200209] [2021-06-10 14:32:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:44,363 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:44,365 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:44,397 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:44,397 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:44,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2021-06-10 14:32:44,397 WARN L342 ceAbstractionStarter]: 132 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:44,397 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 133 thread instances. [2021-06-10 14:32:44,495 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:44,495 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:44,495 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:44,495 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:44,495 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:44,495 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:44,495 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:44,495 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:44,495 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:44,495 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:44,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 671 places, 404 transitions, 19029 flow [2021-06-10 14:32:44,957 INFO L129 PetriNetUnfolder]: 0/803 cut-off events. [2021-06-10 14:32:44,957 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:44,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10114 conditions, 803 events. 0/803 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3142 event pairs, 0 based on Foata normal form. 0/669 useless extension candidates. Maximal degree in co-relation 0. Up to 134 conditions per place. [2021-06-10 14:32:44,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 671 places, 404 transitions, 19029 flow [2021-06-10 14:32:44,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 669 places, 402 transitions, 19025 flow [2021-06-10 14:32:44,964 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:44,964 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:44,964 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:44,964 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:44,964 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:44,964 INFO L82 PathProgramCache]: Analyzing trace with hash 877795, now seen corresponding path program 1 times [2021-06-10 14:32:44,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:44,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795648352] [2021-06-10 14:32:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:45,000 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:45,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:45,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795648352] [2021-06-10 14:32:45,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:45,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:45,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341993463] [2021-06-10 14:32:45,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:45,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:45,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:45,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:45,003 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 401 out of 404 [2021-06-10 14:32:45,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 402 transitions, 19025 flow. Second operand has 3 states, 3 states have (on average 401.6666666666667) internal successors, (1205), 3 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:45,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:45,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 401 of 404 [2021-06-10 14:32:45,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:45,275 INFO L129 PetriNetUnfolder]: 0/401 cut-off events. [2021-06-10 14:32:45,276 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:45,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9714 conditions, 401 events. 0/401 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 799 event pairs, 0 based on Foata normal form. 134/535 useless extension candidates. Maximal degree in co-relation 0. Up to 134 conditions per place. [2021-06-10 14:32:45,277 INFO L132 encePairwiseOnDemand]: 402/404 looper letters, 0 selfloop transitions, 1 changer transitions 0/401 dead transitions. [2021-06-10 14:32:45,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 401 transitions, 19025 flow [2021-06-10 14:32:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:45,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1205 transitions. [2021-06-10 14:32:45,278 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9942244224422442 [2021-06-10 14:32:45,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1205 transitions. [2021-06-10 14:32:45,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1205 transitions. [2021-06-10 14:32:45,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:45,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1205 transitions. [2021-06-10 14:32:45,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 401.6666666666667) internal successors, (1205), 3 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:45,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:45,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:45,279 INFO L185 Difference]: Start difference. First operand has 669 places, 402 transitions, 19025 flow. Second operand 3 states and 1205 transitions. [2021-06-10 14:32:45,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 401 transitions, 19025 flow [2021-06-10 14:32:46,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 670 places, 401 transitions, 1469 flow, removed 8778 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:46,118 INFO L241 Difference]: Finished difference. Result has 670 places, 401 transitions, 1469 flow [2021-06-10 14:32:46,118 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1469, PETRI_PLACES=670, PETRI_TRANSITIONS=401} [2021-06-10 14:32:46,118 INFO L343 CegarLoopForPetriNet]: 669 programPoint places, 1 predicate places. [2021-06-10 14:32:46,118 INFO L480 AbstractCegarLoop]: Abstraction has has 670 places, 401 transitions, 1469 flow [2021-06-10 14:32:46,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 401.6666666666667) internal successors, (1205), 3 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:46,118 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:46,118 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:46,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2021-06-10 14:32:46,118 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:46,118 INFO L82 PathProgramCache]: Analyzing trace with hash 146985733, now seen corresponding path program 1 times [2021-06-10 14:32:46,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:46,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896193847] [2021-06-10 14:32:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:46,155 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:46,157 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:46,189 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:46,189 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:46,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2021-06-10 14:32:46,189 WARN L342 ceAbstractionStarter]: 133 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:46,189 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 134 thread instances. [2021-06-10 14:32:46,292 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:46,292 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:46,292 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:46,292 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:46,292 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:46,292 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:46,292 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:46,292 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:46,292 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:46,292 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:46,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 676 places, 407 transitions, 19306 flow [2021-06-10 14:32:46,649 INFO L129 PetriNetUnfolder]: 0/809 cut-off events. [2021-06-10 14:32:46,649 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:46,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10257 conditions, 809 events. 0/809 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3107 event pairs, 0 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2021-06-10 14:32:46,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 676 places, 407 transitions, 19306 flow [2021-06-10 14:32:46,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 674 places, 405 transitions, 19302 flow [2021-06-10 14:32:46,656 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:46,656 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:46,656 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:46,657 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:46,657 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash 890819, now seen corresponding path program 1 times [2021-06-10 14:32:46,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:46,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66320734] [2021-06-10 14:32:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:46,695 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:46,695 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:46,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66320734] [2021-06-10 14:32:46,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:46,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:46,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751506861] [2021-06-10 14:32:46,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:46,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:46,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:46,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:46,698 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 404 out of 407 [2021-06-10 14:32:46,699 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 405 transitions, 19302 flow. Second operand has 3 states, 3 states have (on average 404.6666666666667) internal successors, (1214), 3 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:46,699 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:46,699 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 404 of 407 [2021-06-10 14:32:46,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:46,977 INFO L129 PetriNetUnfolder]: 0/404 cut-off events. [2021-06-10 14:32:46,977 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:46,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9854 conditions, 404 events. 0/404 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 787 event pairs, 0 based on Foata normal form. 135/539 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2021-06-10 14:32:46,978 INFO L132 encePairwiseOnDemand]: 405/407 looper letters, 0 selfloop transitions, 1 changer transitions 0/404 dead transitions. [2021-06-10 14:32:46,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 404 transitions, 19302 flow [2021-06-10 14:32:46,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1214 transitions. [2021-06-10 14:32:46,979 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9942669942669943 [2021-06-10 14:32:46,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1214 transitions. [2021-06-10 14:32:46,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1214 transitions. [2021-06-10 14:32:46,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:46,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1214 transitions. [2021-06-10 14:32:46,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 404.6666666666667) internal successors, (1214), 3 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:46,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:46,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:46,981 INFO L185 Difference]: Start difference. First operand has 674 places, 405 transitions, 19302 flow. Second operand 3 states and 1214 transitions. [2021-06-10 14:32:46,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 404 transitions, 19302 flow [2021-06-10 14:32:47,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 404 transitions, 1480 flow, removed 8911 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:47,839 INFO L241 Difference]: Finished difference. Result has 675 places, 404 transitions, 1480 flow [2021-06-10 14:32:47,839 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1480, PETRI_PLACES=675, PETRI_TRANSITIONS=404} [2021-06-10 14:32:47,839 INFO L343 CegarLoopForPetriNet]: 674 programPoint places, 1 predicate places. [2021-06-10 14:32:47,839 INFO L480 AbstractCegarLoop]: Abstraction has has 675 places, 404 transitions, 1480 flow [2021-06-10 14:32:47,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 404.6666666666667) internal successors, (1214), 3 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:47,839 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:47,839 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:47,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2021-06-10 14:32:47,840 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:47,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:47,840 INFO L82 PathProgramCache]: Analyzing trace with hash 461665457, now seen corresponding path program 1 times [2021-06-10 14:32:47,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:47,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878952798] [2021-06-10 14:32:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:47,879 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:47,881 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:47,915 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:47,915 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:47,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2021-06-10 14:32:47,915 WARN L342 ceAbstractionStarter]: 134 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:47,915 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 135 thread instances. [2021-06-10 14:32:48,016 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:48,016 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:48,017 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:48,017 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:48,017 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:48,017 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:48,017 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:48,017 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:48,017 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:48,017 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:48,021 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 681 places, 410 transitions, 19585 flow [2021-06-10 14:32:48,384 INFO L129 PetriNetUnfolder]: 0/815 cut-off events. [2021-06-10 14:32:48,384 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:48,384 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10401 conditions, 815 events. 0/815 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3150 event pairs, 0 based on Foata normal form. 0/679 useless extension candidates. Maximal degree in co-relation 0. Up to 136 conditions per place. [2021-06-10 14:32:48,384 INFO L82 GeneralOperation]: Start removeDead. Operand has 681 places, 410 transitions, 19585 flow [2021-06-10 14:32:48,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 679 places, 408 transitions, 19581 flow [2021-06-10 14:32:48,391 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:48,391 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:48,391 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:48,391 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:48,391 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:48,392 INFO L82 PathProgramCache]: Analyzing trace with hash 903939, now seen corresponding path program 1 times [2021-06-10 14:32:48,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:48,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277780265] [2021-06-10 14:32:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:48,432 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:48,432 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:48,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277780265] [2021-06-10 14:32:48,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:48,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:48,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674176631] [2021-06-10 14:32:48,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:48,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:48,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:48,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:48,436 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 407 out of 410 [2021-06-10 14:32:48,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 408 transitions, 19581 flow. Second operand has 3 states, 3 states have (on average 407.6666666666667) internal successors, (1223), 3 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:48,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:48,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 407 of 410 [2021-06-10 14:32:48,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:48,720 INFO L129 PetriNetUnfolder]: 0/407 cut-off events. [2021-06-10 14:32:48,720 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:48,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9995 conditions, 407 events. 0/407 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 834 event pairs, 0 based on Foata normal form. 136/543 useless extension candidates. Maximal degree in co-relation 0. Up to 136 conditions per place. [2021-06-10 14:32:48,721 INFO L132 encePairwiseOnDemand]: 408/410 looper letters, 0 selfloop transitions, 1 changer transitions 0/407 dead transitions. [2021-06-10 14:32:48,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 407 transitions, 19581 flow [2021-06-10 14:32:48,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1223 transitions. [2021-06-10 14:32:48,722 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9943089430894309 [2021-06-10 14:32:48,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1223 transitions. [2021-06-10 14:32:48,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1223 transitions. [2021-06-10 14:32:48,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:48,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1223 transitions. [2021-06-10 14:32:48,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 407.6666666666667) internal successors, (1223), 3 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:48,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:48,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:48,724 INFO L185 Difference]: Start difference. First operand has 679 places, 408 transitions, 19581 flow. Second operand 3 states and 1223 transitions. [2021-06-10 14:32:48,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 407 transitions, 19581 flow [2021-06-10 14:32:49,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 407 transitions, 1491 flow, removed 9045 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:49,577 INFO L241 Difference]: Finished difference. Result has 680 places, 407 transitions, 1491 flow [2021-06-10 14:32:49,577 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1491, PETRI_PLACES=680, PETRI_TRANSITIONS=407} [2021-06-10 14:32:49,577 INFO L343 CegarLoopForPetriNet]: 679 programPoint places, 1 predicate places. [2021-06-10 14:32:49,577 INFO L480 AbstractCegarLoop]: Abstraction has has 680 places, 407 transitions, 1491 flow [2021-06-10 14:32:49,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 407.6666666666667) internal successors, (1223), 3 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:49,577 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:49,577 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:49,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2021-06-10 14:32:49,577 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:49,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1283377899, now seen corresponding path program 1 times [2021-06-10 14:32:49,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:49,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948399565] [2021-06-10 14:32:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:49,622 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:49,624 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:49,657 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:49,657 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:49,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2021-06-10 14:32:49,658 WARN L342 ceAbstractionStarter]: 135 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:49,658 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 136 thread instances. [2021-06-10 14:32:49,807 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:49,808 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:49,808 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:49,808 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:49,808 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:49,808 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:49,808 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:49,808 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:49,808 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:49,808 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:49,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 686 places, 413 transitions, 19866 flow [2021-06-10 14:32:50,173 INFO L129 PetriNetUnfolder]: 0/821 cut-off events. [2021-06-10 14:32:50,173 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:50,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10546 conditions, 821 events. 0/821 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3242 event pairs, 0 based on Foata normal form. 0/684 useless extension candidates. Maximal degree in co-relation 0. Up to 137 conditions per place. [2021-06-10 14:32:50,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 686 places, 413 transitions, 19866 flow [2021-06-10 14:32:50,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 684 places, 411 transitions, 19862 flow [2021-06-10 14:32:50,180 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:50,180 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:50,180 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:50,180 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:50,180 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:50,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:50,180 INFO L82 PathProgramCache]: Analyzing trace with hash 917155, now seen corresponding path program 1 times [2021-06-10 14:32:50,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:50,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058431371] [2021-06-10 14:32:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:50,223 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:50,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:50,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058431371] [2021-06-10 14:32:50,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:50,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:50,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243973241] [2021-06-10 14:32:50,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:50,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:50,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:50,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:50,227 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 410 out of 413 [2021-06-10 14:32:50,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 411 transitions, 19862 flow. Second operand has 3 states, 3 states have (on average 410.6666666666667) internal successors, (1232), 3 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:50,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:50,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 410 of 413 [2021-06-10 14:32:50,227 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:50,514 INFO L129 PetriNetUnfolder]: 0/410 cut-off events. [2021-06-10 14:32:50,514 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:50,514 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10137 conditions, 410 events. 0/410 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 725 event pairs, 0 based on Foata normal form. 137/547 useless extension candidates. Maximal degree in co-relation 0. Up to 137 conditions per place. [2021-06-10 14:32:50,515 INFO L132 encePairwiseOnDemand]: 411/413 looper letters, 0 selfloop transitions, 1 changer transitions 0/410 dead transitions. [2021-06-10 14:32:50,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 410 transitions, 19862 flow [2021-06-10 14:32:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1232 transitions. [2021-06-10 14:32:50,516 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9943502824858758 [2021-06-10 14:32:50,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1232 transitions. [2021-06-10 14:32:50,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1232 transitions. [2021-06-10 14:32:50,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:50,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1232 transitions. [2021-06-10 14:32:50,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 410.6666666666667) internal successors, (1232), 3 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:50,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:50,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:50,517 INFO L185 Difference]: Start difference. First operand has 684 places, 411 transitions, 19862 flow. Second operand 3 states and 1232 transitions. [2021-06-10 14:32:50,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 685 places, 410 transitions, 19862 flow [2021-06-10 14:32:51,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 685 places, 410 transitions, 1502 flow, removed 9180 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:51,383 INFO L241 Difference]: Finished difference. Result has 685 places, 410 transitions, 1502 flow [2021-06-10 14:32:51,383 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1502, PETRI_PLACES=685, PETRI_TRANSITIONS=410} [2021-06-10 14:32:51,383 INFO L343 CegarLoopForPetriNet]: 684 programPoint places, 1 predicate places. [2021-06-10 14:32:51,383 INFO L480 AbstractCegarLoop]: Abstraction has has 685 places, 410 transitions, 1502 flow [2021-06-10 14:32:51,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 410.6666666666667) internal successors, (1232), 3 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:51,383 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:51,383 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:51,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2021-06-10 14:32:51,383 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:51,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:51,384 INFO L82 PathProgramCache]: Analyzing trace with hash -622774668, now seen corresponding path program 1 times [2021-06-10 14:32:51,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:51,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178442817] [2021-06-10 14:32:51,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:51,428 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:51,430 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:51,465 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:51,465 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:51,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2021-06-10 14:32:51,465 WARN L342 ceAbstractionStarter]: 136 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:51,465 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 137 thread instances. [2021-06-10 14:32:51,565 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:51,566 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:51,566 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:51,566 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:51,566 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:51,566 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:51,566 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:51,566 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:51,566 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:51,566 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:51,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 691 places, 416 transitions, 20149 flow [2021-06-10 14:32:51,944 INFO L129 PetriNetUnfolder]: 0/827 cut-off events. [2021-06-10 14:32:51,945 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:51,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10692 conditions, 827 events. 0/827 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3197 event pairs, 0 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 0. Up to 138 conditions per place. [2021-06-10 14:32:51,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 691 places, 416 transitions, 20149 flow [2021-06-10 14:32:51,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 689 places, 414 transitions, 20145 flow [2021-06-10 14:32:51,952 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:51,952 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:51,952 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:51,952 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:51,952 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:51,952 INFO L82 PathProgramCache]: Analyzing trace with hash 930467, now seen corresponding path program 1 times [2021-06-10 14:32:51,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:51,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612156966] [2021-06-10 14:32:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:52,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:52,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:52,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612156966] [2021-06-10 14:32:52,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:52,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:52,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894031820] [2021-06-10 14:32:52,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:52,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:52,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:52,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:52,011 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 413 out of 416 [2021-06-10 14:32:52,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 414 transitions, 20145 flow. Second operand has 3 states, 3 states have (on average 413.6666666666667) internal successors, (1241), 3 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:52,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:52,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 413 of 416 [2021-06-10 14:32:52,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:52,311 INFO L129 PetriNetUnfolder]: 0/413 cut-off events. [2021-06-10 14:32:52,311 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:52,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10280 conditions, 413 events. 0/413 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 845 event pairs, 0 based on Foata normal form. 138/551 useless extension candidates. Maximal degree in co-relation 0. Up to 138 conditions per place. [2021-06-10 14:32:52,312 INFO L132 encePairwiseOnDemand]: 414/416 looper letters, 0 selfloop transitions, 1 changer transitions 0/413 dead transitions. [2021-06-10 14:32:52,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 413 transitions, 20145 flow [2021-06-10 14:32:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1241 transitions. [2021-06-10 14:32:52,313 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9943910256410257 [2021-06-10 14:32:52,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1241 transitions. [2021-06-10 14:32:52,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1241 transitions. [2021-06-10 14:32:52,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:52,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1241 transitions. [2021-06-10 14:32:52,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 413.6666666666667) internal successors, (1241), 3 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:52,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:52,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:52,314 INFO L185 Difference]: Start difference. First operand has 689 places, 414 transitions, 20145 flow. Second operand 3 states and 1241 transitions. [2021-06-10 14:32:52,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 413 transitions, 20145 flow [2021-06-10 14:32:53,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 690 places, 413 transitions, 1513 flow, removed 9316 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:53,200 INFO L241 Difference]: Finished difference. Result has 690 places, 413 transitions, 1513 flow [2021-06-10 14:32:53,200 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1513, PETRI_PLACES=690, PETRI_TRANSITIONS=413} [2021-06-10 14:32:53,200 INFO L343 CegarLoopForPetriNet]: 689 programPoint places, 1 predicate places. [2021-06-10 14:32:53,200 INFO L480 AbstractCegarLoop]: Abstraction has has 690 places, 413 transitions, 1513 flow [2021-06-10 14:32:53,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 413.6666666666667) internal successors, (1241), 3 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:53,200 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:53,200 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:53,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2021-06-10 14:32:53,200 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:53,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:53,201 INFO L82 PathProgramCache]: Analyzing trace with hash 947521649, now seen corresponding path program 1 times [2021-06-10 14:32:53,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:53,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543365951] [2021-06-10 14:32:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:53,246 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:53,248 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:53,282 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:53,283 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:53,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2021-06-10 14:32:53,283 WARN L342 ceAbstractionStarter]: 137 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:53,283 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 138 thread instances. [2021-06-10 14:32:53,385 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:53,385 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:53,386 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:53,386 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:53,386 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:53,386 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:53,386 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:53,386 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:53,386 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:53,386 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:53,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 696 places, 419 transitions, 20434 flow [2021-06-10 14:32:53,776 INFO L129 PetriNetUnfolder]: 0/833 cut-off events. [2021-06-10 14:32:53,776 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:53,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10839 conditions, 833 events. 0/833 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3256 event pairs, 0 based on Foata normal form. 0/694 useless extension candidates. Maximal degree in co-relation 0. Up to 139 conditions per place. [2021-06-10 14:32:53,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 696 places, 419 transitions, 20434 flow [2021-06-10 14:32:53,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 694 places, 417 transitions, 20430 flow [2021-06-10 14:32:53,783 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:53,784 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:53,784 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:53,784 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:53,784 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:53,784 INFO L82 PathProgramCache]: Analyzing trace with hash 943875, now seen corresponding path program 1 times [2021-06-10 14:32:53,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:53,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421385020] [2021-06-10 14:32:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:53,830 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:53,830 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:53,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421385020] [2021-06-10 14:32:53,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:53,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:53,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14520795] [2021-06-10 14:32:53,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:53,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:53,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:53,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:53,833 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 416 out of 419 [2021-06-10 14:32:53,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 417 transitions, 20430 flow. Second operand has 3 states, 3 states have (on average 416.6666666666667) internal successors, (1250), 3 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:53,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:53,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 416 of 419 [2021-06-10 14:32:53,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:54,249 INFO L129 PetriNetUnfolder]: 0/416 cut-off events. [2021-06-10 14:32:54,249 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:54,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10424 conditions, 416 events. 0/416 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 805 event pairs, 0 based on Foata normal form. 139/555 useless extension candidates. Maximal degree in co-relation 0. Up to 139 conditions per place. [2021-06-10 14:32:54,250 INFO L132 encePairwiseOnDemand]: 417/419 looper letters, 0 selfloop transitions, 1 changer transitions 0/416 dead transitions. [2021-06-10 14:32:54,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 416 transitions, 20430 flow [2021-06-10 14:32:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1250 transitions. [2021-06-10 14:32:54,251 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.994431185361973 [2021-06-10 14:32:54,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1250 transitions. [2021-06-10 14:32:54,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1250 transitions. [2021-06-10 14:32:54,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:54,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1250 transitions. [2021-06-10 14:32:54,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 416.6666666666667) internal successors, (1250), 3 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:54,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:54,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:54,253 INFO L185 Difference]: Start difference. First operand has 694 places, 417 transitions, 20430 flow. Second operand 3 states and 1250 transitions. [2021-06-10 14:32:54,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 416 transitions, 20430 flow [2021-06-10 14:32:55,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 695 places, 416 transitions, 1524 flow, removed 9453 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:55,146 INFO L241 Difference]: Finished difference. Result has 695 places, 416 transitions, 1524 flow [2021-06-10 14:32:55,146 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=693, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1524, PETRI_PLACES=695, PETRI_TRANSITIONS=416} [2021-06-10 14:32:55,146 INFO L343 CegarLoopForPetriNet]: 694 programPoint places, 1 predicate places. [2021-06-10 14:32:55,146 INFO L480 AbstractCegarLoop]: Abstraction has has 695 places, 416 transitions, 1524 flow [2021-06-10 14:32:55,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 416.6666666666667) internal successors, (1250), 3 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:55,147 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:55,147 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:55,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2021-06-10 14:32:55,147 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:55,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:55,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1194481161, now seen corresponding path program 1 times [2021-06-10 14:32:55,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:55,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338755258] [2021-06-10 14:32:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:55,196 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:55,198 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:55,233 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:55,233 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:55,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2021-06-10 14:32:55,234 WARN L342 ceAbstractionStarter]: 138 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:55,234 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 139 thread instances. [2021-06-10 14:32:55,334 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:55,335 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:55,335 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:55,335 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:55,335 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:55,335 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:55,335 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:55,335 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:55,335 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:55,335 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:55,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 701 places, 422 transitions, 20721 flow [2021-06-10 14:32:55,732 INFO L129 PetriNetUnfolder]: 0/839 cut-off events. [2021-06-10 14:32:55,732 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:55,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10987 conditions, 839 events. 0/839 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3316 event pairs, 0 based on Foata normal form. 0/699 useless extension candidates. Maximal degree in co-relation 0. Up to 140 conditions per place. [2021-06-10 14:32:55,732 INFO L82 GeneralOperation]: Start removeDead. Operand has 701 places, 422 transitions, 20721 flow [2021-06-10 14:32:55,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 699 places, 420 transitions, 20717 flow [2021-06-10 14:32:55,740 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:55,740 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:55,740 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:55,740 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:55,740 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:55,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:55,740 INFO L82 PathProgramCache]: Analyzing trace with hash 957379, now seen corresponding path program 1 times [2021-06-10 14:32:55,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:55,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284961321] [2021-06-10 14:32:55,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:55,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:55,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:55,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284961321] [2021-06-10 14:32:55,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:55,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:55,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688381094] [2021-06-10 14:32:55,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:55,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:55,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:55,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:55,788 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 419 out of 422 [2021-06-10 14:32:55,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 420 transitions, 20717 flow. Second operand has 3 states, 3 states have (on average 419.6666666666667) internal successors, (1259), 3 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:55,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:55,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 419 of 422 [2021-06-10 14:32:55,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:56,097 INFO L129 PetriNetUnfolder]: 0/419 cut-off events. [2021-06-10 14:32:56,097 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:56,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10569 conditions, 419 events. 0/419 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 802 event pairs, 0 based on Foata normal form. 140/559 useless extension candidates. Maximal degree in co-relation 0. Up to 140 conditions per place. [2021-06-10 14:32:56,099 INFO L132 encePairwiseOnDemand]: 420/422 looper letters, 0 selfloop transitions, 1 changer transitions 0/419 dead transitions. [2021-06-10 14:32:56,099 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 419 transitions, 20717 flow [2021-06-10 14:32:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:56,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1259 transitions. [2021-06-10 14:32:56,099 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9944707740916272 [2021-06-10 14:32:56,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1259 transitions. [2021-06-10 14:32:56,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1259 transitions. [2021-06-10 14:32:56,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:56,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1259 transitions. [2021-06-10 14:32:56,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 419.6666666666667) internal successors, (1259), 3 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:56,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:56,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:56,101 INFO L185 Difference]: Start difference. First operand has 699 places, 420 transitions, 20717 flow. Second operand 3 states and 1259 transitions. [2021-06-10 14:32:56,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 419 transitions, 20717 flow [2021-06-10 14:32:56,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 419 transitions, 1535 flow, removed 9591 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:56,982 INFO L241 Difference]: Finished difference. Result has 700 places, 419 transitions, 1535 flow [2021-06-10 14:32:56,982 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1535, PETRI_PLACES=700, PETRI_TRANSITIONS=419} [2021-06-10 14:32:56,982 INFO L343 CegarLoopForPetriNet]: 699 programPoint places, 1 predicate places. [2021-06-10 14:32:56,982 INFO L480 AbstractCegarLoop]: Abstraction has has 700 places, 419 transitions, 1535 flow [2021-06-10 14:32:56,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 419.6666666666667) internal successors, (1259), 3 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:56,983 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:56,983 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:56,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2021-06-10 14:32:56,983 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:56,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1685074073, now seen corresponding path program 1 times [2021-06-10 14:32:56,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:56,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196917086] [2021-06-10 14:32:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:57,029 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:57,031 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:57,066 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:57,066 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:57,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2021-06-10 14:32:57,066 WARN L342 ceAbstractionStarter]: 139 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:57,066 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 140 thread instances. [2021-06-10 14:32:57,168 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:57,168 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:57,168 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:57,168 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:57,168 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:57,168 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:57,168 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:57,168 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:57,168 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:57,168 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:57,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 706 places, 425 transitions, 21010 flow [2021-06-10 14:32:57,570 INFO L129 PetriNetUnfolder]: 0/845 cut-off events. [2021-06-10 14:32:57,570 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:57,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11136 conditions, 845 events. 0/845 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3345 event pairs, 0 based on Foata normal form. 0/704 useless extension candidates. Maximal degree in co-relation 0. Up to 141 conditions per place. [2021-06-10 14:32:57,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 706 places, 425 transitions, 21010 flow [2021-06-10 14:32:57,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 704 places, 423 transitions, 21006 flow [2021-06-10 14:32:57,578 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:32:57,578 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:57,578 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:57,578 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:57,578 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:57,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:57,578 INFO L82 PathProgramCache]: Analyzing trace with hash 970979, now seen corresponding path program 1 times [2021-06-10 14:32:57,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:57,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664583049] [2021-06-10 14:32:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:57,625 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:57,625 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:57,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664583049] [2021-06-10 14:32:57,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:57,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:57,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411886108] [2021-06-10 14:32:57,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:57,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:57,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:57,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:57,628 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 422 out of 425 [2021-06-10 14:32:57,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 423 transitions, 21006 flow. Second operand has 3 states, 3 states have (on average 422.6666666666667) internal successors, (1268), 3 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:57,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:57,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 422 of 425 [2021-06-10 14:32:57,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:57,942 INFO L129 PetriNetUnfolder]: 0/422 cut-off events. [2021-06-10 14:32:57,942 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:57,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10715 conditions, 422 events. 0/422 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 882 event pairs, 0 based on Foata normal form. 141/563 useless extension candidates. Maximal degree in co-relation 0. Up to 141 conditions per place. [2021-06-10 14:32:57,943 INFO L132 encePairwiseOnDemand]: 423/425 looper letters, 0 selfloop transitions, 1 changer transitions 0/422 dead transitions. [2021-06-10 14:32:57,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 422 transitions, 21006 flow [2021-06-10 14:32:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:57,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1268 transitions. [2021-06-10 14:32:57,944 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9945098039215686 [2021-06-10 14:32:57,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1268 transitions. [2021-06-10 14:32:57,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1268 transitions. [2021-06-10 14:32:57,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:57,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1268 transitions. [2021-06-10 14:32:57,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 422.6666666666667) internal successors, (1268), 3 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:57,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:57,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:57,945 INFO L185 Difference]: Start difference. First operand has 704 places, 423 transitions, 21006 flow. Second operand 3 states and 1268 transitions. [2021-06-10 14:32:57,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 705 places, 422 transitions, 21006 flow [2021-06-10 14:32:58,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 422 transitions, 1546 flow, removed 9730 selfloop flow, removed 0 redundant places. [2021-06-10 14:32:58,850 INFO L241 Difference]: Finished difference. Result has 705 places, 422 transitions, 1546 flow [2021-06-10 14:32:58,850 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=703, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1546, PETRI_PLACES=705, PETRI_TRANSITIONS=422} [2021-06-10 14:32:58,850 INFO L343 CegarLoopForPetriNet]: 704 programPoint places, 1 predicate places. [2021-06-10 14:32:58,850 INFO L480 AbstractCegarLoop]: Abstraction has has 705 places, 422 transitions, 1546 flow [2021-06-10 14:32:58,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 422.6666666666667) internal successors, (1268), 3 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:58,850 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:58,850 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:32:58,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2021-06-10 14:32:58,850 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:58,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1953903686, now seen corresponding path program 1 times [2021-06-10 14:32:58,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:58,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819441638] [2021-06-10 14:32:58,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:58,896 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:32:58,898 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:32:58,934 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:32:58,934 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:32:58,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2021-06-10 14:32:58,934 WARN L342 ceAbstractionStarter]: 140 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:32:58,935 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 141 thread instances. [2021-06-10 14:32:59,037 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:32:59,037 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:32:59,038 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:32:59,038 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:32:59,038 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:32:59,038 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:32:59,038 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:32:59,038 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:32:59,038 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:32:59,038 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:32:59,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 711 places, 428 transitions, 21301 flow [2021-06-10 14:32:59,498 INFO L129 PetriNetUnfolder]: 0/851 cut-off events. [2021-06-10 14:32:59,499 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:59,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11286 conditions, 851 events. 0/851 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3262 event pairs, 0 based on Foata normal form. 0/709 useless extension candidates. Maximal degree in co-relation 0. Up to 142 conditions per place. [2021-06-10 14:32:59,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 711 places, 428 transitions, 21301 flow [2021-06-10 14:32:59,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 709 places, 426 transitions, 21297 flow [2021-06-10 14:32:59,506 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:32:59,506 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:59,506 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:32:59,506 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:32:59,506 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:32:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:32:59,506 INFO L82 PathProgramCache]: Analyzing trace with hash 984675, now seen corresponding path program 1 times [2021-06-10 14:32:59,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:32:59,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333365960] [2021-06-10 14:32:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:32:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:32:59,557 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:32:59,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:32:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:32:59,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333365960] [2021-06-10 14:32:59,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:32:59,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:32:59,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307853771] [2021-06-10 14:32:59,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:32:59,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:32:59,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:32:59,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:32:59,560 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 425 out of 428 [2021-06-10 14:32:59,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 426 transitions, 21297 flow. Second operand has 3 states, 3 states have (on average 425.6666666666667) internal successors, (1277), 3 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:59,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:32:59,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 425 of 428 [2021-06-10 14:32:59,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:32:59,879 INFO L129 PetriNetUnfolder]: 0/425 cut-off events. [2021-06-10 14:32:59,879 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:32:59,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10862 conditions, 425 events. 0/425 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 859 event pairs, 0 based on Foata normal form. 142/567 useless extension candidates. Maximal degree in co-relation 0. Up to 142 conditions per place. [2021-06-10 14:32:59,880 INFO L132 encePairwiseOnDemand]: 426/428 looper letters, 0 selfloop transitions, 1 changer transitions 0/425 dead transitions. [2021-06-10 14:32:59,880 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 425 transitions, 21297 flow [2021-06-10 14:32:59,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:32:59,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:32:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1277 transitions. [2021-06-10 14:32:59,881 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9945482866043613 [2021-06-10 14:32:59,881 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1277 transitions. [2021-06-10 14:32:59,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1277 transitions. [2021-06-10 14:32:59,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:32:59,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1277 transitions. [2021-06-10 14:32:59,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 425.6666666666667) internal successors, (1277), 3 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:59,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:59,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:32:59,882 INFO L185 Difference]: Start difference. First operand has 709 places, 426 transitions, 21297 flow. Second operand 3 states and 1277 transitions. [2021-06-10 14:32:59,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 425 transitions, 21297 flow [2021-06-10 14:33:00,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 710 places, 425 transitions, 1557 flow, removed 9870 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:00,756 INFO L241 Difference]: Finished difference. Result has 710 places, 425 transitions, 1557 flow [2021-06-10 14:33:00,756 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=708, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1557, PETRI_PLACES=710, PETRI_TRANSITIONS=425} [2021-06-10 14:33:00,756 INFO L343 CegarLoopForPetriNet]: 709 programPoint places, 1 predicate places. [2021-06-10 14:33:00,756 INFO L480 AbstractCegarLoop]: Abstraction has has 710 places, 425 transitions, 1557 flow [2021-06-10 14:33:00,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 425.6666666666667) internal successors, (1277), 3 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:00,756 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:00,756 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:00,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2021-06-10 14:33:00,756 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:00,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:00,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1556402445, now seen corresponding path program 1 times [2021-06-10 14:33:00,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:00,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564823250] [2021-06-10 14:33:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:00,802 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:00,804 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:00,840 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:00,840 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:00,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281 [2021-06-10 14:33:00,840 WARN L342 ceAbstractionStarter]: 141 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:00,841 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 142 thread instances. [2021-06-10 14:33:00,945 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:00,945 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:00,945 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:00,945 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:00,945 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:00,945 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:00,945 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:00,945 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:00,945 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:00,945 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:00,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 716 places, 431 transitions, 21594 flow [2021-06-10 14:33:01,361 INFO L129 PetriNetUnfolder]: 0/857 cut-off events. [2021-06-10 14:33:01,361 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:01,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11437 conditions, 857 events. 0/857 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3469 event pairs, 0 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 0. Up to 143 conditions per place. [2021-06-10 14:33:01,361 INFO L82 GeneralOperation]: Start removeDead. Operand has 716 places, 431 transitions, 21594 flow [2021-06-10 14:33:01,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 714 places, 429 transitions, 21590 flow [2021-06-10 14:33:01,369 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:01,369 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:01,369 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:01,369 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:01,369 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:01,369 INFO L82 PathProgramCache]: Analyzing trace with hash 998467, now seen corresponding path program 1 times [2021-06-10 14:33:01,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:01,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981306827] [2021-06-10 14:33:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:01,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:01,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:01,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981306827] [2021-06-10 14:33:01,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:01,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:01,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101024197] [2021-06-10 14:33:01,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:01,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:01,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:01,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:01,418 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 428 out of 431 [2021-06-10 14:33:01,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 714 places, 429 transitions, 21590 flow. Second operand has 3 states, 3 states have (on average 428.6666666666667) internal successors, (1286), 3 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:01,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:01,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 428 of 431 [2021-06-10 14:33:01,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:01,745 INFO L129 PetriNetUnfolder]: 0/428 cut-off events. [2021-06-10 14:33:01,745 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:01,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11010 conditions, 428 events. 0/428 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 947 event pairs, 0 based on Foata normal form. 143/571 useless extension candidates. Maximal degree in co-relation 0. Up to 143 conditions per place. [2021-06-10 14:33:01,746 INFO L132 encePairwiseOnDemand]: 429/431 looper letters, 0 selfloop transitions, 1 changer transitions 0/428 dead transitions. [2021-06-10 14:33:01,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 428 transitions, 21590 flow [2021-06-10 14:33:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:01,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1286 transitions. [2021-06-10 14:33:01,747 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9945862335653519 [2021-06-10 14:33:01,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1286 transitions. [2021-06-10 14:33:01,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1286 transitions. [2021-06-10 14:33:01,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:01,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1286 transitions. [2021-06-10 14:33:01,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 428.6666666666667) internal successors, (1286), 3 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:01,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:01,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:01,748 INFO L185 Difference]: Start difference. First operand has 714 places, 429 transitions, 21590 flow. Second operand 3 states and 1286 transitions. [2021-06-10 14:33:01,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 428 transitions, 21590 flow [2021-06-10 14:33:02,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 715 places, 428 transitions, 1568 flow, removed 10011 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:02,624 INFO L241 Difference]: Finished difference. Result has 715 places, 428 transitions, 1568 flow [2021-06-10 14:33:02,625 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1568, PETRI_PLACES=715, PETRI_TRANSITIONS=428} [2021-06-10 14:33:02,625 INFO L343 CegarLoopForPetriNet]: 714 programPoint places, 1 predicate places. [2021-06-10 14:33:02,625 INFO L480 AbstractCegarLoop]: Abstraction has has 715 places, 428 transitions, 1568 flow [2021-06-10 14:33:02,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 428.6666666666667) internal successors, (1286), 3 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:02,625 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:02,625 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:02,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282 [2021-06-10 14:33:02,625 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:02,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1613715517, now seen corresponding path program 1 times [2021-06-10 14:33:02,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:02,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893994639] [2021-06-10 14:33:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:02,672 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:02,674 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:02,712 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:02,713 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:02,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283 [2021-06-10 14:33:02,713 WARN L342 ceAbstractionStarter]: 142 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:02,713 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 143 thread instances. [2021-06-10 14:33:02,828 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:02,829 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:02,829 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:02,829 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:02,829 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:02,829 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:02,829 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:02,829 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:02,829 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:02,829 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:02,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 721 places, 434 transitions, 21889 flow [2021-06-10 14:33:03,255 INFO L129 PetriNetUnfolder]: 0/863 cut-off events. [2021-06-10 14:33:03,255 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:03,255 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11589 conditions, 863 events. 0/863 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3364 event pairs, 0 based on Foata normal form. 0/719 useless extension candidates. Maximal degree in co-relation 0. Up to 144 conditions per place. [2021-06-10 14:33:03,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 721 places, 434 transitions, 21889 flow [2021-06-10 14:33:03,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 719 places, 432 transitions, 21885 flow [2021-06-10 14:33:03,263 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:03,263 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:03,263 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:03,263 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:03,263 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:03,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:03,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1012355, now seen corresponding path program 1 times [2021-06-10 14:33:03,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:03,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120582281] [2021-06-10 14:33:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:03,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:03,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:03,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120582281] [2021-06-10 14:33:03,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:03,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:03,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067255203] [2021-06-10 14:33:03,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:03,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:03,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:03,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:03,313 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 431 out of 434 [2021-06-10 14:33:03,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 432 transitions, 21885 flow. Second operand has 3 states, 3 states have (on average 431.6666666666667) internal successors, (1295), 3 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:03,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:03,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 431 of 434 [2021-06-10 14:33:03,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:03,745 INFO L129 PetriNetUnfolder]: 0/431 cut-off events. [2021-06-10 14:33:03,745 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:03,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11159 conditions, 431 events. 0/431 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 865 event pairs, 0 based on Foata normal form. 144/575 useless extension candidates. Maximal degree in co-relation 0. Up to 144 conditions per place. [2021-06-10 14:33:03,746 INFO L132 encePairwiseOnDemand]: 432/434 looper letters, 0 selfloop transitions, 1 changer transitions 0/431 dead transitions. [2021-06-10 14:33:03,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 431 transitions, 21885 flow [2021-06-10 14:33:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1295 transitions. [2021-06-10 14:33:03,747 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9946236559139785 [2021-06-10 14:33:03,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1295 transitions. [2021-06-10 14:33:03,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1295 transitions. [2021-06-10 14:33:03,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:03,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1295 transitions. [2021-06-10 14:33:03,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 431.6666666666667) internal successors, (1295), 3 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:03,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:03,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:03,748 INFO L185 Difference]: Start difference. First operand has 719 places, 432 transitions, 21885 flow. Second operand 3 states and 1295 transitions. [2021-06-10 14:33:03,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 431 transitions, 21885 flow [2021-06-10 14:33:04,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 431 transitions, 1579 flow, removed 10153 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:04,640 INFO L241 Difference]: Finished difference. Result has 720 places, 431 transitions, 1579 flow [2021-06-10 14:33:04,640 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=718, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1579, PETRI_PLACES=720, PETRI_TRANSITIONS=431} [2021-06-10 14:33:04,640 INFO L343 CegarLoopForPetriNet]: 719 programPoint places, 1 predicate places. [2021-06-10 14:33:04,640 INFO L480 AbstractCegarLoop]: Abstraction has has 720 places, 431 transitions, 1579 flow [2021-06-10 14:33:04,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 431.6666666666667) internal successors, (1295), 3 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:04,640 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:04,640 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:04,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284 [2021-06-10 14:33:04,641 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:04,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:04,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1862749517, now seen corresponding path program 1 times [2021-06-10 14:33:04,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:04,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756801927] [2021-06-10 14:33:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:04,690 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:04,692 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:04,730 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:04,730 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:04,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285 [2021-06-10 14:33:04,730 WARN L342 ceAbstractionStarter]: 143 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:04,730 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 144 thread instances. [2021-06-10 14:33:04,826 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:04,826 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:04,826 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:04,826 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:04,826 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:04,826 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:04,826 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:04,826 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:04,826 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:04,826 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:04,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 726 places, 437 transitions, 22186 flow [2021-06-10 14:33:05,260 INFO L129 PetriNetUnfolder]: 0/869 cut-off events. [2021-06-10 14:33:05,260 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:05,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11742 conditions, 869 events. 0/869 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3388 event pairs, 0 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 0. Up to 145 conditions per place. [2021-06-10 14:33:05,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 726 places, 437 transitions, 22186 flow [2021-06-10 14:33:05,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 724 places, 435 transitions, 22182 flow [2021-06-10 14:33:05,268 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:05,268 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:05,268 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:05,268 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:05,268 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:05,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1026339, now seen corresponding path program 1 times [2021-06-10 14:33:05,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:05,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510416436] [2021-06-10 14:33:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:05,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:05,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:05,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510416436] [2021-06-10 14:33:05,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:05,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:05,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214974685] [2021-06-10 14:33:05,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:05,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:05,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:05,323 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 434 out of 437 [2021-06-10 14:33:05,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 435 transitions, 22182 flow. Second operand has 3 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:05,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:05,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 434 of 437 [2021-06-10 14:33:05,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:05,664 INFO L129 PetriNetUnfolder]: 0/434 cut-off events. [2021-06-10 14:33:05,665 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:05,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11309 conditions, 434 events. 0/434 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 887 event pairs, 0 based on Foata normal form. 145/579 useless extension candidates. Maximal degree in co-relation 0. Up to 145 conditions per place. [2021-06-10 14:33:05,666 INFO L132 encePairwiseOnDemand]: 435/437 looper letters, 0 selfloop transitions, 1 changer transitions 0/434 dead transitions. [2021-06-10 14:33:05,666 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 725 places, 434 transitions, 22182 flow [2021-06-10 14:33:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1304 transitions. [2021-06-10 14:33:05,666 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9946605644546148 [2021-06-10 14:33:05,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1304 transitions. [2021-06-10 14:33:05,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1304 transitions. [2021-06-10 14:33:05,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:05,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1304 transitions. [2021-06-10 14:33:05,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:05,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:05,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:05,668 INFO L185 Difference]: Start difference. First operand has 724 places, 435 transitions, 22182 flow. Second operand 3 states and 1304 transitions. [2021-06-10 14:33:05,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 725 places, 434 transitions, 22182 flow [2021-06-10 14:33:06,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 434 transitions, 1590 flow, removed 10296 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:06,555 INFO L241 Difference]: Finished difference. Result has 725 places, 434 transitions, 1590 flow [2021-06-10 14:33:06,555 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1590, PETRI_PLACES=725, PETRI_TRANSITIONS=434} [2021-06-10 14:33:06,555 INFO L343 CegarLoopForPetriNet]: 724 programPoint places, 1 predicate places. [2021-06-10 14:33:06,555 INFO L480 AbstractCegarLoop]: Abstraction has has 725 places, 434 transitions, 1590 flow [2021-06-10 14:33:06,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:06,555 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:06,555 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:06,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286 [2021-06-10 14:33:06,555 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:06,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1105081344, now seen corresponding path program 1 times [2021-06-10 14:33:06,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:06,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075649727] [2021-06-10 14:33:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:06,603 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:06,605 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:06,644 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:06,644 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:06,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287 [2021-06-10 14:33:06,645 WARN L342 ceAbstractionStarter]: 144 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:06,645 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 145 thread instances. [2021-06-10 14:33:06,752 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:06,752 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:06,752 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:06,752 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:06,752 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:06,753 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:06,753 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:06,753 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:06,753 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:06,753 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:06,757 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 731 places, 440 transitions, 22485 flow [2021-06-10 14:33:07,194 INFO L129 PetriNetUnfolder]: 0/875 cut-off events. [2021-06-10 14:33:07,194 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:07,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11896 conditions, 875 events. 0/875 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3425 event pairs, 0 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 0. Up to 146 conditions per place. [2021-06-10 14:33:07,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 731 places, 440 transitions, 22485 flow [2021-06-10 14:33:07,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 729 places, 438 transitions, 22481 flow [2021-06-10 14:33:07,202 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:07,202 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:07,202 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:07,202 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:07,203 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:07,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:07,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1040419, now seen corresponding path program 1 times [2021-06-10 14:33:07,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:07,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763878537] [2021-06-10 14:33:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:07,250 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:07,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:07,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763878537] [2021-06-10 14:33:07,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:07,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:07,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971429673] [2021-06-10 14:33:07,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:07,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:07,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:07,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:07,255 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 437 out of 440 [2021-06-10 14:33:07,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 438 transitions, 22481 flow. Second operand has 3 states, 3 states have (on average 437.6666666666667) internal successors, (1313), 3 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:07,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:07,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 437 of 440 [2021-06-10 14:33:07,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:07,613 INFO L129 PetriNetUnfolder]: 0/437 cut-off events. [2021-06-10 14:33:07,613 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:07,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11460 conditions, 437 events. 0/437 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 895 event pairs, 0 based on Foata normal form. 146/583 useless extension candidates. Maximal degree in co-relation 0. Up to 146 conditions per place. [2021-06-10 14:33:07,614 INFO L132 encePairwiseOnDemand]: 438/440 looper letters, 0 selfloop transitions, 1 changer transitions 0/437 dead transitions. [2021-06-10 14:33:07,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 437 transitions, 22481 flow [2021-06-10 14:33:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1313 transitions. [2021-06-10 14:33:07,615 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9946969696969697 [2021-06-10 14:33:07,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1313 transitions. [2021-06-10 14:33:07,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1313 transitions. [2021-06-10 14:33:07,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:07,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1313 transitions. [2021-06-10 14:33:07,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 437.6666666666667) internal successors, (1313), 3 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:07,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:07,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:07,617 INFO L185 Difference]: Start difference. First operand has 729 places, 438 transitions, 22481 flow. Second operand 3 states and 1313 transitions. [2021-06-10 14:33:07,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 437 transitions, 22481 flow [2021-06-10 14:33:08,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 437 transitions, 1601 flow, removed 10440 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:08,494 INFO L241 Difference]: Finished difference. Result has 730 places, 437 transitions, 1601 flow [2021-06-10 14:33:08,494 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1601, PETRI_PLACES=730, PETRI_TRANSITIONS=437} [2021-06-10 14:33:08,494 INFO L343 CegarLoopForPetriNet]: 729 programPoint places, 1 predicate places. [2021-06-10 14:33:08,494 INFO L480 AbstractCegarLoop]: Abstraction has has 730 places, 437 transitions, 1601 flow [2021-06-10 14:33:08,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 437.6666666666667) internal successors, (1313), 3 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:08,494 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:08,494 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:08,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288 [2021-06-10 14:33:08,494 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:08,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:08,494 INFO L82 PathProgramCache]: Analyzing trace with hash -628799271, now seen corresponding path program 1 times [2021-06-10 14:33:08,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:08,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702110398] [2021-06-10 14:33:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:08,542 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:08,544 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:08,582 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:08,583 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:08,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289 [2021-06-10 14:33:08,583 WARN L342 ceAbstractionStarter]: 145 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:08,583 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 146 thread instances. [2021-06-10 14:33:08,687 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:08,688 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:08,688 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:08,688 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:08,688 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:08,688 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:08,688 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:08,688 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:08,688 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:08,688 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:08,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 736 places, 443 transitions, 22786 flow [2021-06-10 14:33:09,155 INFO L129 PetriNetUnfolder]: 0/881 cut-off events. [2021-06-10 14:33:09,155 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:09,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12051 conditions, 881 events. 0/881 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3499 event pairs, 0 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 0. Up to 147 conditions per place. [2021-06-10 14:33:09,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 736 places, 443 transitions, 22786 flow [2021-06-10 14:33:09,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 734 places, 441 transitions, 22782 flow [2021-06-10 14:33:09,163 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:09,163 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:09,163 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:09,163 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:09,163 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:09,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1054595, now seen corresponding path program 1 times [2021-06-10 14:33:09,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:09,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351509776] [2021-06-10 14:33:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:09,211 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:09,211 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:09,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351509776] [2021-06-10 14:33:09,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:09,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:09,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178853227] [2021-06-10 14:33:09,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:09,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:09,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:09,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:09,214 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 440 out of 443 [2021-06-10 14:33:09,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 441 transitions, 22782 flow. Second operand has 3 states, 3 states have (on average 440.6666666666667) internal successors, (1322), 3 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:09,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:09,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 440 of 443 [2021-06-10 14:33:09,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:09,561 INFO L129 PetriNetUnfolder]: 0/440 cut-off events. [2021-06-10 14:33:09,561 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:09,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11612 conditions, 440 events. 0/440 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 928 event pairs, 0 based on Foata normal form. 147/587 useless extension candidates. Maximal degree in co-relation 0. Up to 147 conditions per place. [2021-06-10 14:33:09,562 INFO L132 encePairwiseOnDemand]: 441/443 looper letters, 0 selfloop transitions, 1 changer transitions 0/440 dead transitions. [2021-06-10 14:33:09,562 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 440 transitions, 22782 flow [2021-06-10 14:33:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1322 transitions. [2021-06-10 14:33:09,563 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9947328818660647 [2021-06-10 14:33:09,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1322 transitions. [2021-06-10 14:33:09,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1322 transitions. [2021-06-10 14:33:09,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:09,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1322 transitions. [2021-06-10 14:33:09,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 440.6666666666667) internal successors, (1322), 3 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:09,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:09,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:09,565 INFO L185 Difference]: Start difference. First operand has 734 places, 441 transitions, 22782 flow. Second operand 3 states and 1322 transitions. [2021-06-10 14:33:09,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 440 transitions, 22782 flow [2021-06-10 14:33:10,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 440 transitions, 1612 flow, removed 10585 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:10,427 INFO L241 Difference]: Finished difference. Result has 735 places, 440 transitions, 1612 flow [2021-06-10 14:33:10,427 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=733, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1612, PETRI_PLACES=735, PETRI_TRANSITIONS=440} [2021-06-10 14:33:10,427 INFO L343 CegarLoopForPetriNet]: 734 programPoint places, 1 predicate places. [2021-06-10 14:33:10,427 INFO L480 AbstractCegarLoop]: Abstraction has has 735 places, 440 transitions, 1612 flow [2021-06-10 14:33:10,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 440.6666666666667) internal successors, (1322), 3 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:10,427 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:10,427 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:10,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2021-06-10 14:33:10,427 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:10,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:10,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1333894269, now seen corresponding path program 1 times [2021-06-10 14:33:10,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:10,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704595347] [2021-06-10 14:33:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:10,476 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:10,478 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:10,517 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:10,517 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:10,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291 [2021-06-10 14:33:10,517 WARN L342 ceAbstractionStarter]: 146 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:10,517 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 147 thread instances. [2021-06-10 14:33:10,624 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:10,624 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:10,624 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:10,624 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:10,624 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:10,624 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:10,624 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:10,624 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:10,624 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:10,624 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:10,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 741 places, 446 transitions, 23089 flow [2021-06-10 14:33:11,077 INFO L129 PetriNetUnfolder]: 0/887 cut-off events. [2021-06-10 14:33:11,077 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:11,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12207 conditions, 887 events. 0/887 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3498 event pairs, 0 based on Foata normal form. 0/739 useless extension candidates. Maximal degree in co-relation 0. Up to 148 conditions per place. [2021-06-10 14:33:11,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 741 places, 446 transitions, 23089 flow [2021-06-10 14:33:11,085 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 739 places, 444 transitions, 23085 flow [2021-06-10 14:33:11,085 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:11,085 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:11,085 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:11,085 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:11,085 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:11,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:11,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1068867, now seen corresponding path program 1 times [2021-06-10 14:33:11,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:11,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130491886] [2021-06-10 14:33:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:11,133 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:11,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:11,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130491886] [2021-06-10 14:33:11,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:11,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:11,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754423549] [2021-06-10 14:33:11,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:11,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:11,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:11,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:11,137 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 443 out of 446 [2021-06-10 14:33:11,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 444 transitions, 23085 flow. Second operand has 3 states, 3 states have (on average 443.6666666666667) internal successors, (1331), 3 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:11,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:11,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 443 of 446 [2021-06-10 14:33:11,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:11,494 INFO L129 PetriNetUnfolder]: 0/443 cut-off events. [2021-06-10 14:33:11,495 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:11,495 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11765 conditions, 443 events. 0/443 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 890 event pairs, 0 based on Foata normal form. 148/591 useless extension candidates. Maximal degree in co-relation 0. Up to 148 conditions per place. [2021-06-10 14:33:11,496 INFO L132 encePairwiseOnDemand]: 444/446 looper letters, 0 selfloop transitions, 1 changer transitions 0/443 dead transitions. [2021-06-10 14:33:11,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 443 transitions, 23085 flow [2021-06-10 14:33:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1331 transitions. [2021-06-10 14:33:11,496 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9947683109118086 [2021-06-10 14:33:11,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1331 transitions. [2021-06-10 14:33:11,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1331 transitions. [2021-06-10 14:33:11,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:11,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1331 transitions. [2021-06-10 14:33:11,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 443.6666666666667) internal successors, (1331), 3 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:11,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:11,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:11,498 INFO L185 Difference]: Start difference. First operand has 739 places, 444 transitions, 23085 flow. Second operand 3 states and 1331 transitions. [2021-06-10 14:33:11,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 443 transitions, 23085 flow [2021-06-10 14:33:12,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 443 transitions, 1623 flow, removed 10731 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:12,351 INFO L241 Difference]: Finished difference. Result has 740 places, 443 transitions, 1623 flow [2021-06-10 14:33:12,351 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=738, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1623, PETRI_PLACES=740, PETRI_TRANSITIONS=443} [2021-06-10 14:33:12,351 INFO L343 CegarLoopForPetriNet]: 739 programPoint places, 1 predicate places. [2021-06-10 14:33:12,351 INFO L480 AbstractCegarLoop]: Abstraction has has 740 places, 443 transitions, 1623 flow [2021-06-10 14:33:12,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 443.6666666666667) internal successors, (1331), 3 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:12,351 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:12,352 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:12,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292 [2021-06-10 14:33:12,352 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:12,352 INFO L82 PathProgramCache]: Analyzing trace with hash 333096753, now seen corresponding path program 1 times [2021-06-10 14:33:12,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:12,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523868644] [2021-06-10 14:33:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:12,401 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:12,403 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:12,443 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:12,443 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:12,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293 [2021-06-10 14:33:12,444 WARN L342 ceAbstractionStarter]: 147 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:12,444 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 148 thread instances. [2021-06-10 14:33:12,551 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:12,552 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:12,552 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:12,552 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:12,552 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:12,552 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:12,552 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:12,552 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:12,552 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:12,552 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:12,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 746 places, 449 transitions, 23394 flow [2021-06-10 14:33:13,017 INFO L129 PetriNetUnfolder]: 0/893 cut-off events. [2021-06-10 14:33:13,018 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:13,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12364 conditions, 893 events. 0/893 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3312 event pairs, 0 based on Foata normal form. 0/744 useless extension candidates. Maximal degree in co-relation 0. Up to 149 conditions per place. [2021-06-10 14:33:13,018 INFO L82 GeneralOperation]: Start removeDead. Operand has 746 places, 449 transitions, 23394 flow [2021-06-10 14:33:13,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 744 places, 447 transitions, 23390 flow [2021-06-10 14:33:13,026 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:13,026 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:13,026 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:13,026 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:13,026 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:13,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:13,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1083235, now seen corresponding path program 1 times [2021-06-10 14:33:13,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:13,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520951165] [2021-06-10 14:33:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:13,075 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:13,075 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:13,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520951165] [2021-06-10 14:33:13,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:13,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:13,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771543901] [2021-06-10 14:33:13,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:13,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:13,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:13,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:13,078 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 446 out of 449 [2021-06-10 14:33:13,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 447 transitions, 23390 flow. Second operand has 3 states, 3 states have (on average 446.6666666666667) internal successors, (1340), 3 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:13,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:13,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 446 of 449 [2021-06-10 14:33:13,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:13,484 INFO L129 PetriNetUnfolder]: 0/446 cut-off events. [2021-06-10 14:33:13,484 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:13,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11919 conditions, 446 events. 0/446 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 825 event pairs, 0 based on Foata normal form. 149/595 useless extension candidates. Maximal degree in co-relation 0. Up to 149 conditions per place. [2021-06-10 14:33:13,485 INFO L132 encePairwiseOnDemand]: 447/449 looper letters, 0 selfloop transitions, 1 changer transitions 0/446 dead transitions. [2021-06-10 14:33:13,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 446 transitions, 23390 flow [2021-06-10 14:33:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1340 transitions. [2021-06-10 14:33:13,486 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9948032665181886 [2021-06-10 14:33:13,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1340 transitions. [2021-06-10 14:33:13,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1340 transitions. [2021-06-10 14:33:13,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:13,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1340 transitions. [2021-06-10 14:33:13,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 446.6666666666667) internal successors, (1340), 3 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:13,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:13,487 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:13,487 INFO L185 Difference]: Start difference. First operand has 744 places, 447 transitions, 23390 flow. Second operand 3 states and 1340 transitions. [2021-06-10 14:33:13,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 446 transitions, 23390 flow [2021-06-10 14:33:14,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 745 places, 446 transitions, 1634 flow, removed 10878 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:14,379 INFO L241 Difference]: Finished difference. Result has 745 places, 446 transitions, 1634 flow [2021-06-10 14:33:14,379 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=449, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1634, PETRI_PLACES=745, PETRI_TRANSITIONS=446} [2021-06-10 14:33:14,379 INFO L343 CegarLoopForPetriNet]: 744 programPoint places, 1 predicate places. [2021-06-10 14:33:14,380 INFO L480 AbstractCegarLoop]: Abstraction has has 745 places, 446 transitions, 1634 flow [2021-06-10 14:33:14,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 446.6666666666667) internal successors, (1340), 3 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:14,380 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:14,380 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:14,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294 [2021-06-10 14:33:14,380 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash 361503558, now seen corresponding path program 1 times [2021-06-10 14:33:14,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:14,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991836609] [2021-06-10 14:33:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:14,430 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:14,433 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:14,473 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:14,474 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:14,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295 [2021-06-10 14:33:14,474 WARN L342 ceAbstractionStarter]: 148 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:14,474 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 149 thread instances. [2021-06-10 14:33:14,587 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:14,587 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:14,588 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:14,588 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:14,588 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:14,588 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:14,588 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:14,588 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:14,588 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:14,588 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:14,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 751 places, 452 transitions, 23701 flow [2021-06-10 14:33:15,065 INFO L129 PetriNetUnfolder]: 0/899 cut-off events. [2021-06-10 14:33:15,065 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:15,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12522 conditions, 899 events. 0/899 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3437 event pairs, 0 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 0. Up to 150 conditions per place. [2021-06-10 14:33:15,065 INFO L82 GeneralOperation]: Start removeDead. Operand has 751 places, 452 transitions, 23701 flow [2021-06-10 14:33:15,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 749 places, 450 transitions, 23697 flow [2021-06-10 14:33:15,073 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:15,073 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:15,073 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:15,073 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:15,073 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:15,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:15,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1097699, now seen corresponding path program 1 times [2021-06-10 14:33:15,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:15,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753592119] [2021-06-10 14:33:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:15,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:15,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:15,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753592119] [2021-06-10 14:33:15,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:15,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:15,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556217032] [2021-06-10 14:33:15,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:15,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:15,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:15,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:15,128 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 449 out of 452 [2021-06-10 14:33:15,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 450 transitions, 23697 flow. Second operand has 3 states, 3 states have (on average 449.6666666666667) internal successors, (1349), 3 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:15,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:15,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 449 of 452 [2021-06-10 14:33:15,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:15,499 INFO L129 PetriNetUnfolder]: 0/449 cut-off events. [2021-06-10 14:33:15,500 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:15,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12074 conditions, 449 events. 0/449 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 854 event pairs, 0 based on Foata normal form. 150/599 useless extension candidates. Maximal degree in co-relation 0. Up to 150 conditions per place. [2021-06-10 14:33:15,501 INFO L132 encePairwiseOnDemand]: 450/452 looper letters, 0 selfloop transitions, 1 changer transitions 0/449 dead transitions. [2021-06-10 14:33:15,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 449 transitions, 23697 flow [2021-06-10 14:33:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:15,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1349 transitions. [2021-06-10 14:33:15,502 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9948377581120944 [2021-06-10 14:33:15,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1349 transitions. [2021-06-10 14:33:15,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1349 transitions. [2021-06-10 14:33:15,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:15,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1349 transitions. [2021-06-10 14:33:15,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 449.6666666666667) internal successors, (1349), 3 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:15,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:15,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:15,503 INFO L185 Difference]: Start difference. First operand has 749 places, 450 transitions, 23697 flow. Second operand 3 states and 1349 transitions. [2021-06-10 14:33:15,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 449 transitions, 23697 flow [2021-06-10 14:33:16,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 750 places, 449 transitions, 1645 flow, removed 11026 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:16,414 INFO L241 Difference]: Finished difference. Result has 750 places, 449 transitions, 1645 flow [2021-06-10 14:33:16,414 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=748, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1645, PETRI_PLACES=750, PETRI_TRANSITIONS=449} [2021-06-10 14:33:16,414 INFO L343 CegarLoopForPetriNet]: 749 programPoint places, 1 predicate places. [2021-06-10 14:33:16,414 INFO L480 AbstractCegarLoop]: Abstraction has has 750 places, 449 transitions, 1645 flow [2021-06-10 14:33:16,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 449.6666666666667) internal successors, (1349), 3 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:16,414 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:16,414 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:16,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296 [2021-06-10 14:33:16,414 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:16,414 INFO L82 PathProgramCache]: Analyzing trace with hash 42044373, now seen corresponding path program 1 times [2021-06-10 14:33:16,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:16,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236339939] [2021-06-10 14:33:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:16,467 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:16,469 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:16,511 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:16,511 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:16,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2021-06-10 14:33:16,511 WARN L342 ceAbstractionStarter]: 149 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:16,511 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 150 thread instances. [2021-06-10 14:33:16,621 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:16,621 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:16,622 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:16,622 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:16,622 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:16,622 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:16,622 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:16,622 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:16,622 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:16,622 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:16,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 756 places, 455 transitions, 24010 flow [2021-06-10 14:33:17,107 INFO L129 PetriNetUnfolder]: 0/905 cut-off events. [2021-06-10 14:33:17,107 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:17,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12681 conditions, 905 events. 0/905 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3553 event pairs, 0 based on Foata normal form. 0/754 useless extension candidates. Maximal degree in co-relation 0. Up to 151 conditions per place. [2021-06-10 14:33:17,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 756 places, 455 transitions, 24010 flow [2021-06-10 14:33:17,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 754 places, 453 transitions, 24006 flow [2021-06-10 14:33:17,115 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:17,115 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:17,115 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:17,116 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:17,116 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:17,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1112259, now seen corresponding path program 1 times [2021-06-10 14:33:17,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:17,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997622182] [2021-06-10 14:33:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:17,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:17,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:17,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997622182] [2021-06-10 14:33:17,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:17,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:17,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943811110] [2021-06-10 14:33:17,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:17,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:17,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:17,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:17,170 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 452 out of 455 [2021-06-10 14:33:17,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 453 transitions, 24006 flow. Second operand has 3 states, 3 states have (on average 452.6666666666667) internal successors, (1358), 3 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:17,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:17,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 452 of 455 [2021-06-10 14:33:17,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:17,548 INFO L129 PetriNetUnfolder]: 0/452 cut-off events. [2021-06-10 14:33:17,548 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:17,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12230 conditions, 452 events. 0/452 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 848 event pairs, 0 based on Foata normal form. 151/603 useless extension candidates. Maximal degree in co-relation 0. Up to 151 conditions per place. [2021-06-10 14:33:17,550 INFO L132 encePairwiseOnDemand]: 453/455 looper letters, 0 selfloop transitions, 1 changer transitions 0/452 dead transitions. [2021-06-10 14:33:17,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 452 transitions, 24006 flow [2021-06-10 14:33:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1358 transitions. [2021-06-10 14:33:17,550 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9948717948717949 [2021-06-10 14:33:17,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1358 transitions. [2021-06-10 14:33:17,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1358 transitions. [2021-06-10 14:33:17,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:17,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1358 transitions. [2021-06-10 14:33:17,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 452.6666666666667) internal successors, (1358), 3 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:17,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:17,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:17,552 INFO L185 Difference]: Start difference. First operand has 754 places, 453 transitions, 24006 flow. Second operand 3 states and 1358 transitions. [2021-06-10 14:33:17,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 452 transitions, 24006 flow [2021-06-10 14:33:18,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 755 places, 452 transitions, 1656 flow, removed 11175 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:18,605 INFO L241 Difference]: Finished difference. Result has 755 places, 452 transitions, 1656 flow [2021-06-10 14:33:18,605 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=753, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1656, PETRI_PLACES=755, PETRI_TRANSITIONS=452} [2021-06-10 14:33:18,605 INFO L343 CegarLoopForPetriNet]: 754 programPoint places, 1 predicate places. [2021-06-10 14:33:18,605 INFO L480 AbstractCegarLoop]: Abstraction has has 755 places, 452 transitions, 1656 flow [2021-06-10 14:33:18,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 452.6666666666667) internal successors, (1358), 3 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:18,605 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:18,605 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:18,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2021-06-10 14:33:18,605 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:18,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1272205367, now seen corresponding path program 1 times [2021-06-10 14:33:18,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:18,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788421910] [2021-06-10 14:33:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:18,656 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:18,658 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:18,699 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:18,700 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:18,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299 [2021-06-10 14:33:18,700 WARN L342 ceAbstractionStarter]: 150 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:18,700 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 151 thread instances. [2021-06-10 14:33:18,808 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:18,808 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:18,809 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:18,809 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:18,809 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:18,809 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:18,809 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:18,809 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:18,809 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:18,809 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:18,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 761 places, 458 transitions, 24321 flow [2021-06-10 14:33:19,297 INFO L129 PetriNetUnfolder]: 0/911 cut-off events. [2021-06-10 14:33:19,297 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:19,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12841 conditions, 911 events. 0/911 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3575 event pairs, 0 based on Foata normal form. 0/759 useless extension candidates. Maximal degree in co-relation 0. Up to 152 conditions per place. [2021-06-10 14:33:19,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 761 places, 458 transitions, 24321 flow [2021-06-10 14:33:19,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 759 places, 456 transitions, 24317 flow [2021-06-10 14:33:19,306 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:19,306 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:19,306 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:19,306 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:19,306 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:19,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:19,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1126915, now seen corresponding path program 1 times [2021-06-10 14:33:19,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:19,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113589025] [2021-06-10 14:33:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:19,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:19,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:19,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113589025] [2021-06-10 14:33:19,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:19,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:19,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568720075] [2021-06-10 14:33:19,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:19,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:19,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:19,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:19,360 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 455 out of 458 [2021-06-10 14:33:19,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 456 transitions, 24317 flow. Second operand has 3 states, 3 states have (on average 455.6666666666667) internal successors, (1367), 3 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:19,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:19,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 455 of 458 [2021-06-10 14:33:19,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:19,745 INFO L129 PetriNetUnfolder]: 0/455 cut-off events. [2021-06-10 14:33:19,745 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:19,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12387 conditions, 455 events. 0/455 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 896 event pairs, 0 based on Foata normal form. 152/607 useless extension candidates. Maximal degree in co-relation 0. Up to 152 conditions per place. [2021-06-10 14:33:19,746 INFO L132 encePairwiseOnDemand]: 456/458 looper letters, 0 selfloop transitions, 1 changer transitions 0/455 dead transitions. [2021-06-10 14:33:19,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 760 places, 455 transitions, 24317 flow [2021-06-10 14:33:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:19,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1367 transitions. [2021-06-10 14:33:19,747 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.99490538573508 [2021-06-10 14:33:19,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1367 transitions. [2021-06-10 14:33:19,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1367 transitions. [2021-06-10 14:33:19,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:19,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1367 transitions. [2021-06-10 14:33:19,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 455.6666666666667) internal successors, (1367), 3 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:19,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:19,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:19,749 INFO L185 Difference]: Start difference. First operand has 759 places, 456 transitions, 24317 flow. Second operand 3 states and 1367 transitions. [2021-06-10 14:33:19,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 760 places, 455 transitions, 24317 flow [2021-06-10 14:33:20,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 760 places, 455 transitions, 1667 flow, removed 11325 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:20,672 INFO L241 Difference]: Finished difference. Result has 760 places, 455 transitions, 1667 flow [2021-06-10 14:33:20,673 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=758, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1667, PETRI_PLACES=760, PETRI_TRANSITIONS=455} [2021-06-10 14:33:20,673 INFO L343 CegarLoopForPetriNet]: 759 programPoint places, 1 predicate places. [2021-06-10 14:33:20,673 INFO L480 AbstractCegarLoop]: Abstraction has has 760 places, 455 transitions, 1667 flow [2021-06-10 14:33:20,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 455.6666666666667) internal successors, (1367), 3 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:20,673 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:20,673 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:20,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300 [2021-06-10 14:33:20,673 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:20,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1201513915, now seen corresponding path program 1 times [2021-06-10 14:33:20,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:20,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783523267] [2021-06-10 14:33:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:20,724 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:20,727 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:20,768 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:20,768 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:20,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301 [2021-06-10 14:33:20,769 WARN L342 ceAbstractionStarter]: 151 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:20,769 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 152 thread instances. [2021-06-10 14:33:20,877 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:20,878 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:20,878 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:20,878 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:20,878 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:20,878 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:20,878 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:20,878 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:20,878 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:20,878 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:20,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 766 places, 461 transitions, 24634 flow [2021-06-10 14:33:21,375 INFO L129 PetriNetUnfolder]: 0/917 cut-off events. [2021-06-10 14:33:21,376 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:21,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13002 conditions, 917 events. 0/917 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3564 event pairs, 0 based on Foata normal form. 0/764 useless extension candidates. Maximal degree in co-relation 0. Up to 153 conditions per place. [2021-06-10 14:33:21,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 766 places, 461 transitions, 24634 flow [2021-06-10 14:33:21,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 764 places, 459 transitions, 24630 flow [2021-06-10 14:33:21,384 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:21,384 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:21,384 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:21,384 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:21,384 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:21,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:21,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1141667, now seen corresponding path program 1 times [2021-06-10 14:33:21,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:21,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533953085] [2021-06-10 14:33:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:21,438 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:21,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:21,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533953085] [2021-06-10 14:33:21,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:21,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:21,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716227350] [2021-06-10 14:33:21,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:21,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:21,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:21,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:21,441 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 458 out of 461 [2021-06-10 14:33:21,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 459 transitions, 24630 flow. Second operand has 3 states, 3 states have (on average 458.6666666666667) internal successors, (1376), 3 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:21,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:21,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 458 of 461 [2021-06-10 14:33:21,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:21,840 INFO L129 PetriNetUnfolder]: 0/458 cut-off events. [2021-06-10 14:33:21,840 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:21,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12545 conditions, 458 events. 0/458 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 869 event pairs, 0 based on Foata normal form. 153/611 useless extension candidates. Maximal degree in co-relation 0. Up to 153 conditions per place. [2021-06-10 14:33:21,842 INFO L132 encePairwiseOnDemand]: 459/461 looper letters, 0 selfloop transitions, 1 changer transitions 0/458 dead transitions. [2021-06-10 14:33:21,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 458 transitions, 24630 flow [2021-06-10 14:33:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1376 transitions. [2021-06-10 14:33:21,842 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9949385394070861 [2021-06-10 14:33:21,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1376 transitions. [2021-06-10 14:33:21,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1376 transitions. [2021-06-10 14:33:21,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:21,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1376 transitions. [2021-06-10 14:33:21,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 458.6666666666667) internal successors, (1376), 3 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:21,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 461.0) internal successors, (1844), 4 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:21,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 461.0) internal successors, (1844), 4 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:21,844 INFO L185 Difference]: Start difference. First operand has 764 places, 459 transitions, 24630 flow. Second operand 3 states and 1376 transitions. [2021-06-10 14:33:21,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 458 transitions, 24630 flow [2021-06-10 14:33:22,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 458 transitions, 1678 flow, removed 11476 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:22,815 INFO L241 Difference]: Finished difference. Result has 765 places, 458 transitions, 1678 flow [2021-06-10 14:33:22,816 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=461, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=763, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1678, PETRI_PLACES=765, PETRI_TRANSITIONS=458} [2021-06-10 14:33:22,816 INFO L343 CegarLoopForPetriNet]: 764 programPoint places, 1 predicate places. [2021-06-10 14:33:22,816 INFO L480 AbstractCegarLoop]: Abstraction has has 765 places, 458 transitions, 1678 flow [2021-06-10 14:33:22,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 458.6666666666667) internal successors, (1376), 3 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:22,816 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:22,816 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:22,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302 [2021-06-10 14:33:22,816 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1756914292, now seen corresponding path program 1 times [2021-06-10 14:33:22,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:22,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453409144] [2021-06-10 14:33:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:22,927 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:22,929 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:22,966 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:22,966 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:22,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2021-06-10 14:33:22,966 WARN L342 ceAbstractionStarter]: 152 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:22,966 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 153 thread instances. [2021-06-10 14:33:23,076 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:23,076 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:23,077 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:23,077 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:23,077 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:23,077 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:23,077 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:23,077 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:23,077 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:23,077 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:23,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 771 places, 464 transitions, 24949 flow [2021-06-10 14:33:23,585 INFO L129 PetriNetUnfolder]: 0/923 cut-off events. [2021-06-10 14:33:23,586 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:23,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13164 conditions, 923 events. 0/923 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3684 event pairs, 0 based on Foata normal form. 0/769 useless extension candidates. Maximal degree in co-relation 0. Up to 154 conditions per place. [2021-06-10 14:33:23,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 771 places, 464 transitions, 24949 flow [2021-06-10 14:33:23,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 769 places, 462 transitions, 24945 flow [2021-06-10 14:33:23,594 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:23,594 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:23,594 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:23,594 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:23,594 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:23,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1156515, now seen corresponding path program 1 times [2021-06-10 14:33:23,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:23,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978092041] [2021-06-10 14:33:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:23,647 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:23,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:23,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978092041] [2021-06-10 14:33:23,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:23,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:23,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989054155] [2021-06-10 14:33:23,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:23,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:23,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:23,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:23,651 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 461 out of 464 [2021-06-10 14:33:23,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 462 transitions, 24945 flow. Second operand has 3 states, 3 states have (on average 461.6666666666667) internal successors, (1385), 3 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:23,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:23,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 461 of 464 [2021-06-10 14:33:23,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:24,059 INFO L129 PetriNetUnfolder]: 0/461 cut-off events. [2021-06-10 14:33:24,059 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:24,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12704 conditions, 461 events. 0/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 881 event pairs, 0 based on Foata normal form. 154/615 useless extension candidates. Maximal degree in co-relation 0. Up to 154 conditions per place. [2021-06-10 14:33:24,060 INFO L132 encePairwiseOnDemand]: 462/464 looper letters, 0 selfloop transitions, 1 changer transitions 0/461 dead transitions. [2021-06-10 14:33:24,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 461 transitions, 24945 flow [2021-06-10 14:33:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:24,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1385 transitions. [2021-06-10 14:33:24,061 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9949712643678161 [2021-06-10 14:33:24,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1385 transitions. [2021-06-10 14:33:24,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1385 transitions. [2021-06-10 14:33:24,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:24,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1385 transitions. [2021-06-10 14:33:24,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 461.6666666666667) internal successors, (1385), 3 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:24,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:24,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:24,063 INFO L185 Difference]: Start difference. First operand has 769 places, 462 transitions, 24945 flow. Second operand 3 states and 1385 transitions. [2021-06-10 14:33:24,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 461 transitions, 24945 flow [2021-06-10 14:33:25,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 461 transitions, 1689 flow, removed 11628 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:25,031 INFO L241 Difference]: Finished difference. Result has 770 places, 461 transitions, 1689 flow [2021-06-10 14:33:25,031 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=768, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1689, PETRI_PLACES=770, PETRI_TRANSITIONS=461} [2021-06-10 14:33:25,032 INFO L343 CegarLoopForPetriNet]: 769 programPoint places, 1 predicate places. [2021-06-10 14:33:25,032 INFO L480 AbstractCegarLoop]: Abstraction has has 770 places, 461 transitions, 1689 flow [2021-06-10 14:33:25,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 461.6666666666667) internal successors, (1385), 3 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:25,032 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:25,032 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:25,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304 [2021-06-10 14:33:25,032 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:25,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:25,032 INFO L82 PathProgramCache]: Analyzing trace with hash 593737217, now seen corresponding path program 1 times [2021-06-10 14:33:25,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:25,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779566033] [2021-06-10 14:33:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:25,086 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:25,088 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:25,133 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:25,133 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:25,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305 [2021-06-10 14:33:25,133 WARN L342 ceAbstractionStarter]: 153 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:25,133 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 154 thread instances. [2021-06-10 14:33:25,246 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:25,246 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:25,247 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:25,247 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:25,247 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:25,247 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:25,247 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:25,247 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:25,247 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:25,247 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:25,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 776 places, 467 transitions, 25266 flow [2021-06-10 14:33:25,760 INFO L129 PetriNetUnfolder]: 0/929 cut-off events. [2021-06-10 14:33:25,761 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:25,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13327 conditions, 929 events. 0/929 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3645 event pairs, 0 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 0. Up to 155 conditions per place. [2021-06-10 14:33:25,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 776 places, 467 transitions, 25266 flow [2021-06-10 14:33:25,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 774 places, 465 transitions, 25262 flow [2021-06-10 14:33:25,769 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:25,769 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:25,769 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:25,769 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:25,769 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:25,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:25,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1171459, now seen corresponding path program 1 times [2021-06-10 14:33:25,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:25,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572154681] [2021-06-10 14:33:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:25,823 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:25,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:25,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572154681] [2021-06-10 14:33:25,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:25,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:25,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404731637] [2021-06-10 14:33:25,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:25,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:25,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:25,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:25,827 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 464 out of 467 [2021-06-10 14:33:25,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 774 places, 465 transitions, 25262 flow. Second operand has 3 states, 3 states have (on average 464.6666666666667) internal successors, (1394), 3 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:25,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:25,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 464 of 467 [2021-06-10 14:33:25,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:26,235 INFO L129 PetriNetUnfolder]: 0/464 cut-off events. [2021-06-10 14:33:26,235 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:26,236 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12864 conditions, 464 events. 0/464 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 155/619 useless extension candidates. Maximal degree in co-relation 0. Up to 155 conditions per place. [2021-06-10 14:33:26,237 INFO L132 encePairwiseOnDemand]: 465/467 looper letters, 0 selfloop transitions, 1 changer transitions 0/464 dead transitions. [2021-06-10 14:33:26,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 464 transitions, 25262 flow [2021-06-10 14:33:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1394 transitions. [2021-06-10 14:33:26,238 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9950035688793719 [2021-06-10 14:33:26,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1394 transitions. [2021-06-10 14:33:26,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1394 transitions. [2021-06-10 14:33:26,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:26,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1394 transitions. [2021-06-10 14:33:26,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 464.6666666666667) internal successors, (1394), 3 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:26,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 467.0) internal successors, (1868), 4 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:26,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 467.0) internal successors, (1868), 4 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:26,239 INFO L185 Difference]: Start difference. First operand has 774 places, 465 transitions, 25262 flow. Second operand 3 states and 1394 transitions. [2021-06-10 14:33:26,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 775 places, 464 transitions, 25262 flow [2021-06-10 14:33:27,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 464 transitions, 1700 flow, removed 11781 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:27,201 INFO L241 Difference]: Finished difference. Result has 775 places, 464 transitions, 1700 flow [2021-06-10 14:33:27,201 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=467, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1700, PETRI_PLACES=775, PETRI_TRANSITIONS=464} [2021-06-10 14:33:27,201 INFO L343 CegarLoopForPetriNet]: 774 programPoint places, 1 predicate places. [2021-06-10 14:33:27,201 INFO L480 AbstractCegarLoop]: Abstraction has has 775 places, 464 transitions, 1700 flow [2021-06-10 14:33:27,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 464.6666666666667) internal successors, (1394), 3 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:27,201 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:27,201 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:27,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306 [2021-06-10 14:33:27,201 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:27,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:27,202 INFO L82 PathProgramCache]: Analyzing trace with hash 792994063, now seen corresponding path program 1 times [2021-06-10 14:33:27,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:27,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822206151] [2021-06-10 14:33:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:27,261 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:27,264 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:27,309 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:27,310 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:27,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307 [2021-06-10 14:33:27,310 WARN L342 ceAbstractionStarter]: 154 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:27,310 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 155 thread instances. [2021-06-10 14:33:27,418 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:27,418 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:27,419 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:27,419 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:27,419 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:27,419 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:27,419 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:27,419 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:27,419 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:27,419 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:27,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 781 places, 470 transitions, 25585 flow [2021-06-10 14:33:27,965 INFO L129 PetriNetUnfolder]: 0/935 cut-off events. [2021-06-10 14:33:27,965 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:27,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13491 conditions, 935 events. 0/935 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3605 event pairs, 0 based on Foata normal form. 0/779 useless extension candidates. Maximal degree in co-relation 0. Up to 156 conditions per place. [2021-06-10 14:33:27,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 781 places, 470 transitions, 25585 flow [2021-06-10 14:33:27,973 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 779 places, 468 transitions, 25581 flow [2021-06-10 14:33:27,974 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:27,974 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:27,974 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:27,974 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:27,974 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:27,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:27,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1186499, now seen corresponding path program 1 times [2021-06-10 14:33:27,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:27,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005340435] [2021-06-10 14:33:27,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:28,027 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:28,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:28,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005340435] [2021-06-10 14:33:28,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:28,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:28,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739836884] [2021-06-10 14:33:28,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:28,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:28,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:28,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:28,031 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 467 out of 470 [2021-06-10 14:33:28,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 779 places, 468 transitions, 25581 flow. Second operand has 3 states, 3 states have (on average 467.6666666666667) internal successors, (1403), 3 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:28,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:28,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 467 of 470 [2021-06-10 14:33:28,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:28,448 INFO L129 PetriNetUnfolder]: 0/467 cut-off events. [2021-06-10 14:33:28,448 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:28,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13025 conditions, 467 events. 0/467 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 945 event pairs, 0 based on Foata normal form. 156/623 useless extension candidates. Maximal degree in co-relation 0. Up to 156 conditions per place. [2021-06-10 14:33:28,450 INFO L132 encePairwiseOnDemand]: 468/470 looper letters, 0 selfloop transitions, 1 changer transitions 0/467 dead transitions. [2021-06-10 14:33:28,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 467 transitions, 25581 flow [2021-06-10 14:33:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1403 transitions. [2021-06-10 14:33:28,450 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9950354609929078 [2021-06-10 14:33:28,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1403 transitions. [2021-06-10 14:33:28,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1403 transitions. [2021-06-10 14:33:28,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:28,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1403 transitions. [2021-06-10 14:33:28,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 467.6666666666667) internal successors, (1403), 3 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:28,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:28,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:28,452 INFO L185 Difference]: Start difference. First operand has 779 places, 468 transitions, 25581 flow. Second operand 3 states and 1403 transitions. [2021-06-10 14:33:28,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 467 transitions, 25581 flow [2021-06-10 14:33:29,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 780 places, 467 transitions, 1711 flow, removed 11935 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:29,413 INFO L241 Difference]: Finished difference. Result has 780 places, 467 transitions, 1711 flow [2021-06-10 14:33:29,413 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=778, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1711, PETRI_PLACES=780, PETRI_TRANSITIONS=467} [2021-06-10 14:33:29,414 INFO L343 CegarLoopForPetriNet]: 779 programPoint places, 1 predicate places. [2021-06-10 14:33:29,414 INFO L480 AbstractCegarLoop]: Abstraction has has 780 places, 467 transitions, 1711 flow [2021-06-10 14:33:29,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 467.6666666666667) internal successors, (1403), 3 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:29,414 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:29,414 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:29,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308 [2021-06-10 14:33:29,414 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:29,414 INFO L82 PathProgramCache]: Analyzing trace with hash 955941513, now seen corresponding path program 1 times [2021-06-10 14:33:29,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:29,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387831323] [2021-06-10 14:33:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:29,468 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:29,470 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:29,514 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:29,514 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:29,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309 [2021-06-10 14:33:29,515 WARN L342 ceAbstractionStarter]: 155 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:29,515 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 156 thread instances. [2021-06-10 14:33:29,629 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:29,630 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:29,630 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:29,630 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:29,630 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:29,630 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:29,630 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:29,630 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:29,630 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:29,630 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:29,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 786 places, 473 transitions, 25906 flow [2021-06-10 14:33:30,158 INFO L129 PetriNetUnfolder]: 0/941 cut-off events. [2021-06-10 14:33:30,159 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:30,159 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13656 conditions, 941 events. 0/941 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3737 event pairs, 0 based on Foata normal form. 0/784 useless extension candidates. Maximal degree in co-relation 0. Up to 157 conditions per place. [2021-06-10 14:33:30,159 INFO L82 GeneralOperation]: Start removeDead. Operand has 786 places, 473 transitions, 25906 flow [2021-06-10 14:33:30,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 784 places, 471 transitions, 25902 flow [2021-06-10 14:33:30,167 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:30,167 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:30,167 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:30,167 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:30,168 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:30,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1201635, now seen corresponding path program 1 times [2021-06-10 14:33:30,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:30,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274795089] [2021-06-10 14:33:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:30,231 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:30,232 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:30,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274795089] [2021-06-10 14:33:30,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:30,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:30,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272297263] [2021-06-10 14:33:30,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:30,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:30,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:30,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:30,235 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 470 out of 473 [2021-06-10 14:33:30,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 784 places, 471 transitions, 25902 flow. Second operand has 3 states, 3 states have (on average 470.6666666666667) internal successors, (1412), 3 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:30,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:30,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 470 of 473 [2021-06-10 14:33:30,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:30,655 INFO L129 PetriNetUnfolder]: 0/470 cut-off events. [2021-06-10 14:33:30,655 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:30,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13187 conditions, 470 events. 0/470 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 881 event pairs, 0 based on Foata normal form. 157/627 useless extension candidates. Maximal degree in co-relation 0. Up to 157 conditions per place. [2021-06-10 14:33:30,656 INFO L132 encePairwiseOnDemand]: 471/473 looper letters, 0 selfloop transitions, 1 changer transitions 0/470 dead transitions. [2021-06-10 14:33:30,656 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 470 transitions, 25902 flow [2021-06-10 14:33:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1412 transitions. [2021-06-10 14:33:30,657 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9950669485553206 [2021-06-10 14:33:30,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1412 transitions. [2021-06-10 14:33:30,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1412 transitions. [2021-06-10 14:33:30,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:30,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1412 transitions. [2021-06-10 14:33:30,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 470.6666666666667) internal successors, (1412), 3 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:30,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:30,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:30,659 INFO L185 Difference]: Start difference. First operand has 784 places, 471 transitions, 25902 flow. Second operand 3 states and 1412 transitions. [2021-06-10 14:33:30,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 470 transitions, 25902 flow [2021-06-10 14:33:31,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 470 transitions, 1722 flow, removed 12090 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:31,651 INFO L241 Difference]: Finished difference. Result has 785 places, 470 transitions, 1722 flow [2021-06-10 14:33:31,651 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1722, PETRI_PLACES=785, PETRI_TRANSITIONS=470} [2021-06-10 14:33:31,652 INFO L343 CegarLoopForPetriNet]: 784 programPoint places, 1 predicate places. [2021-06-10 14:33:31,652 INFO L480 AbstractCegarLoop]: Abstraction has has 785 places, 470 transitions, 1722 flow [2021-06-10 14:33:31,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 470.6666666666667) internal successors, (1412), 3 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:31,652 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:31,652 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:31,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310 [2021-06-10 14:33:31,652 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:31,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1183893806, now seen corresponding path program 1 times [2021-06-10 14:33:31,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:31,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158810860] [2021-06-10 14:33:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:31,718 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:31,720 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:31,769 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:31,769 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:31,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311 [2021-06-10 14:33:31,769 WARN L342 ceAbstractionStarter]: 156 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:31,769 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 157 thread instances. [2021-06-10 14:33:31,952 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:31,952 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:31,952 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:31,952 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:31,952 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:31,952 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:31,952 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:31,952 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:31,952 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:31,952 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:31,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 791 places, 476 transitions, 26229 flow [2021-06-10 14:33:32,493 INFO L129 PetriNetUnfolder]: 0/947 cut-off events. [2021-06-10 14:33:32,494 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:32,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13822 conditions, 947 events. 0/947 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3601 event pairs, 0 based on Foata normal form. 0/789 useless extension candidates. Maximal degree in co-relation 0. Up to 158 conditions per place. [2021-06-10 14:33:32,494 INFO L82 GeneralOperation]: Start removeDead. Operand has 791 places, 476 transitions, 26229 flow [2021-06-10 14:33:32,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 789 places, 474 transitions, 26225 flow [2021-06-10 14:33:32,503 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:32,503 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:32,503 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:32,503 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:32,503 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:32,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:32,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1216867, now seen corresponding path program 1 times [2021-06-10 14:33:32,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:32,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041884373] [2021-06-10 14:33:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:32,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:32,569 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:32,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041884373] [2021-06-10 14:33:32,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:32,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:32,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816585539] [2021-06-10 14:33:32,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:32,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:32,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:32,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:32,572 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 476 [2021-06-10 14:33:32,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 789 places, 474 transitions, 26225 flow. Second operand has 3 states, 3 states have (on average 473.6666666666667) internal successors, (1421), 3 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:32,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:32,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 476 [2021-06-10 14:33:32,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:33,001 INFO L129 PetriNetUnfolder]: 0/473 cut-off events. [2021-06-10 14:33:33,002 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:33,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13350 conditions, 473 events. 0/473 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 943 event pairs, 0 based on Foata normal form. 158/631 useless extension candidates. Maximal degree in co-relation 0. Up to 158 conditions per place. [2021-06-10 14:33:33,003 INFO L132 encePairwiseOnDemand]: 474/476 looper letters, 0 selfloop transitions, 1 changer transitions 0/473 dead transitions. [2021-06-10 14:33:33,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 790 places, 473 transitions, 26225 flow [2021-06-10 14:33:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:33,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1421 transitions. [2021-06-10 14:33:33,004 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9950980392156863 [2021-06-10 14:33:33,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1421 transitions. [2021-06-10 14:33:33,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1421 transitions. [2021-06-10 14:33:33,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:33,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1421 transitions. [2021-06-10 14:33:33,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 473.6666666666667) internal successors, (1421), 3 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:33,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:33,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:33,006 INFO L185 Difference]: Start difference. First operand has 789 places, 474 transitions, 26225 flow. Second operand 3 states and 1421 transitions. [2021-06-10 14:33:33,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 790 places, 473 transitions, 26225 flow [2021-06-10 14:33:34,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 790 places, 473 transitions, 1733 flow, removed 12246 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:34,044 INFO L241 Difference]: Finished difference. Result has 790 places, 473 transitions, 1733 flow [2021-06-10 14:33:34,044 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=788, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1733, PETRI_PLACES=790, PETRI_TRANSITIONS=473} [2021-06-10 14:33:34,044 INFO L343 CegarLoopForPetriNet]: 789 programPoint places, 1 predicate places. [2021-06-10 14:33:34,044 INFO L480 AbstractCegarLoop]: Abstraction has has 790 places, 473 transitions, 1733 flow [2021-06-10 14:33:34,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 473.6666666666667) internal successors, (1421), 3 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:34,045 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:34,045 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:34,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable312 [2021-06-10 14:33:34,045 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:34,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:34,045 INFO L82 PathProgramCache]: Analyzing trace with hash 465167197, now seen corresponding path program 1 times [2021-06-10 14:33:34,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:34,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470837118] [2021-06-10 14:33:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:34,114 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:34,116 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:34,166 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:34,166 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:34,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313 [2021-06-10 14:33:34,166 WARN L342 ceAbstractionStarter]: 157 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:34,166 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 158 thread instances. [2021-06-10 14:33:34,282 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:34,282 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:34,282 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:34,282 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:34,282 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:34,282 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:34,282 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:34,282 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:34,282 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:34,282 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:34,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 796 places, 479 transitions, 26554 flow [2021-06-10 14:33:34,832 INFO L129 PetriNetUnfolder]: 0/953 cut-off events. [2021-06-10 14:33:34,833 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:34,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13989 conditions, 953 events. 0/953 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3794 event pairs, 0 based on Foata normal form. 0/794 useless extension candidates. Maximal degree in co-relation 0. Up to 159 conditions per place. [2021-06-10 14:33:34,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 796 places, 479 transitions, 26554 flow [2021-06-10 14:33:34,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 794 places, 477 transitions, 26550 flow [2021-06-10 14:33:34,841 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:34,842 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:34,842 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:34,842 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:34,842 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:34,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1232195, now seen corresponding path program 1 times [2021-06-10 14:33:34,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:34,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791691411] [2021-06-10 14:33:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:34,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:34,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:34,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791691411] [2021-06-10 14:33:34,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:34,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:34,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761721767] [2021-06-10 14:33:34,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:34,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:34,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:34,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:34,912 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 479 [2021-06-10 14:33:34,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 794 places, 477 transitions, 26550 flow. Second operand has 3 states, 3 states have (on average 476.6666666666667) internal successors, (1430), 3 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:34,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:34,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 479 [2021-06-10 14:33:34,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:35,346 INFO L129 PetriNetUnfolder]: 0/476 cut-off events. [2021-06-10 14:33:35,346 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:35,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13514 conditions, 476 events. 0/476 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 878 event pairs, 0 based on Foata normal form. 159/635 useless extension candidates. Maximal degree in co-relation 0. Up to 159 conditions per place. [2021-06-10 14:33:35,347 INFO L132 encePairwiseOnDemand]: 477/479 looper letters, 0 selfloop transitions, 1 changer transitions 0/476 dead transitions. [2021-06-10 14:33:35,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 476 transitions, 26550 flow [2021-06-10 14:33:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1430 transitions. [2021-06-10 14:33:35,348 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9951287404314544 [2021-06-10 14:33:35,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1430 transitions. [2021-06-10 14:33:35,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1430 transitions. [2021-06-10 14:33:35,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:35,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1430 transitions. [2021-06-10 14:33:35,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 476.6666666666667) internal successors, (1430), 3 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:35,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:35,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:35,350 INFO L185 Difference]: Start difference. First operand has 794 places, 477 transitions, 26550 flow. Second operand 3 states and 1430 transitions. [2021-06-10 14:33:35,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 795 places, 476 transitions, 26550 flow [2021-06-10 14:33:36,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 476 transitions, 1744 flow, removed 12403 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:36,389 INFO L241 Difference]: Finished difference. Result has 795 places, 476 transitions, 1744 flow [2021-06-10 14:33:36,389 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1744, PETRI_PLACES=795, PETRI_TRANSITIONS=476} [2021-06-10 14:33:36,389 INFO L343 CegarLoopForPetriNet]: 794 programPoint places, 1 predicate places. [2021-06-10 14:33:36,389 INFO L480 AbstractCegarLoop]: Abstraction has has 795 places, 476 transitions, 1744 flow [2021-06-10 14:33:36,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 476.6666666666667) internal successors, (1430), 3 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:36,389 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:36,389 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:36,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314 [2021-06-10 14:33:36,389 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:36,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:36,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1836096341, now seen corresponding path program 1 times [2021-06-10 14:33:36,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:36,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070488265] [2021-06-10 14:33:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:36,457 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:36,459 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:36,509 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:36,509 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:36,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315 [2021-06-10 14:33:36,509 WARN L342 ceAbstractionStarter]: 158 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:36,509 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 159 thread instances. [2021-06-10 14:33:36,625 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:36,625 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:36,626 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:36,626 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:36,626 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:36,626 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:36,626 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:36,626 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:36,626 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:36,626 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:36,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 801 places, 482 transitions, 26881 flow [2021-06-10 14:33:37,277 INFO L129 PetriNetUnfolder]: 0/959 cut-off events. [2021-06-10 14:33:37,277 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:37,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14157 conditions, 959 events. 0/959 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3698 event pairs, 0 based on Foata normal form. 0/799 useless extension candidates. Maximal degree in co-relation 0. Up to 160 conditions per place. [2021-06-10 14:33:37,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 801 places, 482 transitions, 26881 flow [2021-06-10 14:33:37,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 799 places, 480 transitions, 26877 flow [2021-06-10 14:33:37,286 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:37,286 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:37,287 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:37,287 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:37,287 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:37,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:37,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1247619, now seen corresponding path program 1 times [2021-06-10 14:33:37,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:37,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718991090] [2021-06-10 14:33:37,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:37,355 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:37,355 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:37,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718991090] [2021-06-10 14:33:37,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:37,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:37,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227651365] [2021-06-10 14:33:37,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:37,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:37,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:37,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:37,358 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 482 [2021-06-10 14:33:37,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 799 places, 480 transitions, 26877 flow. Second operand has 3 states, 3 states have (on average 479.6666666666667) internal successors, (1439), 3 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:37,359 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:37,359 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 482 [2021-06-10 14:33:37,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:37,806 INFO L129 PetriNetUnfolder]: 0/479 cut-off events. [2021-06-10 14:33:37,807 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:37,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13679 conditions, 479 events. 0/479 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 979 event pairs, 0 based on Foata normal form. 160/639 useless extension candidates. Maximal degree in co-relation 0. Up to 160 conditions per place. [2021-06-10 14:33:37,808 INFO L132 encePairwiseOnDemand]: 480/482 looper letters, 0 selfloop transitions, 1 changer transitions 0/479 dead transitions. [2021-06-10 14:33:37,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 800 places, 479 transitions, 26877 flow [2021-06-10 14:33:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1439 transitions. [2021-06-10 14:33:37,809 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9951590594744122 [2021-06-10 14:33:37,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1439 transitions. [2021-06-10 14:33:37,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1439 transitions. [2021-06-10 14:33:37,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:37,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1439 transitions. [2021-06-10 14:33:37,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 479.6666666666667) internal successors, (1439), 3 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:37,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:37,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:37,810 INFO L185 Difference]: Start difference. First operand has 799 places, 480 transitions, 26877 flow. Second operand 3 states and 1439 transitions. [2021-06-10 14:33:37,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 800 places, 479 transitions, 26877 flow [2021-06-10 14:33:38,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 479 transitions, 1755 flow, removed 12561 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:38,876 INFO L241 Difference]: Finished difference. Result has 800 places, 479 transitions, 1755 flow [2021-06-10 14:33:38,876 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=798, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1755, PETRI_PLACES=800, PETRI_TRANSITIONS=479} [2021-06-10 14:33:38,876 INFO L343 CegarLoopForPetriNet]: 799 programPoint places, 1 predicate places. [2021-06-10 14:33:38,876 INFO L480 AbstractCegarLoop]: Abstraction has has 800 places, 479 transitions, 1755 flow [2021-06-10 14:33:38,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 479.6666666666667) internal successors, (1439), 3 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:38,876 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:38,876 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:38,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316 [2021-06-10 14:33:38,876 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:38,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1159513091, now seen corresponding path program 1 times [2021-06-10 14:33:38,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:38,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724488686] [2021-06-10 14:33:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:38,944 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:38,946 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:38,996 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:38,996 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:38,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317 [2021-06-10 14:33:38,997 WARN L342 ceAbstractionStarter]: 159 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:38,997 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 160 thread instances. [2021-06-10 14:33:39,113 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:39,114 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:39,114 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:39,114 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:39,114 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:39,114 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:39,114 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:39,114 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:39,114 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:39,114 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:39,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 806 places, 485 transitions, 27210 flow [2021-06-10 14:33:39,680 INFO L129 PetriNetUnfolder]: 0/965 cut-off events. [2021-06-10 14:33:39,680 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:39,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14326 conditions, 965 events. 0/965 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3784 event pairs, 0 based on Foata normal form. 0/804 useless extension candidates. Maximal degree in co-relation 0. Up to 161 conditions per place. [2021-06-10 14:33:39,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 806 places, 485 transitions, 27210 flow [2021-06-10 14:33:39,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 804 places, 483 transitions, 27206 flow [2021-06-10 14:33:39,690 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:39,690 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:39,690 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:39,690 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:39,690 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:39,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:39,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1263139, now seen corresponding path program 1 times [2021-06-10 14:33:39,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:39,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918489898] [2021-06-10 14:33:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:39,762 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:39,762 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:39,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918489898] [2021-06-10 14:33:39,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:39,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:39,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356603889] [2021-06-10 14:33:39,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:39,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:39,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:39,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:39,765 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 482 out of 485 [2021-06-10 14:33:39,766 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 804 places, 483 transitions, 27206 flow. Second operand has 3 states, 3 states have (on average 482.6666666666667) internal successors, (1448), 3 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:39,766 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:39,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 482 of 485 [2021-06-10 14:33:39,766 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:40,216 INFO L129 PetriNetUnfolder]: 0/482 cut-off events. [2021-06-10 14:33:40,216 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:40,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13845 conditions, 482 events. 0/482 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 868 event pairs, 0 based on Foata normal form. 161/643 useless extension candidates. Maximal degree in co-relation 0. Up to 161 conditions per place. [2021-06-10 14:33:40,218 INFO L132 encePairwiseOnDemand]: 483/485 looper letters, 0 selfloop transitions, 1 changer transitions 0/482 dead transitions. [2021-06-10 14:33:40,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 805 places, 482 transitions, 27206 flow [2021-06-10 14:33:40,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1448 transitions. [2021-06-10 14:33:40,218 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9951890034364261 [2021-06-10 14:33:40,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1448 transitions. [2021-06-10 14:33:40,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1448 transitions. [2021-06-10 14:33:40,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:40,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1448 transitions. [2021-06-10 14:33:40,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 482.6666666666667) internal successors, (1448), 3 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:40,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:40,220 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:40,220 INFO L185 Difference]: Start difference. First operand has 804 places, 483 transitions, 27206 flow. Second operand 3 states and 1448 transitions. [2021-06-10 14:33:40,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 805 places, 482 transitions, 27206 flow [2021-06-10 14:33:41,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 805 places, 482 transitions, 1766 flow, removed 12720 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:41,337 INFO L241 Difference]: Finished difference. Result has 805 places, 482 transitions, 1766 flow [2021-06-10 14:33:41,337 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=803, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1766, PETRI_PLACES=805, PETRI_TRANSITIONS=482} [2021-06-10 14:33:41,337 INFO L343 CegarLoopForPetriNet]: 804 programPoint places, 1 predicate places. [2021-06-10 14:33:41,337 INFO L480 AbstractCegarLoop]: Abstraction has has 805 places, 482 transitions, 1766 flow [2021-06-10 14:33:41,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 482.6666666666667) internal successors, (1448), 3 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:41,337 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:41,337 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:41,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318 [2021-06-10 14:33:41,338 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:41,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:41,338 INFO L82 PathProgramCache]: Analyzing trace with hash -256259304, now seen corresponding path program 1 times [2021-06-10 14:33:41,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:41,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756762486] [2021-06-10 14:33:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:41,407 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:41,409 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:41,461 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:41,461 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:41,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319 [2021-06-10 14:33:41,461 WARN L342 ceAbstractionStarter]: 160 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:41,461 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 161 thread instances. [2021-06-10 14:33:41,577 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:41,578 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:41,578 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:41,578 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:41,578 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:41,578 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:41,578 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:41,578 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:41,578 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:41,578 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:41,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 811 places, 488 transitions, 27541 flow [2021-06-10 14:33:42,284 INFO L129 PetriNetUnfolder]: 0/971 cut-off events. [2021-06-10 14:33:42,284 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:42,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14496 conditions, 971 events. 0/971 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3643 event pairs, 0 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 0. Up to 162 conditions per place. [2021-06-10 14:33:42,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 811 places, 488 transitions, 27541 flow [2021-06-10 14:33:42,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 809 places, 486 transitions, 27537 flow [2021-06-10 14:33:42,294 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:42,294 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:42,294 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:42,294 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:42,294 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:42,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:42,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1278755, now seen corresponding path program 1 times [2021-06-10 14:33:42,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:42,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190996678] [2021-06-10 14:33:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:42,363 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:42,363 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:42,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190996678] [2021-06-10 14:33:42,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:42,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:42,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714265030] [2021-06-10 14:33:42,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:42,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:42,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:42,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:42,366 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 485 out of 488 [2021-06-10 14:33:42,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 486 transitions, 27537 flow. Second operand has 3 states, 3 states have (on average 485.6666666666667) internal successors, (1457), 3 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:42,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:42,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 485 of 488 [2021-06-10 14:33:42,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:42,826 INFO L129 PetriNetUnfolder]: 0/485 cut-off events. [2021-06-10 14:33:42,827 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:42,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14012 conditions, 485 events. 0/485 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 990 event pairs, 0 based on Foata normal form. 162/647 useless extension candidates. Maximal degree in co-relation 0. Up to 162 conditions per place. [2021-06-10 14:33:42,828 INFO L132 encePairwiseOnDemand]: 486/488 looper letters, 0 selfloop transitions, 1 changer transitions 0/485 dead transitions. [2021-06-10 14:33:42,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 485 transitions, 27537 flow [2021-06-10 14:33:42,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1457 transitions. [2021-06-10 14:33:42,829 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9952185792349727 [2021-06-10 14:33:42,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1457 transitions. [2021-06-10 14:33:42,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1457 transitions. [2021-06-10 14:33:42,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:42,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1457 transitions. [2021-06-10 14:33:42,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 485.6666666666667) internal successors, (1457), 3 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:42,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:42,831 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:42,831 INFO L185 Difference]: Start difference. First operand has 809 places, 486 transitions, 27537 flow. Second operand 3 states and 1457 transitions. [2021-06-10 14:33:42,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 810 places, 485 transitions, 27537 flow [2021-06-10 14:33:43,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 485 transitions, 1777 flow, removed 12880 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:43,975 INFO L241 Difference]: Finished difference. Result has 810 places, 485 transitions, 1777 flow [2021-06-10 14:33:43,975 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=808, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1777, PETRI_PLACES=810, PETRI_TRANSITIONS=485} [2021-06-10 14:33:43,975 INFO L343 CegarLoopForPetriNet]: 809 programPoint places, 1 predicate places. [2021-06-10 14:33:43,976 INFO L480 AbstractCegarLoop]: Abstraction has has 810 places, 485 transitions, 1777 flow [2021-06-10 14:33:43,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 485.6666666666667) internal successors, (1457), 3 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:43,976 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:43,976 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:43,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320 [2021-06-10 14:33:43,976 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:43,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:43,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1811296233, now seen corresponding path program 1 times [2021-06-10 14:33:43,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:43,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723545252] [2021-06-10 14:33:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:44,048 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:44,050 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:44,102 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:44,102 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:44,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321 [2021-06-10 14:33:44,102 WARN L342 ceAbstractionStarter]: 161 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:44,102 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 162 thread instances. [2021-06-10 14:33:44,228 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:44,228 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:44,228 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:44,228 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:44,228 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:44,228 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:44,228 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:44,228 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:44,228 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:44,228 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:44,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 816 places, 491 transitions, 27874 flow [2021-06-10 14:33:44,818 INFO L129 PetriNetUnfolder]: 0/977 cut-off events. [2021-06-10 14:33:44,819 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:44,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14667 conditions, 977 events. 0/977 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3760 event pairs, 0 based on Foata normal form. 0/814 useless extension candidates. Maximal degree in co-relation 0. Up to 163 conditions per place. [2021-06-10 14:33:44,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 816 places, 491 transitions, 27874 flow [2021-06-10 14:33:44,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 814 places, 489 transitions, 27870 flow [2021-06-10 14:33:44,828 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:44,828 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:44,828 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:44,828 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:44,828 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:44,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:44,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1294467, now seen corresponding path program 1 times [2021-06-10 14:33:44,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:44,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71027278] [2021-06-10 14:33:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:44,900 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:44,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:44,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71027278] [2021-06-10 14:33:44,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:44,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:44,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583972136] [2021-06-10 14:33:44,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:44,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:44,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:44,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:44,904 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 488 out of 491 [2021-06-10 14:33:44,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 814 places, 489 transitions, 27870 flow. Second operand has 3 states, 3 states have (on average 488.6666666666667) internal successors, (1466), 3 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:44,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:44,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 488 of 491 [2021-06-10 14:33:44,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:45,370 INFO L129 PetriNetUnfolder]: 0/488 cut-off events. [2021-06-10 14:33:45,370 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:45,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14180 conditions, 488 events. 0/488 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 833 event pairs, 0 based on Foata normal form. 163/651 useless extension candidates. Maximal degree in co-relation 0. Up to 163 conditions per place. [2021-06-10 14:33:45,371 INFO L132 encePairwiseOnDemand]: 489/491 looper letters, 0 selfloop transitions, 1 changer transitions 0/488 dead transitions. [2021-06-10 14:33:45,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 488 transitions, 27870 flow [2021-06-10 14:33:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1466 transitions. [2021-06-10 14:33:45,372 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9952477936184657 [2021-06-10 14:33:45,372 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1466 transitions. [2021-06-10 14:33:45,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1466 transitions. [2021-06-10 14:33:45,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:45,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1466 transitions. [2021-06-10 14:33:45,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 488.6666666666667) internal successors, (1466), 3 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:45,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 491.0) internal successors, (1964), 4 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:45,374 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 491.0) internal successors, (1964), 4 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:45,374 INFO L185 Difference]: Start difference. First operand has 814 places, 489 transitions, 27870 flow. Second operand 3 states and 1466 transitions. [2021-06-10 14:33:45,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 815 places, 488 transitions, 27870 flow [2021-06-10 14:33:46,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 815 places, 488 transitions, 1788 flow, removed 13041 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:46,820 INFO L241 Difference]: Finished difference. Result has 815 places, 488 transitions, 1788 flow [2021-06-10 14:33:46,820 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=491, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=813, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1788, PETRI_PLACES=815, PETRI_TRANSITIONS=488} [2021-06-10 14:33:46,820 INFO L343 CegarLoopForPetriNet]: 814 programPoint places, 1 predicate places. [2021-06-10 14:33:46,820 INFO L480 AbstractCegarLoop]: Abstraction has has 815 places, 488 transitions, 1788 flow [2021-06-10 14:33:46,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 488.6666666666667) internal successors, (1466), 3 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:46,820 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:46,820 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:46,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable322 [2021-06-10 14:33:46,820 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:46,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1879702885, now seen corresponding path program 1 times [2021-06-10 14:33:46,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:46,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621476274] [2021-06-10 14:33:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:46,901 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:46,903 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:46,955 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:46,956 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:46,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323 [2021-06-10 14:33:46,956 WARN L342 ceAbstractionStarter]: 162 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:46,956 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 163 thread instances. [2021-06-10 14:33:47,071 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:47,072 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:47,072 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:47,072 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:47,072 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:47,072 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:47,072 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:47,072 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:47,072 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:47,072 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:47,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 821 places, 494 transitions, 28209 flow [2021-06-10 14:33:47,870 INFO L129 PetriNetUnfolder]: 0/983 cut-off events. [2021-06-10 14:33:47,871 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:47,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14839 conditions, 983 events. 0/983 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3823 event pairs, 0 based on Foata normal form. 0/819 useless extension candidates. Maximal degree in co-relation 0. Up to 164 conditions per place. [2021-06-10 14:33:47,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 821 places, 494 transitions, 28209 flow [2021-06-10 14:33:47,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 819 places, 492 transitions, 28205 flow [2021-06-10 14:33:47,881 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:47,881 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:47,881 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:47,881 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:47,881 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:47,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1310275, now seen corresponding path program 1 times [2021-06-10 14:33:47,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:47,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785021919] [2021-06-10 14:33:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:47,967 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:47,968 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:47,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785021919] [2021-06-10 14:33:47,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:47,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:47,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981512656] [2021-06-10 14:33:47,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:47,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:47,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:47,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:47,971 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 494 [2021-06-10 14:33:47,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 819 places, 492 transitions, 28205 flow. Second operand has 3 states, 3 states have (on average 491.6666666666667) internal successors, (1475), 3 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:47,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:47,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 494 [2021-06-10 14:33:47,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:48,439 INFO L129 PetriNetUnfolder]: 0/491 cut-off events. [2021-06-10 14:33:48,439 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:48,439 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14349 conditions, 491 events. 0/491 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 990 event pairs, 0 based on Foata normal form. 164/655 useless extension candidates. Maximal degree in co-relation 0. Up to 164 conditions per place. [2021-06-10 14:33:48,441 INFO L132 encePairwiseOnDemand]: 492/494 looper letters, 0 selfloop transitions, 1 changer transitions 0/491 dead transitions. [2021-06-10 14:33:48,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 491 transitions, 28205 flow [2021-06-10 14:33:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1475 transitions. [2021-06-10 14:33:48,442 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.99527665317139 [2021-06-10 14:33:48,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1475 transitions. [2021-06-10 14:33:48,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1475 transitions. [2021-06-10 14:33:48,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:48,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1475 transitions. [2021-06-10 14:33:48,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 491.6666666666667) internal successors, (1475), 3 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:48,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:48,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:48,443 INFO L185 Difference]: Start difference. First operand has 819 places, 492 transitions, 28205 flow. Second operand 3 states and 1475 transitions. [2021-06-10 14:33:48,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 491 transitions, 28205 flow [2021-06-10 14:33:49,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 820 places, 491 transitions, 1799 flow, removed 13203 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:49,689 INFO L241 Difference]: Finished difference. Result has 820 places, 491 transitions, 1799 flow [2021-06-10 14:33:49,690 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=818, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1799, PETRI_PLACES=820, PETRI_TRANSITIONS=491} [2021-06-10 14:33:49,690 INFO L343 CegarLoopForPetriNet]: 819 programPoint places, 1 predicate places. [2021-06-10 14:33:49,690 INFO L480 AbstractCegarLoop]: Abstraction has has 820 places, 491 transitions, 1799 flow [2021-06-10 14:33:49,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 491.6666666666667) internal successors, (1475), 3 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:49,690 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:49,690 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:49,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324 [2021-06-10 14:33:49,690 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:49,690 INFO L82 PathProgramCache]: Analyzing trace with hash -29318495, now seen corresponding path program 1 times [2021-06-10 14:33:49,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:49,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816996334] [2021-06-10 14:33:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:49,793 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:49,796 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:49,849 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:49,849 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:49,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325 [2021-06-10 14:33:49,849 WARN L342 ceAbstractionStarter]: 163 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:49,849 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 164 thread instances. [2021-06-10 14:33:49,969 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:49,969 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:49,969 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:49,969 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:49,969 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:49,969 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:49,970 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:49,970 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:49,970 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:49,970 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:49,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 826 places, 497 transitions, 28546 flow [2021-06-10 14:33:50,580 INFO L129 PetriNetUnfolder]: 0/989 cut-off events. [2021-06-10 14:33:50,581 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:50,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15012 conditions, 989 events. 0/989 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3881 event pairs, 0 based on Foata normal form. 0/824 useless extension candidates. Maximal degree in co-relation 0. Up to 165 conditions per place. [2021-06-10 14:33:50,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 826 places, 497 transitions, 28546 flow [2021-06-10 14:33:50,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 824 places, 495 transitions, 28542 flow [2021-06-10 14:33:50,590 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:33:50,590 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:50,590 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:50,590 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:50,590 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:50,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1326179, now seen corresponding path program 1 times [2021-06-10 14:33:50,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:50,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047916125] [2021-06-10 14:33:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:50,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:50,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:50,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047916125] [2021-06-10 14:33:50,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:50,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:50,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244047912] [2021-06-10 14:33:50,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:50,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:50,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:50,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:50,662 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 497 [2021-06-10 14:33:50,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 495 transitions, 28542 flow. Second operand has 3 states, 3 states have (on average 494.6666666666667) internal successors, (1484), 3 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:50,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:50,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 497 [2021-06-10 14:33:50,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:51,201 INFO L129 PetriNetUnfolder]: 0/494 cut-off events. [2021-06-10 14:33:51,201 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:51,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14519 conditions, 494 events. 0/494 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 885 event pairs, 0 based on Foata normal form. 165/659 useless extension candidates. Maximal degree in co-relation 0. Up to 165 conditions per place. [2021-06-10 14:33:51,202 INFO L132 encePairwiseOnDemand]: 495/497 looper letters, 0 selfloop transitions, 1 changer transitions 0/494 dead transitions. [2021-06-10 14:33:51,202 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 494 transitions, 28542 flow [2021-06-10 14:33:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1484 transitions. [2021-06-10 14:33:51,203 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9953051643192489 [2021-06-10 14:33:51,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1484 transitions. [2021-06-10 14:33:51,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1484 transitions. [2021-06-10 14:33:51,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:51,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1484 transitions. [2021-06-10 14:33:51,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 494.6666666666667) internal successors, (1484), 3 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:51,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:51,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:51,205 INFO L185 Difference]: Start difference. First operand has 824 places, 495 transitions, 28542 flow. Second operand 3 states and 1484 transitions. [2021-06-10 14:33:51,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 494 transitions, 28542 flow [2021-06-10 14:33:52,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 494 transitions, 1810 flow, removed 13366 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:52,460 INFO L241 Difference]: Finished difference. Result has 825 places, 494 transitions, 1810 flow [2021-06-10 14:33:52,460 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1810, PETRI_PLACES=825, PETRI_TRANSITIONS=494} [2021-06-10 14:33:52,460 INFO L343 CegarLoopForPetriNet]: 824 programPoint places, 1 predicate places. [2021-06-10 14:33:52,460 INFO L480 AbstractCegarLoop]: Abstraction has has 825 places, 494 transitions, 1810 flow [2021-06-10 14:33:52,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 494.6666666666667) internal successors, (1484), 3 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:52,460 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:52,460 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:52,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326 [2021-06-10 14:33:52,461 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:52,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1099284898, now seen corresponding path program 1 times [2021-06-10 14:33:52,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:52,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136759416] [2021-06-10 14:33:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:52,538 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:52,540 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:52,595 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:52,595 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:52,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327 [2021-06-10 14:33:52,595 WARN L342 ceAbstractionStarter]: 164 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:52,595 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 165 thread instances. [2021-06-10 14:33:52,773 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:52,773 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:52,773 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:52,773 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:52,774 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:52,774 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:52,774 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:52,774 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:52,774 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:52,774 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:52,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 831 places, 500 transitions, 28885 flow [2021-06-10 14:33:53,386 INFO L129 PetriNetUnfolder]: 0/995 cut-off events. [2021-06-10 14:33:53,387 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:53,387 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15186 conditions, 995 events. 0/995 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3872 event pairs, 0 based on Foata normal form. 0/829 useless extension candidates. Maximal degree in co-relation 0. Up to 166 conditions per place. [2021-06-10 14:33:53,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 831 places, 500 transitions, 28885 flow [2021-06-10 14:33:53,395 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 829 places, 498 transitions, 28881 flow [2021-06-10 14:33:53,396 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:53,396 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:53,396 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:53,396 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:53,396 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:53,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1342179, now seen corresponding path program 1 times [2021-06-10 14:33:53,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:53,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617875241] [2021-06-10 14:33:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:53,466 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:53,466 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:53,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617875241] [2021-06-10 14:33:53,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:53,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:53,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660274909] [2021-06-10 14:33:53,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:53,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:53,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:53,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:53,469 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 500 [2021-06-10 14:33:53,469 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 498 transitions, 28881 flow. Second operand has 3 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:53,469 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:53,469 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 500 [2021-06-10 14:33:53,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:53,957 INFO L129 PetriNetUnfolder]: 0/497 cut-off events. [2021-06-10 14:33:53,957 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:53,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14690 conditions, 497 events. 0/497 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 963 event pairs, 0 based on Foata normal form. 166/663 useless extension candidates. Maximal degree in co-relation 0. Up to 166 conditions per place. [2021-06-10 14:33:53,958 INFO L132 encePairwiseOnDemand]: 498/500 looper letters, 0 selfloop transitions, 1 changer transitions 0/497 dead transitions. [2021-06-10 14:33:53,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 830 places, 497 transitions, 28881 flow [2021-06-10 14:33:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1493 transitions. [2021-06-10 14:33:53,959 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9953333333333333 [2021-06-10 14:33:53,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1493 transitions. [2021-06-10 14:33:53,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1493 transitions. [2021-06-10 14:33:53,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:53,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1493 transitions. [2021-06-10 14:33:53,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:53,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:53,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:53,961 INFO L185 Difference]: Start difference. First operand has 829 places, 498 transitions, 28881 flow. Second operand 3 states and 1493 transitions. [2021-06-10 14:33:53,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 830 places, 497 transitions, 28881 flow [2021-06-10 14:33:55,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 830 places, 497 transitions, 1821 flow, removed 13530 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:55,487 INFO L241 Difference]: Finished difference. Result has 830 places, 497 transitions, 1821 flow [2021-06-10 14:33:55,487 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=828, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1821, PETRI_PLACES=830, PETRI_TRANSITIONS=497} [2021-06-10 14:33:55,488 INFO L343 CegarLoopForPetriNet]: 829 programPoint places, 1 predicate places. [2021-06-10 14:33:55,488 INFO L480 AbstractCegarLoop]: Abstraction has has 830 places, 497 transitions, 1821 flow [2021-06-10 14:33:55,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:55,488 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:55,488 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:55,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328 [2021-06-10 14:33:55,488 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:55,488 INFO L82 PathProgramCache]: Analyzing trace with hash -932268123, now seen corresponding path program 1 times [2021-06-10 14:33:55,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:55,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981703606] [2021-06-10 14:33:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:55,558 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:55,561 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:55,614 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:55,614 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:55,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329 [2021-06-10 14:33:55,615 WARN L342 ceAbstractionStarter]: 165 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:55,615 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 166 thread instances. [2021-06-10 14:33:55,743 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:55,743 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:55,744 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:55,744 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:55,744 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:55,744 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:55,744 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:55,744 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:55,744 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:55,744 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:55,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 836 places, 503 transitions, 29226 flow [2021-06-10 14:33:56,539 INFO L129 PetriNetUnfolder]: 0/1001 cut-off events. [2021-06-10 14:33:56,539 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:56,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15361 conditions, 1001 events. 0/1001 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3796 event pairs, 0 based on Foata normal form. 0/834 useless extension candidates. Maximal degree in co-relation 0. Up to 167 conditions per place. [2021-06-10 14:33:56,539 INFO L82 GeneralOperation]: Start removeDead. Operand has 836 places, 503 transitions, 29226 flow [2021-06-10 14:33:56,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 834 places, 501 transitions, 29222 flow [2021-06-10 14:33:56,549 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:56,549 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:56,549 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:56,549 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:56,549 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:56,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:56,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1358275, now seen corresponding path program 1 times [2021-06-10 14:33:56,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:56,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647761295] [2021-06-10 14:33:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:56,727 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:56,727 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:56,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647761295] [2021-06-10 14:33:56,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:56,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:56,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416120323] [2021-06-10 14:33:56,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:56,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:56,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:56,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:56,730 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 503 [2021-06-10 14:33:56,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 834 places, 501 transitions, 29222 flow. Second operand has 3 states, 3 states have (on average 500.6666666666667) internal successors, (1502), 3 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:56,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:56,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 503 [2021-06-10 14:33:56,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:33:57,328 INFO L129 PetriNetUnfolder]: 0/500 cut-off events. [2021-06-10 14:33:57,328 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:57,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14862 conditions, 500 events. 0/500 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1032 event pairs, 0 based on Foata normal form. 167/667 useless extension candidates. Maximal degree in co-relation 0. Up to 167 conditions per place. [2021-06-10 14:33:57,329 INFO L132 encePairwiseOnDemand]: 501/503 looper letters, 0 selfloop transitions, 1 changer transitions 0/500 dead transitions. [2021-06-10 14:33:57,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 500 transitions, 29222 flow [2021-06-10 14:33:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:33:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:33:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1502 transitions. [2021-06-10 14:33:57,330 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9953611663353215 [2021-06-10 14:33:57,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1502 transitions. [2021-06-10 14:33:57,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1502 transitions. [2021-06-10 14:33:57,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:33:57,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1502 transitions. [2021-06-10 14:33:57,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 500.6666666666667) internal successors, (1502), 3 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:57,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:57,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:57,332 INFO L185 Difference]: Start difference. First operand has 834 places, 501 transitions, 29222 flow. Second operand 3 states and 1502 transitions. [2021-06-10 14:33:57,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 500 transitions, 29222 flow [2021-06-10 14:33:58,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 835 places, 500 transitions, 1832 flow, removed 13695 selfloop flow, removed 0 redundant places. [2021-06-10 14:33:58,739 INFO L241 Difference]: Finished difference. Result has 835 places, 500 transitions, 1832 flow [2021-06-10 14:33:58,739 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=833, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1832, PETRI_PLACES=835, PETRI_TRANSITIONS=500} [2021-06-10 14:33:58,739 INFO L343 CegarLoopForPetriNet]: 834 programPoint places, 1 predicate places. [2021-06-10 14:33:58,739 INFO L480 AbstractCegarLoop]: Abstraction has has 835 places, 500 transitions, 1832 flow [2021-06-10 14:33:58,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 500.6666666666667) internal successors, (1502), 3 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:58,740 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:58,740 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:33:58,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330 [2021-06-10 14:33:58,740 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:58,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1538603745, now seen corresponding path program 1 times [2021-06-10 14:33:58,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:58,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160571014] [2021-06-10 14:33:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:58,810 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:33:58,812 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:33:58,866 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:33:58,866 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:33:58,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331 [2021-06-10 14:33:58,866 WARN L342 ceAbstractionStarter]: 166 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:33:58,866 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 167 thread instances. [2021-06-10 14:33:59,054 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:33:59,054 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:33:59,055 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:33:59,055 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:33:59,055 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:33:59,055 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:33:59,055 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:33:59,055 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:33:59,055 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:33:59,055 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:33:59,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 841 places, 506 transitions, 29569 flow [2021-06-10 14:33:59,819 INFO L129 PetriNetUnfolder]: 0/1007 cut-off events. [2021-06-10 14:33:59,819 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:59,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15537 conditions, 1007 events. 0/1007 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4026 event pairs, 0 based on Foata normal form. 0/839 useless extension candidates. Maximal degree in co-relation 0. Up to 168 conditions per place. [2021-06-10 14:33:59,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 841 places, 506 transitions, 29569 flow [2021-06-10 14:33:59,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 839 places, 504 transitions, 29565 flow [2021-06-10 14:33:59,829 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:33:59,829 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:33:59,829 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:33:59,829 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:33:59,829 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:33:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:33:59,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1374467, now seen corresponding path program 1 times [2021-06-10 14:33:59,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:33:59,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652869306] [2021-06-10 14:33:59,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:33:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:33:59,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:33:59,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:33:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:33:59,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652869306] [2021-06-10 14:33:59,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:33:59,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:33:59,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480524561] [2021-06-10 14:33:59,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:33:59,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:33:59,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:33:59,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:33:59,903 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 506 [2021-06-10 14:33:59,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 839 places, 504 transitions, 29565 flow. Second operand has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:33:59,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:33:59,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 506 [2021-06-10 14:33:59,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:00,575 INFO L129 PetriNetUnfolder]: 0/503 cut-off events. [2021-06-10 14:34:00,575 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:00,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15035 conditions, 503 events. 0/503 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 986 event pairs, 0 based on Foata normal form. 168/671 useless extension candidates. Maximal degree in co-relation 0. Up to 168 conditions per place. [2021-06-10 14:34:00,576 INFO L132 encePairwiseOnDemand]: 504/506 looper letters, 0 selfloop transitions, 1 changer transitions 0/503 dead transitions. [2021-06-10 14:34:00,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 840 places, 503 transitions, 29565 flow [2021-06-10 14:34:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1511 transitions. [2021-06-10 14:34:00,577 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9953886693017128 [2021-06-10 14:34:00,577 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1511 transitions. [2021-06-10 14:34:00,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1511 transitions. [2021-06-10 14:34:00,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:00,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1511 transitions. [2021-06-10 14:34:00,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:00,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:00,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:00,579 INFO L185 Difference]: Start difference. First operand has 839 places, 504 transitions, 29565 flow. Second operand 3 states and 1511 transitions. [2021-06-10 14:34:00,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 840 places, 503 transitions, 29565 flow [2021-06-10 14:34:01,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 840 places, 503 transitions, 1843 flow, removed 13861 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:01,974 INFO L241 Difference]: Finished difference. Result has 840 places, 503 transitions, 1843 flow [2021-06-10 14:34:01,974 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=838, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1843, PETRI_PLACES=840, PETRI_TRANSITIONS=503} [2021-06-10 14:34:01,974 INFO L343 CegarLoopForPetriNet]: 839 programPoint places, 1 predicate places. [2021-06-10 14:34:01,974 INFO L480 AbstractCegarLoop]: Abstraction has has 840 places, 503 transitions, 1843 flow [2021-06-10 14:34:01,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:01,974 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:01,974 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:01,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332 [2021-06-10 14:34:01,975 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:01,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:01,975 INFO L82 PathProgramCache]: Analyzing trace with hash 807064181, now seen corresponding path program 1 times [2021-06-10 14:34:01,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:01,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753791574] [2021-06-10 14:34:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:02,069 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:02,072 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:02,131 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:02,132 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:02,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333 [2021-06-10 14:34:02,132 WARN L342 ceAbstractionStarter]: 167 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:02,132 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 168 thread instances. [2021-06-10 14:34:02,269 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:02,270 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:02,270 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:02,270 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:02,270 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:02,270 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:02,270 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:02,270 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:02,270 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:02,270 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:02,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 846 places, 509 transitions, 29914 flow [2021-06-10 14:34:03,045 INFO L129 PetriNetUnfolder]: 0/1013 cut-off events. [2021-06-10 14:34:03,046 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:03,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15714 conditions, 1013 events. 0/1013 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4032 event pairs, 0 based on Foata normal form. 0/844 useless extension candidates. Maximal degree in co-relation 0. Up to 169 conditions per place. [2021-06-10 14:34:03,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 846 places, 509 transitions, 29914 flow [2021-06-10 14:34:03,055 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 844 places, 507 transitions, 29910 flow [2021-06-10 14:34:03,056 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:34:03,056 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:03,056 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:03,056 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:03,056 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:03,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1390755, now seen corresponding path program 1 times [2021-06-10 14:34:03,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:03,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296159008] [2021-06-10 14:34:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:03,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:03,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:03,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296159008] [2021-06-10 14:34:03,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:03,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:03,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314176694] [2021-06-10 14:34:03,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:03,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:03,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:03,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:03,134 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 506 out of 509 [2021-06-10 14:34:03,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 507 transitions, 29910 flow. Second operand has 3 states, 3 states have (on average 506.6666666666667) internal successors, (1520), 3 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:03,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:03,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 506 of 509 [2021-06-10 14:34:03,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:03,972 INFO L129 PetriNetUnfolder]: 0/506 cut-off events. [2021-06-10 14:34:03,972 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:03,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15209 conditions, 506 events. 0/506 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1023 event pairs, 0 based on Foata normal form. 169/675 useless extension candidates. Maximal degree in co-relation 0. Up to 169 conditions per place. [2021-06-10 14:34:03,973 INFO L132 encePairwiseOnDemand]: 507/509 looper letters, 0 selfloop transitions, 1 changer transitions 0/506 dead transitions. [2021-06-10 14:34:03,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 845 places, 506 transitions, 29910 flow [2021-06-10 14:34:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1520 transitions. [2021-06-10 14:34:03,974 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9954158480681073 [2021-06-10 14:34:03,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1520 transitions. [2021-06-10 14:34:03,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1520 transitions. [2021-06-10 14:34:03,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:03,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1520 transitions. [2021-06-10 14:34:03,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 506.6666666666667) internal successors, (1520), 3 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:03,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 509.0) internal successors, (2036), 4 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:03,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 509.0) internal successors, (2036), 4 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:03,976 INFO L185 Difference]: Start difference. First operand has 844 places, 507 transitions, 29910 flow. Second operand 3 states and 1520 transitions. [2021-06-10 14:34:03,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 845 places, 506 transitions, 29910 flow [2021-06-10 14:34:05,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 845 places, 506 transitions, 1854 flow, removed 14028 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:05,416 INFO L241 Difference]: Finished difference. Result has 845 places, 506 transitions, 1854 flow [2021-06-10 14:34:05,416 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=1852, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1854, PETRI_PLACES=845, PETRI_TRANSITIONS=506} [2021-06-10 14:34:05,416 INFO L343 CegarLoopForPetriNet]: 844 programPoint places, 1 predicate places. [2021-06-10 14:34:05,416 INFO L480 AbstractCegarLoop]: Abstraction has has 845 places, 506 transitions, 1854 flow [2021-06-10 14:34:05,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 506.6666666666667) internal successors, (1520), 3 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:05,416 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:05,416 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:05,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334 [2021-06-10 14:34:05,416 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:05,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:05,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1050637476, now seen corresponding path program 1 times [2021-06-10 14:34:05,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:05,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686349018] [2021-06-10 14:34:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:05,495 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:05,498 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:05,555 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:05,555 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:05,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335 [2021-06-10 14:34:05,555 WARN L342 ceAbstractionStarter]: 168 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:05,555 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 169 thread instances. [2021-06-10 14:34:05,807 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:05,808 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:05,808 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:05,808 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:05,808 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:05,808 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:05,808 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:05,808 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:05,808 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:05,808 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:05,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 851 places, 512 transitions, 30261 flow [2021-06-10 14:34:06,683 INFO L129 PetriNetUnfolder]: 0/1019 cut-off events. [2021-06-10 14:34:06,683 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:06,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15892 conditions, 1019 events. 0/1019 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4002 event pairs, 0 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 0. Up to 170 conditions per place. [2021-06-10 14:34:06,683 INFO L82 GeneralOperation]: Start removeDead. Operand has 851 places, 512 transitions, 30261 flow [2021-06-10 14:34:06,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 849 places, 510 transitions, 30257 flow [2021-06-10 14:34:06,702 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:34:06,702 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:06,702 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:06,702 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:06,702 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:06,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:06,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1407139, now seen corresponding path program 1 times [2021-06-10 14:34:06,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:06,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264692343] [2021-06-10 14:34:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:06,779 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:06,779 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:06,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264692343] [2021-06-10 14:34:06,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:06,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:06,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085640279] [2021-06-10 14:34:06,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:06,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:06,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:06,782 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 509 out of 512 [2021-06-10 14:34:06,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 849 places, 510 transitions, 30257 flow. Second operand has 3 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:06,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:06,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 509 of 512 [2021-06-10 14:34:06,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:07,508 INFO L129 PetriNetUnfolder]: 0/509 cut-off events. [2021-06-10 14:34:07,508 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:07,508 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15384 conditions, 509 events. 0/509 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 978 event pairs, 0 based on Foata normal form. 170/679 useless extension candidates. Maximal degree in co-relation 0. Up to 170 conditions per place. [2021-06-10 14:34:07,510 INFO L132 encePairwiseOnDemand]: 510/512 looper letters, 0 selfloop transitions, 1 changer transitions 0/509 dead transitions. [2021-06-10 14:34:07,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 509 transitions, 30257 flow [2021-06-10 14:34:07,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:07,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1529 transitions. [2021-06-10 14:34:07,511 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9954427083333334 [2021-06-10 14:34:07,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1529 transitions. [2021-06-10 14:34:07,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1529 transitions. [2021-06-10 14:34:07,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:07,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1529 transitions. [2021-06-10 14:34:07,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:07,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 512.0) internal successors, (2048), 4 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:07,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 512.0) internal successors, (2048), 4 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:07,513 INFO L185 Difference]: Start difference. First operand has 849 places, 510 transitions, 30257 flow. Second operand 3 states and 1529 transitions. [2021-06-10 14:34:07,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 509 transitions, 30257 flow [2021-06-10 14:34:09,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 850 places, 509 transitions, 1865 flow, removed 14196 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:09,120 INFO L241 Difference]: Finished difference. Result has 850 places, 509 transitions, 1865 flow [2021-06-10 14:34:09,121 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=512, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=848, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1865, PETRI_PLACES=850, PETRI_TRANSITIONS=509} [2021-06-10 14:34:09,121 INFO L343 CegarLoopForPetriNet]: 849 programPoint places, 1 predicate places. [2021-06-10 14:34:09,121 INFO L480 AbstractCegarLoop]: Abstraction has has 850 places, 509 transitions, 1865 flow [2021-06-10 14:34:09,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:09,121 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:09,121 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:09,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336 [2021-06-10 14:34:09,121 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:09,121 INFO L82 PathProgramCache]: Analyzing trace with hash 727553681, now seen corresponding path program 1 times [2021-06-10 14:34:09,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:09,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815960883] [2021-06-10 14:34:09,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:09,196 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:09,198 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:09,255 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:09,256 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:09,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337 [2021-06-10 14:34:09,256 WARN L342 ceAbstractionStarter]: 169 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:09,256 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 170 thread instances. [2021-06-10 14:34:09,494 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:09,494 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:09,494 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:09,494 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:09,494 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:09,494 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:09,494 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:09,494 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:09,494 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:09,494 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:09,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 856 places, 515 transitions, 30610 flow [2021-06-10 14:34:10,316 INFO L129 PetriNetUnfolder]: 0/1025 cut-off events. [2021-06-10 14:34:10,316 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:10,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16071 conditions, 1025 events. 0/1025 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4089 event pairs, 0 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 0. Up to 171 conditions per place. [2021-06-10 14:34:10,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 856 places, 515 transitions, 30610 flow [2021-06-10 14:34:10,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 854 places, 513 transitions, 30606 flow [2021-06-10 14:34:10,327 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:34:10,328 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:10,328 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:10,328 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:10,328 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:10,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1423619, now seen corresponding path program 1 times [2021-06-10 14:34:10,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:10,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982625492] [2021-06-10 14:34:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:10,425 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:10,425 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:10,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982625492] [2021-06-10 14:34:10,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:10,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:10,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533173480] [2021-06-10 14:34:10,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:10,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:10,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:10,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:10,429 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 512 out of 515 [2021-06-10 14:34:10,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 854 places, 513 transitions, 30606 flow. Second operand has 3 states, 3 states have (on average 512.6666666666666) internal successors, (1538), 3 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:10,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:10,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 512 of 515 [2021-06-10 14:34:10,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:11,034 INFO L129 PetriNetUnfolder]: 0/512 cut-off events. [2021-06-10 14:34:11,034 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:11,034 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15560 conditions, 512 events. 0/512 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 889 event pairs, 0 based on Foata normal form. 171/683 useless extension candidates. Maximal degree in co-relation 0. Up to 171 conditions per place. [2021-06-10 14:34:11,035 INFO L132 encePairwiseOnDemand]: 513/515 looper letters, 0 selfloop transitions, 1 changer transitions 0/512 dead transitions. [2021-06-10 14:34:11,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 855 places, 512 transitions, 30606 flow [2021-06-10 14:34:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1538 transitions. [2021-06-10 14:34:11,037 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9954692556634305 [2021-06-10 14:34:11,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1538 transitions. [2021-06-10 14:34:11,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1538 transitions. [2021-06-10 14:34:11,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:11,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1538 transitions. [2021-06-10 14:34:11,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 512.6666666666666) internal successors, (1538), 3 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:11,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:11,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:11,039 INFO L185 Difference]: Start difference. First operand has 854 places, 513 transitions, 30606 flow. Second operand 3 states and 1538 transitions. [2021-06-10 14:34:11,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 855 places, 512 transitions, 30606 flow [2021-06-10 14:34:12,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 855 places, 512 transitions, 1876 flow, removed 14365 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:12,978 INFO L241 Difference]: Finished difference. Result has 855 places, 512 transitions, 1876 flow [2021-06-10 14:34:12,979 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1876, PETRI_PLACES=855, PETRI_TRANSITIONS=512} [2021-06-10 14:34:12,979 INFO L343 CegarLoopForPetriNet]: 854 programPoint places, 1 predicate places. [2021-06-10 14:34:12,979 INFO L480 AbstractCegarLoop]: Abstraction has has 855 places, 512 transitions, 1876 flow [2021-06-10 14:34:12,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 512.6666666666666) internal successors, (1538), 3 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:12,979 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:12,979 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:12,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338 [2021-06-10 14:34:12,979 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:12,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2027214809, now seen corresponding path program 1 times [2021-06-10 14:34:12,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:12,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524868009] [2021-06-10 14:34:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:13,053 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:13,055 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:13,112 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:13,112 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:13,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339 [2021-06-10 14:34:13,112 WARN L342 ceAbstractionStarter]: 170 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:13,113 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 171 thread instances. [2021-06-10 14:34:13,253 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:13,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:13,254 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:13,254 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:13,254 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:13,254 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:13,254 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:13,254 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:13,254 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:13,254 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:13,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 861 places, 518 transitions, 30961 flow [2021-06-10 14:34:14,060 INFO L129 PetriNetUnfolder]: 0/1031 cut-off events. [2021-06-10 14:34:14,060 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:14,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16251 conditions, 1031 events. 0/1031 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4034 event pairs, 0 based on Foata normal form. 0/859 useless extension candidates. Maximal degree in co-relation 0. Up to 172 conditions per place. [2021-06-10 14:34:14,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 861 places, 518 transitions, 30961 flow [2021-06-10 14:34:14,070 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 859 places, 516 transitions, 30957 flow [2021-06-10 14:34:14,070 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:34:14,071 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:14,071 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:14,071 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:14,071 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:14,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:14,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1440195, now seen corresponding path program 1 times [2021-06-10 14:34:14,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:14,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927478570] [2021-06-10 14:34:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:14,145 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:14,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:14,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927478570] [2021-06-10 14:34:14,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:14,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:14,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950964332] [2021-06-10 14:34:14,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:14,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:14,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:14,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:14,148 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 515 out of 518 [2021-06-10 14:34:14,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 859 places, 516 transitions, 30957 flow. Second operand has 3 states, 3 states have (on average 515.6666666666666) internal successors, (1547), 3 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:14,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:14,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 515 of 518 [2021-06-10 14:34:14,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:14,759 INFO L129 PetriNetUnfolder]: 0/515 cut-off events. [2021-06-10 14:34:14,759 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:14,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15737 conditions, 515 events. 0/515 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1028 event pairs, 0 based on Foata normal form. 172/687 useless extension candidates. Maximal degree in co-relation 0. Up to 172 conditions per place. [2021-06-10 14:34:14,761 INFO L132 encePairwiseOnDemand]: 516/518 looper letters, 0 selfloop transitions, 1 changer transitions 0/515 dead transitions. [2021-06-10 14:34:14,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 515 transitions, 30957 flow [2021-06-10 14:34:14,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1547 transitions. [2021-06-10 14:34:14,762 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9954954954954955 [2021-06-10 14:34:14,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1547 transitions. [2021-06-10 14:34:14,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1547 transitions. [2021-06-10 14:34:14,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:14,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1547 transitions. [2021-06-10 14:34:14,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 515.6666666666666) internal successors, (1547), 3 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:14,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 518.0) internal successors, (2072), 4 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:14,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 518.0) internal successors, (2072), 4 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:14,764 INFO L185 Difference]: Start difference. First operand has 859 places, 516 transitions, 30957 flow. Second operand 3 states and 1547 transitions. [2021-06-10 14:34:14,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 860 places, 515 transitions, 30957 flow [2021-06-10 14:34:16,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 860 places, 515 transitions, 1887 flow, removed 14535 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:16,676 INFO L241 Difference]: Finished difference. Result has 860 places, 515 transitions, 1887 flow [2021-06-10 14:34:16,676 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=518, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=858, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1887, PETRI_PLACES=860, PETRI_TRANSITIONS=515} [2021-06-10 14:34:16,676 INFO L343 CegarLoopForPetriNet]: 859 programPoint places, 1 predicate places. [2021-06-10 14:34:16,676 INFO L480 AbstractCegarLoop]: Abstraction has has 860 places, 515 transitions, 1887 flow [2021-06-10 14:34:16,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 515.6666666666666) internal successors, (1547), 3 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:16,677 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:16,677 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:16,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340 [2021-06-10 14:34:16,677 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:16,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1012787065, now seen corresponding path program 1 times [2021-06-10 14:34:16,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:16,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848356134] [2021-06-10 14:34:16,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:16,777 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:16,779 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:16,842 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:16,843 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:16,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341 [2021-06-10 14:34:16,843 WARN L342 ceAbstractionStarter]: 171 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:16,843 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 172 thread instances. [2021-06-10 14:34:16,982 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:16,982 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:16,982 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:16,982 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:16,982 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:16,982 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:16,982 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:16,983 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:16,983 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:16,983 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:16,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 866 places, 521 transitions, 31314 flow [2021-06-10 14:34:17,921 INFO L129 PetriNetUnfolder]: 0/1037 cut-off events. [2021-06-10 14:34:17,921 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:17,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16432 conditions, 1037 events. 0/1037 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4023 event pairs, 0 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 0. Up to 173 conditions per place. [2021-06-10 14:34:17,922 INFO L82 GeneralOperation]: Start removeDead. Operand has 866 places, 521 transitions, 31314 flow [2021-06-10 14:34:17,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 864 places, 519 transitions, 31310 flow [2021-06-10 14:34:17,932 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:34:17,932 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:17,932 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:17,932 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:17,932 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:17,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1456867, now seen corresponding path program 1 times [2021-06-10 14:34:17,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:17,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648296345] [2021-06-10 14:34:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:18,010 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:18,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:18,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648296345] [2021-06-10 14:34:18,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:18,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:18,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617275974] [2021-06-10 14:34:18,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:18,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:18,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:18,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:18,013 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 518 out of 521 [2021-06-10 14:34:18,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 864 places, 519 transitions, 31310 flow. Second operand has 3 states, 3 states have (on average 518.6666666666666) internal successors, (1556), 3 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:18,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:18,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 518 of 521 [2021-06-10 14:34:18,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:18,777 INFO L129 PetriNetUnfolder]: 0/518 cut-off events. [2021-06-10 14:34:18,777 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:18,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15915 conditions, 518 events. 0/518 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 960 event pairs, 0 based on Foata normal form. 173/691 useless extension candidates. Maximal degree in co-relation 0. Up to 173 conditions per place. [2021-06-10 14:34:18,779 INFO L132 encePairwiseOnDemand]: 519/521 looper letters, 0 selfloop transitions, 1 changer transitions 0/518 dead transitions. [2021-06-10 14:34:18,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 865 places, 518 transitions, 31310 flow [2021-06-10 14:34:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1556 transitions. [2021-06-10 14:34:18,780 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9955214331413947 [2021-06-10 14:34:18,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1556 transitions. [2021-06-10 14:34:18,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1556 transitions. [2021-06-10 14:34:18,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:18,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1556 transitions. [2021-06-10 14:34:18,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 518.6666666666666) internal successors, (1556), 3 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:18,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 521.0) internal successors, (2084), 4 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:18,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 521.0) internal successors, (2084), 4 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:18,782 INFO L185 Difference]: Start difference. First operand has 864 places, 519 transitions, 31310 flow. Second operand 3 states and 1556 transitions. [2021-06-10 14:34:18,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 865 places, 518 transitions, 31310 flow [2021-06-10 14:34:20,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 865 places, 518 transitions, 1898 flow, removed 14706 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:20,584 INFO L241 Difference]: Finished difference. Result has 865 places, 518 transitions, 1898 flow [2021-06-10 14:34:20,584 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=521, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=863, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1898, PETRI_PLACES=865, PETRI_TRANSITIONS=518} [2021-06-10 14:34:20,584 INFO L343 CegarLoopForPetriNet]: 864 programPoint places, 1 predicate places. [2021-06-10 14:34:20,584 INFO L480 AbstractCegarLoop]: Abstraction has has 865 places, 518 transitions, 1898 flow [2021-06-10 14:34:20,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 518.6666666666666) internal successors, (1556), 3 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:20,584 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:20,584 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:20,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342 [2021-06-10 14:34:20,584 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:20,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:20,585 INFO L82 PathProgramCache]: Analyzing trace with hash 901009898, now seen corresponding path program 1 times [2021-06-10 14:34:20,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:20,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993861536] [2021-06-10 14:34:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:20,658 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:20,661 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:20,719 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:20,719 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:20,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343 [2021-06-10 14:34:20,719 WARN L342 ceAbstractionStarter]: 172 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:20,719 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 173 thread instances. [2021-06-10 14:34:20,843 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:20,843 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:20,843 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:20,843 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:20,843 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:20,843 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:20,843 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:20,843 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:20,843 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:20,843 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:20,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 871 places, 524 transitions, 31669 flow [2021-06-10 14:34:21,628 INFO L129 PetriNetUnfolder]: 0/1043 cut-off events. [2021-06-10 14:34:21,628 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:21,628 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16614 conditions, 1043 events. 0/1043 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4042 event pairs, 0 based on Foata normal form. 0/869 useless extension candidates. Maximal degree in co-relation 0. Up to 174 conditions per place. [2021-06-10 14:34:21,628 INFO L82 GeneralOperation]: Start removeDead. Operand has 871 places, 524 transitions, 31669 flow [2021-06-10 14:34:21,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 869 places, 522 transitions, 31665 flow [2021-06-10 14:34:21,638 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:34:21,638 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:21,638 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:21,638 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:21,638 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:21,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1473635, now seen corresponding path program 1 times [2021-06-10 14:34:21,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:21,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935441938] [2021-06-10 14:34:21,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:21,718 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:21,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:21,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935441938] [2021-06-10 14:34:21,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:21,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:21,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089372017] [2021-06-10 14:34:21,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:21,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:21,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:21,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:21,721 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 521 out of 524 [2021-06-10 14:34:21,721 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 869 places, 522 transitions, 31665 flow. Second operand has 3 states, 3 states have (on average 521.6666666666666) internal successors, (1565), 3 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:21,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:21,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 521 of 524 [2021-06-10 14:34:21,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:22,383 INFO L129 PetriNetUnfolder]: 0/521 cut-off events. [2021-06-10 14:34:22,384 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:22,384 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16094 conditions, 521 events. 0/521 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1017 event pairs, 0 based on Foata normal form. 174/695 useless extension candidates. Maximal degree in co-relation 0. Up to 174 conditions per place. [2021-06-10 14:34:22,385 INFO L132 encePairwiseOnDemand]: 522/524 looper letters, 0 selfloop transitions, 1 changer transitions 0/521 dead transitions. [2021-06-10 14:34:22,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 870 places, 521 transitions, 31665 flow [2021-06-10 14:34:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1565 transitions. [2021-06-10 14:34:22,386 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9955470737913485 [2021-06-10 14:34:22,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1565 transitions. [2021-06-10 14:34:22,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1565 transitions. [2021-06-10 14:34:22,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:22,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1565 transitions. [2021-06-10 14:34:22,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 521.6666666666666) internal successors, (1565), 3 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:22,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 524.0) internal successors, (2096), 4 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:22,388 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 524.0) internal successors, (2096), 4 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:22,388 INFO L185 Difference]: Start difference. First operand has 869 places, 522 transitions, 31665 flow. Second operand 3 states and 1565 transitions. [2021-06-10 14:34:22,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 870 places, 521 transitions, 31665 flow [2021-06-10 14:34:24,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 521 transitions, 1909 flow, removed 14878 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:24,437 INFO L241 Difference]: Finished difference. Result has 870 places, 521 transitions, 1909 flow [2021-06-10 14:34:24,437 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=524, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=868, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1909, PETRI_PLACES=870, PETRI_TRANSITIONS=521} [2021-06-10 14:34:24,437 INFO L343 CegarLoopForPetriNet]: 869 programPoint places, 1 predicate places. [2021-06-10 14:34:24,437 INFO L480 AbstractCegarLoop]: Abstraction has has 870 places, 521 transitions, 1909 flow [2021-06-10 14:34:24,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 521.6666666666666) internal successors, (1565), 3 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:24,438 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:24,438 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:24,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2021-06-10 14:34:24,438 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:24,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1726015661, now seen corresponding path program 1 times [2021-06-10 14:34:24,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:24,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106641900] [2021-06-10 14:34:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:24,544 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:24,546 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:24,606 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:24,607 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:24,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable345 [2021-06-10 14:34:24,607 WARN L342 ceAbstractionStarter]: 173 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:24,607 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 174 thread instances. [2021-06-10 14:34:24,735 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:24,735 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:24,735 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:24,735 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:24,736 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:24,736 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:24,736 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:24,736 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:24,736 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:24,736 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:24,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 876 places, 527 transitions, 32026 flow [2021-06-10 14:34:25,440 INFO L129 PetriNetUnfolder]: 0/1049 cut-off events. [2021-06-10 14:34:25,440 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:25,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16797 conditions, 1049 events. 0/1049 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4043 event pairs, 0 based on Foata normal form. 0/874 useless extension candidates. Maximal degree in co-relation 0. Up to 175 conditions per place. [2021-06-10 14:34:25,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 876 places, 527 transitions, 32026 flow [2021-06-10 14:34:25,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 874 places, 525 transitions, 32022 flow [2021-06-10 14:34:25,451 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:34:25,451 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:25,451 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:25,451 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:25,451 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:25,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:25,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1490499, now seen corresponding path program 1 times [2021-06-10 14:34:25,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:25,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139479012] [2021-06-10 14:34:25,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:25,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:25,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:25,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139479012] [2021-06-10 14:34:25,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:25,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:25,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816874421] [2021-06-10 14:34:25,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:25,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:25,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:25,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:25,581 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 524 out of 527 [2021-06-10 14:34:25,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 874 places, 525 transitions, 32022 flow. Second operand has 3 states, 3 states have (on average 524.6666666666666) internal successors, (1574), 3 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:25,581 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:25,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 524 of 527 [2021-06-10 14:34:25,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:26,115 INFO L129 PetriNetUnfolder]: 0/524 cut-off events. [2021-06-10 14:34:26,115 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:26,115 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16274 conditions, 524 events. 0/524 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 956 event pairs, 0 based on Foata normal form. 175/699 useless extension candidates. Maximal degree in co-relation 0. Up to 175 conditions per place. [2021-06-10 14:34:26,116 INFO L132 encePairwiseOnDemand]: 525/527 looper letters, 0 selfloop transitions, 1 changer transitions 0/524 dead transitions. [2021-06-10 14:34:26,116 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 875 places, 524 transitions, 32022 flow [2021-06-10 14:34:26,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1574 transitions. [2021-06-10 14:34:26,117 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9955724225173941 [2021-06-10 14:34:26,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1574 transitions. [2021-06-10 14:34:26,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1574 transitions. [2021-06-10 14:34:26,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:26,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1574 transitions. [2021-06-10 14:34:26,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 524.6666666666666) internal successors, (1574), 3 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:26,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 527.0) internal successors, (2108), 4 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:26,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 527.0) internal successors, (2108), 4 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:26,119 INFO L185 Difference]: Start difference. First operand has 874 places, 525 transitions, 32022 flow. Second operand 3 states and 1574 transitions. [2021-06-10 14:34:26,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 875 places, 524 transitions, 32022 flow [2021-06-10 14:34:28,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 875 places, 524 transitions, 1920 flow, removed 15051 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:28,280 INFO L241 Difference]: Finished difference. Result has 875 places, 524 transitions, 1920 flow [2021-06-10 14:34:28,280 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=873, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1920, PETRI_PLACES=875, PETRI_TRANSITIONS=524} [2021-06-10 14:34:28,280 INFO L343 CegarLoopForPetriNet]: 874 programPoint places, 1 predicate places. [2021-06-10 14:34:28,280 INFO L480 AbstractCegarLoop]: Abstraction has has 875 places, 524 transitions, 1920 flow [2021-06-10 14:34:28,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 524.6666666666666) internal successors, (1574), 3 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:28,280 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:28,280 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:28,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346 [2021-06-10 14:34:28,281 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:28,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2005881235, now seen corresponding path program 1 times [2021-06-10 14:34:28,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:28,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004790198] [2021-06-10 14:34:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:28,359 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:28,362 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:28,422 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:28,422 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:28,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347 [2021-06-10 14:34:28,422 WARN L342 ceAbstractionStarter]: 174 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:28,422 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 175 thread instances. [2021-06-10 14:34:28,551 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:28,552 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:28,552 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:28,552 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:28,552 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:28,552 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:28,552 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:28,552 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:28,552 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:28,552 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:28,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 881 places, 530 transitions, 32385 flow [2021-06-10 14:34:29,451 INFO L129 PetriNetUnfolder]: 0/1055 cut-off events. [2021-06-10 14:34:29,452 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:29,452 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16981 conditions, 1055 events. 0/1055 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4099 event pairs, 0 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 0. Up to 176 conditions per place. [2021-06-10 14:34:29,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 881 places, 530 transitions, 32385 flow [2021-06-10 14:34:29,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 879 places, 528 transitions, 32381 flow [2021-06-10 14:34:29,462 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:34:29,462 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:29,462 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:29,462 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:29,462 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:29,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1507459, now seen corresponding path program 1 times [2021-06-10 14:34:29,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:29,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222773782] [2021-06-10 14:34:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:29,541 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:29,541 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:29,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222773782] [2021-06-10 14:34:29,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:29,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:29,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494875473] [2021-06-10 14:34:29,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:29,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:29,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:29,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:29,544 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 527 out of 530 [2021-06-10 14:34:29,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 879 places, 528 transitions, 32381 flow. Second operand has 3 states, 3 states have (on average 527.6666666666666) internal successors, (1583), 3 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:29,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:29,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 527 of 530 [2021-06-10 14:34:29,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:30,326 INFO L129 PetriNetUnfolder]: 0/527 cut-off events. [2021-06-10 14:34:30,326 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:30,326 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16455 conditions, 527 events. 0/527 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1034 event pairs, 0 based on Foata normal form. 176/703 useless extension candidates. Maximal degree in co-relation 0. Up to 176 conditions per place. [2021-06-10 14:34:30,327 INFO L132 encePairwiseOnDemand]: 528/530 looper letters, 0 selfloop transitions, 1 changer transitions 0/527 dead transitions. [2021-06-10 14:34:30,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 527 transitions, 32381 flow [2021-06-10 14:34:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1583 transitions. [2021-06-10 14:34:30,328 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9955974842767296 [2021-06-10 14:34:30,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1583 transitions. [2021-06-10 14:34:30,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1583 transitions. [2021-06-10 14:34:30,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:30,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1583 transitions. [2021-06-10 14:34:30,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 527.6666666666666) internal successors, (1583), 3 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:30,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:30,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:30,330 INFO L185 Difference]: Start difference. First operand has 879 places, 528 transitions, 32381 flow. Second operand 3 states and 1583 transitions. [2021-06-10 14:34:30,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 527 transitions, 32381 flow [2021-06-10 14:34:32,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 880 places, 527 transitions, 1931 flow, removed 15225 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:32,465 INFO L241 Difference]: Finished difference. Result has 880 places, 527 transitions, 1931 flow [2021-06-10 14:34:32,465 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=1929, PETRI_DIFFERENCE_MINUEND_PLACES=878, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1931, PETRI_PLACES=880, PETRI_TRANSITIONS=527} [2021-06-10 14:34:32,465 INFO L343 CegarLoopForPetriNet]: 879 programPoint places, 1 predicate places. [2021-06-10 14:34:32,465 INFO L480 AbstractCegarLoop]: Abstraction has has 880 places, 527 transitions, 1931 flow [2021-06-10 14:34:32,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 527.6666666666666) internal successors, (1583), 3 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:32,465 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:32,465 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:32,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348 [2021-06-10 14:34:32,465 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:32,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1613103699, now seen corresponding path program 1 times [2021-06-10 14:34:32,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:32,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104294466] [2021-06-10 14:34:32,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:32,552 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:32,555 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:32,616 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:32,617 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:32,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349 [2021-06-10 14:34:32,617 WARN L342 ceAbstractionStarter]: 175 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:32,617 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 176 thread instances. [2021-06-10 14:34:32,745 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:32,745 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:32,746 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:32,746 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:32,746 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:32,746 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:32,746 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:32,746 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:32,746 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:32,746 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:32,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 886 places, 533 transitions, 32746 flow [2021-06-10 14:34:33,573 INFO L129 PetriNetUnfolder]: 0/1061 cut-off events. [2021-06-10 14:34:33,573 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:33,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17166 conditions, 1061 events. 0/1061 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4139 event pairs, 0 based on Foata normal form. 0/884 useless extension candidates. Maximal degree in co-relation 0. Up to 177 conditions per place. [2021-06-10 14:34:33,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 886 places, 533 transitions, 32746 flow [2021-06-10 14:34:33,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 884 places, 531 transitions, 32742 flow [2021-06-10 14:34:33,585 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:34:33,585 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:33,585 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:33,585 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:33,585 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1524515, now seen corresponding path program 1 times [2021-06-10 14:34:33,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:33,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398812482] [2021-06-10 14:34:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:33,661 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:33,661 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:33,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398812482] [2021-06-10 14:34:33,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:33,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:33,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526545063] [2021-06-10 14:34:33,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:33,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:33,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:33,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:33,664 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 530 out of 533 [2021-06-10 14:34:33,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 884 places, 531 transitions, 32742 flow. Second operand has 3 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:33,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:33,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 530 of 533 [2021-06-10 14:34:33,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:34,272 INFO L129 PetriNetUnfolder]: 0/530 cut-off events. [2021-06-10 14:34:34,273 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:34,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16637 conditions, 530 events. 0/530 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 911 event pairs, 0 based on Foata normal form. 177/707 useless extension candidates. Maximal degree in co-relation 0. Up to 177 conditions per place. [2021-06-10 14:34:34,274 INFO L132 encePairwiseOnDemand]: 531/533 looper letters, 0 selfloop transitions, 1 changer transitions 0/530 dead transitions. [2021-06-10 14:34:34,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 885 places, 530 transitions, 32742 flow [2021-06-10 14:34:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:34,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1592 transitions. [2021-06-10 14:34:34,275 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9956222639149468 [2021-06-10 14:34:34,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1592 transitions. [2021-06-10 14:34:34,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1592 transitions. [2021-06-10 14:34:34,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:34,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1592 transitions. [2021-06-10 14:34:34,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:34,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:34,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:34,277 INFO L185 Difference]: Start difference. First operand has 884 places, 531 transitions, 32742 flow. Second operand 3 states and 1592 transitions. [2021-06-10 14:34:34,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 885 places, 530 transitions, 32742 flow [2021-06-10 14:34:36,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 885 places, 530 transitions, 1942 flow, removed 15400 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:36,581 INFO L241 Difference]: Finished difference. Result has 885 places, 530 transitions, 1942 flow [2021-06-10 14:34:36,582 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=883, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1942, PETRI_PLACES=885, PETRI_TRANSITIONS=530} [2021-06-10 14:34:36,582 INFO L343 CegarLoopForPetriNet]: 884 programPoint places, 1 predicate places. [2021-06-10 14:34:36,582 INFO L480 AbstractCegarLoop]: Abstraction has has 885 places, 530 transitions, 1942 flow [2021-06-10 14:34:36,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:36,582 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:36,582 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:36,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350 [2021-06-10 14:34:36,582 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:36,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1629504976, now seen corresponding path program 1 times [2021-06-10 14:34:36,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:36,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796753535] [2021-06-10 14:34:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:36,659 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:36,662 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:36,723 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:36,723 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:36,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351 [2021-06-10 14:34:36,723 WARN L342 ceAbstractionStarter]: 176 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:36,723 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 177 thread instances. [2021-06-10 14:34:36,851 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:36,851 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:36,852 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:36,852 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:36,852 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:36,852 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:36,852 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:36,852 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:36,852 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:36,852 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:36,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 891 places, 536 transitions, 33109 flow [2021-06-10 14:34:37,789 INFO L129 PetriNetUnfolder]: 0/1067 cut-off events. [2021-06-10 14:34:37,789 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:37,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17352 conditions, 1067 events. 0/1067 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4139 event pairs, 0 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 0. Up to 178 conditions per place. [2021-06-10 14:34:37,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 891 places, 536 transitions, 33109 flow [2021-06-10 14:34:37,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 889 places, 534 transitions, 33105 flow [2021-06-10 14:34:37,800 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:34:37,800 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:37,800 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:37,800 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:37,800 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:37,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1541667, now seen corresponding path program 1 times [2021-06-10 14:34:37,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:37,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312882859] [2021-06-10 14:34:37,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:37,876 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:37,876 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:37,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312882859] [2021-06-10 14:34:37,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:37,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:37,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093457488] [2021-06-10 14:34:37,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:37,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:37,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:37,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:37,879 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 533 out of 536 [2021-06-10 14:34:37,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 889 places, 534 transitions, 33105 flow. Second operand has 3 states, 3 states have (on average 533.6666666666666) internal successors, (1601), 3 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:37,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:37,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 533 of 536 [2021-06-10 14:34:37,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:38,776 INFO L129 PetriNetUnfolder]: 0/533 cut-off events. [2021-06-10 14:34:38,776 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:38,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16820 conditions, 533 events. 0/533 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1070 event pairs, 0 based on Foata normal form. 178/711 useless extension candidates. Maximal degree in co-relation 0. Up to 178 conditions per place. [2021-06-10 14:34:38,778 INFO L132 encePairwiseOnDemand]: 534/536 looper letters, 0 selfloop transitions, 1 changer transitions 0/533 dead transitions. [2021-06-10 14:34:38,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 890 places, 533 transitions, 33105 flow [2021-06-10 14:34:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:38,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1601 transitions. [2021-06-10 14:34:38,779 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9956467661691543 [2021-06-10 14:34:38,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1601 transitions. [2021-06-10 14:34:38,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1601 transitions. [2021-06-10 14:34:38,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:38,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1601 transitions. [2021-06-10 14:34:38,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 533.6666666666666) internal successors, (1601), 3 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:38,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:38,781 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:38,781 INFO L185 Difference]: Start difference. First operand has 889 places, 534 transitions, 33105 flow. Second operand 3 states and 1601 transitions. [2021-06-10 14:34:38,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 890 places, 533 transitions, 33105 flow [2021-06-10 14:34:41,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 890 places, 533 transitions, 1953 flow, removed 15576 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:41,095 INFO L241 Difference]: Finished difference. Result has 890 places, 533 transitions, 1953 flow [2021-06-10 14:34:41,095 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=888, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1953, PETRI_PLACES=890, PETRI_TRANSITIONS=533} [2021-06-10 14:34:41,095 INFO L343 CegarLoopForPetriNet]: 889 programPoint places, 1 predicate places. [2021-06-10 14:34:41,095 INFO L480 AbstractCegarLoop]: Abstraction has has 890 places, 533 transitions, 1953 flow [2021-06-10 14:34:41,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 533.6666666666666) internal successors, (1601), 3 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:41,096 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:41,096 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:41,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352 [2021-06-10 14:34:41,096 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:41,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:41,096 INFO L82 PathProgramCache]: Analyzing trace with hash 922405369, now seen corresponding path program 1 times [2021-06-10 14:34:41,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:41,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319550279] [2021-06-10 14:34:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:41,188 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:41,191 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:41,256 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:41,256 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:41,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353 [2021-06-10 14:34:41,256 WARN L342 ceAbstractionStarter]: 177 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:41,256 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 178 thread instances. [2021-06-10 14:34:41,397 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:41,397 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:41,397 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:41,397 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:41,397 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:41,397 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:41,397 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:41,397 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:41,397 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:41,397 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:41,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 896 places, 539 transitions, 33474 flow [2021-06-10 14:34:42,290 INFO L129 PetriNetUnfolder]: 0/1073 cut-off events. [2021-06-10 14:34:42,290 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:42,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17539 conditions, 1073 events. 0/1073 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4153 event pairs, 0 based on Foata normal form. 0/894 useless extension candidates. Maximal degree in co-relation 0. Up to 179 conditions per place. [2021-06-10 14:34:42,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 896 places, 539 transitions, 33474 flow [2021-06-10 14:34:42,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 894 places, 537 transitions, 33470 flow [2021-06-10 14:34:42,301 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:34:42,301 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:42,301 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:42,301 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:42,301 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:42,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:42,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1558915, now seen corresponding path program 1 times [2021-06-10 14:34:42,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:42,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919968987] [2021-06-10 14:34:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:42,378 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:42,378 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:42,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919968987] [2021-06-10 14:34:42,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:42,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:42,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710919457] [2021-06-10 14:34:42,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:42,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:42,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:42,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:42,381 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 536 out of 539 [2021-06-10 14:34:42,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 894 places, 537 transitions, 33470 flow. Second operand has 3 states, 3 states have (on average 536.6666666666666) internal successors, (1610), 3 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:42,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:42,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 536 of 539 [2021-06-10 14:34:42,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:43,029 INFO L129 PetriNetUnfolder]: 0/536 cut-off events. [2021-06-10 14:34:43,030 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:43,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17004 conditions, 536 events. 0/536 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 921 event pairs, 0 based on Foata normal form. 179/715 useless extension candidates. Maximal degree in co-relation 0. Up to 179 conditions per place. [2021-06-10 14:34:43,031 INFO L132 encePairwiseOnDemand]: 537/539 looper letters, 0 selfloop transitions, 1 changer transitions 0/536 dead transitions. [2021-06-10 14:34:43,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 895 places, 536 transitions, 33470 flow [2021-06-10 14:34:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:43,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:43,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1610 transitions. [2021-06-10 14:34:43,032 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9956709956709957 [2021-06-10 14:34:43,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1610 transitions. [2021-06-10 14:34:43,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1610 transitions. [2021-06-10 14:34:43,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:43,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1610 transitions. [2021-06-10 14:34:43,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 536.6666666666666) internal successors, (1610), 3 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:43,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:43,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:43,034 INFO L185 Difference]: Start difference. First operand has 894 places, 537 transitions, 33470 flow. Second operand 3 states and 1610 transitions. [2021-06-10 14:34:43,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 895 places, 536 transitions, 33470 flow [2021-06-10 14:34:45,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 895 places, 536 transitions, 1964 flow, removed 15753 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:45,456 INFO L241 Difference]: Finished difference. Result has 895 places, 536 transitions, 1964 flow [2021-06-10 14:34:45,457 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=893, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1964, PETRI_PLACES=895, PETRI_TRANSITIONS=536} [2021-06-10 14:34:45,457 INFO L343 CegarLoopForPetriNet]: 894 programPoint places, 1 predicate places. [2021-06-10 14:34:45,457 INFO L480 AbstractCegarLoop]: Abstraction has has 895 places, 536 transitions, 1964 flow [2021-06-10 14:34:45,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 536.6666666666666) internal successors, (1610), 3 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:45,457 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:45,457 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:45,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354 [2021-06-10 14:34:45,457 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:45,457 INFO L82 PathProgramCache]: Analyzing trace with hash -482692685, now seen corresponding path program 1 times [2021-06-10 14:34:45,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:45,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212949151] [2021-06-10 14:34:45,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:45,541 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:45,544 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:45,606 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:45,606 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:45,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355 [2021-06-10 14:34:45,607 WARN L342 ceAbstractionStarter]: 178 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:45,607 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 179 thread instances. [2021-06-10 14:34:45,727 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:45,728 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:45,728 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:45,728 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:45,728 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:45,728 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:45,728 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:45,728 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:45,728 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:45,728 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:45,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 901 places, 542 transitions, 33841 flow [2021-06-10 14:34:46,709 INFO L129 PetriNetUnfolder]: 0/1079 cut-off events. [2021-06-10 14:34:46,709 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:46,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17727 conditions, 1079 events. 0/1079 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4199 event pairs, 0 based on Foata normal form. 0/899 useless extension candidates. Maximal degree in co-relation 0. Up to 180 conditions per place. [2021-06-10 14:34:46,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 901 places, 542 transitions, 33841 flow [2021-06-10 14:34:46,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 899 places, 540 transitions, 33837 flow [2021-06-10 14:34:46,720 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:34:46,720 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:46,720 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:46,720 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:46,720 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1576259, now seen corresponding path program 1 times [2021-06-10 14:34:46,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:46,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217722890] [2021-06-10 14:34:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:46,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:46,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:46,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217722890] [2021-06-10 14:34:46,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:46,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:46,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502817763] [2021-06-10 14:34:46,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:46,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:46,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:46,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:46,800 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 539 out of 542 [2021-06-10 14:34:46,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 899 places, 540 transitions, 33837 flow. Second operand has 3 states, 3 states have (on average 539.6666666666666) internal successors, (1619), 3 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:46,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:46,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 539 of 542 [2021-06-10 14:34:46,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:47,683 INFO L129 PetriNetUnfolder]: 0/539 cut-off events. [2021-06-10 14:34:47,683 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:47,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17189 conditions, 539 events. 0/539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1094 event pairs, 0 based on Foata normal form. 180/719 useless extension candidates. Maximal degree in co-relation 0. Up to 180 conditions per place. [2021-06-10 14:34:47,685 INFO L132 encePairwiseOnDemand]: 540/542 looper letters, 0 selfloop transitions, 1 changer transitions 0/539 dead transitions. [2021-06-10 14:34:47,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 900 places, 539 transitions, 33837 flow [2021-06-10 14:34:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1619 transitions. [2021-06-10 14:34:47,687 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9956949569495694 [2021-06-10 14:34:47,687 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1619 transitions. [2021-06-10 14:34:47,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1619 transitions. [2021-06-10 14:34:47,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:47,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1619 transitions. [2021-06-10 14:34:47,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 539.6666666666666) internal successors, (1619), 3 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:47,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:47,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:47,689 INFO L185 Difference]: Start difference. First operand has 899 places, 540 transitions, 33837 flow. Second operand 3 states and 1619 transitions. [2021-06-10 14:34:47,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 900 places, 539 transitions, 33837 flow [2021-06-10 14:34:50,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 900 places, 539 transitions, 1975 flow, removed 15931 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:50,197 INFO L241 Difference]: Finished difference. Result has 900 places, 539 transitions, 1975 flow [2021-06-10 14:34:50,197 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=898, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1975, PETRI_PLACES=900, PETRI_TRANSITIONS=539} [2021-06-10 14:34:50,197 INFO L343 CegarLoopForPetriNet]: 899 programPoint places, 1 predicate places. [2021-06-10 14:34:50,197 INFO L480 AbstractCegarLoop]: Abstraction has has 900 places, 539 transitions, 1975 flow [2021-06-10 14:34:50,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 539.6666666666666) internal successors, (1619), 3 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:50,197 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:50,197 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:50,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356 [2021-06-10 14:34:50,197 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:50,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:50,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1170001647, now seen corresponding path program 1 times [2021-06-10 14:34:50,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:50,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628384853] [2021-06-10 14:34:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:50,296 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:50,299 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:50,364 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:50,365 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:50,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357 [2021-06-10 14:34:50,365 WARN L342 ceAbstractionStarter]: 179 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:50,365 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 180 thread instances. [2021-06-10 14:34:50,495 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:50,495 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:50,495 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:50,495 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:50,496 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:50,496 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:50,496 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:50,496 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:50,496 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:50,496 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:50,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 906 places, 545 transitions, 34210 flow [2021-06-10 14:34:51,377 INFO L129 PetriNetUnfolder]: 0/1085 cut-off events. [2021-06-10 14:34:51,377 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:51,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17916 conditions, 1085 events. 0/1085 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4245 event pairs, 0 based on Foata normal form. 0/904 useless extension candidates. Maximal degree in co-relation 0. Up to 181 conditions per place. [2021-06-10 14:34:51,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 906 places, 545 transitions, 34210 flow [2021-06-10 14:34:51,387 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 904 places, 543 transitions, 34206 flow [2021-06-10 14:34:51,388 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:34:51,388 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:51,388 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:51,388 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:51,388 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:51,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:51,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1593699, now seen corresponding path program 1 times [2021-06-10 14:34:51,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:51,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12492975] [2021-06-10 14:34:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:51,467 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:51,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:51,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12492975] [2021-06-10 14:34:51,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:51,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:51,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997221121] [2021-06-10 14:34:51,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:51,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:51,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:51,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:51,470 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 542 out of 545 [2021-06-10 14:34:51,471 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 543 transitions, 34206 flow. Second operand has 3 states, 3 states have (on average 542.6666666666666) internal successors, (1628), 3 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:51,471 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:51,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 542 of 545 [2021-06-10 14:34:51,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:52,130 INFO L129 PetriNetUnfolder]: 0/542 cut-off events. [2021-06-10 14:34:52,131 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:52,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17375 conditions, 542 events. 0/542 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1042 event pairs, 0 based on Foata normal form. 181/723 useless extension candidates. Maximal degree in co-relation 0. Up to 181 conditions per place. [2021-06-10 14:34:52,132 INFO L132 encePairwiseOnDemand]: 543/545 looper letters, 0 selfloop transitions, 1 changer transitions 0/542 dead transitions. [2021-06-10 14:34:52,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 905 places, 542 transitions, 34206 flow [2021-06-10 14:34:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:52,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1628 transitions. [2021-06-10 14:34:52,133 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9957186544342508 [2021-06-10 14:34:52,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1628 transitions. [2021-06-10 14:34:52,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1628 transitions. [2021-06-10 14:34:52,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:52,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1628 transitions. [2021-06-10 14:34:52,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 542.6666666666666) internal successors, (1628), 3 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:52,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:52,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:52,135 INFO L185 Difference]: Start difference. First operand has 904 places, 543 transitions, 34206 flow. Second operand 3 states and 1628 transitions. [2021-06-10 14:34:52,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 905 places, 542 transitions, 34206 flow [2021-06-10 14:34:54,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 905 places, 542 transitions, 1986 flow, removed 16110 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:54,773 INFO L241 Difference]: Finished difference. Result has 905 places, 542 transitions, 1986 flow [2021-06-10 14:34:54,773 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=545, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=903, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1986, PETRI_PLACES=905, PETRI_TRANSITIONS=542} [2021-06-10 14:34:54,773 INFO L343 CegarLoopForPetriNet]: 904 programPoint places, 1 predicate places. [2021-06-10 14:34:54,773 INFO L480 AbstractCegarLoop]: Abstraction has has 905 places, 542 transitions, 1986 flow [2021-06-10 14:34:54,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 542.6666666666666) internal successors, (1628), 3 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:54,773 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:54,773 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:54,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358 [2021-06-10 14:34:54,773 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:54,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1176202890, now seen corresponding path program 1 times [2021-06-10 14:34:54,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:54,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897583566] [2021-06-10 14:34:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:54,854 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:54,857 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:54,921 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:54,921 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:54,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359 [2021-06-10 14:34:54,921 WARN L342 ceAbstractionStarter]: 180 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:54,921 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 181 thread instances. [2021-06-10 14:34:55,059 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:34:55,059 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:34:55,059 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:34:55,059 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:34:55,059 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:34:55,059 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:34:55,060 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:34:55,060 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:34:55,060 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:34:55,060 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:34:55,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 911 places, 548 transitions, 34581 flow [2021-06-10 14:34:56,047 INFO L129 PetriNetUnfolder]: 0/1091 cut-off events. [2021-06-10 14:34:56,048 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:56,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18106 conditions, 1091 events. 0/1091 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4221 event pairs, 0 based on Foata normal form. 0/909 useless extension candidates. Maximal degree in co-relation 0. Up to 182 conditions per place. [2021-06-10 14:34:56,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 911 places, 548 transitions, 34581 flow [2021-06-10 14:34:56,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 909 places, 546 transitions, 34577 flow [2021-06-10 14:34:56,059 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:34:56,059 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:56,059 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:56,059 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:34:56,059 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:56,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:56,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1611235, now seen corresponding path program 1 times [2021-06-10 14:34:56,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:56,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5718628] [2021-06-10 14:34:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:34:56,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:34:56,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:34:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:34:56,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5718628] [2021-06-10 14:34:56,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:34:56,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:34:56,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929593556] [2021-06-10 14:34:56,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:34:56,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:34:56,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:34:56,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:34:56,141 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 545 out of 548 [2021-06-10 14:34:56,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 909 places, 546 transitions, 34577 flow. Second operand has 3 states, 3 states have (on average 545.6666666666666) internal successors, (1637), 3 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:56,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:34:56,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 545 of 548 [2021-06-10 14:34:56,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:34:57,046 INFO L129 PetriNetUnfolder]: 0/545 cut-off events. [2021-06-10 14:34:57,047 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:34:57,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17562 conditions, 545 events. 0/545 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1089 event pairs, 0 based on Foata normal form. 182/727 useless extension candidates. Maximal degree in co-relation 0. Up to 182 conditions per place. [2021-06-10 14:34:57,048 INFO L132 encePairwiseOnDemand]: 546/548 looper letters, 0 selfloop transitions, 1 changer transitions 0/545 dead transitions. [2021-06-10 14:34:57,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 910 places, 545 transitions, 34577 flow [2021-06-10 14:34:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:34:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:34:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1637 transitions. [2021-06-10 14:34:57,049 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.995742092457421 [2021-06-10 14:34:57,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1637 transitions. [2021-06-10 14:34:57,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1637 transitions. [2021-06-10 14:34:57,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:34:57,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1637 transitions. [2021-06-10 14:34:57,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 545.6666666666666) internal successors, (1637), 3 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:57,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:57,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:57,051 INFO L185 Difference]: Start difference. First operand has 909 places, 546 transitions, 34577 flow. Second operand 3 states and 1637 transitions. [2021-06-10 14:34:57,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 910 places, 545 transitions, 34577 flow [2021-06-10 14:34:59,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 910 places, 545 transitions, 1997 flow, removed 16290 selfloop flow, removed 0 redundant places. [2021-06-10 14:34:59,600 INFO L241 Difference]: Finished difference. Result has 910 places, 545 transitions, 1997 flow [2021-06-10 14:34:59,600 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=908, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1997, PETRI_PLACES=910, PETRI_TRANSITIONS=545} [2021-06-10 14:34:59,600 INFO L343 CegarLoopForPetriNet]: 909 programPoint places, 1 predicate places. [2021-06-10 14:34:59,600 INFO L480 AbstractCegarLoop]: Abstraction has has 910 places, 545 transitions, 1997 flow [2021-06-10 14:34:59,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 545.6666666666666) internal successors, (1637), 3 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:34:59,601 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:34:59,601 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:34:59,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360 [2021-06-10 14:34:59,601 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:34:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:34:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash -745449867, now seen corresponding path program 1 times [2021-06-10 14:34:59,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:34:59,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702214447] [2021-06-10 14:34:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:34:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:59,802 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:34:59,805 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:34:59,868 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:34:59,868 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:34:59,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361 [2021-06-10 14:34:59,868 WARN L342 ceAbstractionStarter]: 181 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:34:59,868 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 182 thread instances. [2021-06-10 14:35:00,007 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:35:00,008 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:35:00,008 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:35:00,008 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:35:00,008 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:35:00,008 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:35:00,008 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:35:00,008 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:35:00,008 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:35:00,008 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:35:00,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 916 places, 551 transitions, 34954 flow [2021-06-10 14:35:00,968 INFO L129 PetriNetUnfolder]: 0/1097 cut-off events. [2021-06-10 14:35:00,968 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:00,968 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18297 conditions, 1097 events. 0/1097 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4342 event pairs, 0 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 0. Up to 183 conditions per place. [2021-06-10 14:35:00,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 916 places, 551 transitions, 34954 flow [2021-06-10 14:35:00,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 914 places, 549 transitions, 34950 flow [2021-06-10 14:35:00,979 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:35:00,979 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:00,979 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:00,979 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:35:00,979 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:00,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1628867, now seen corresponding path program 1 times [2021-06-10 14:35:00,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:00,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268753198] [2021-06-10 14:35:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:35:01,136 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:35:01,137 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:35:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:35:01,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268753198] [2021-06-10 14:35:01,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:35:01,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:35:01,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904260137] [2021-06-10 14:35:01,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:35:01,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:35:01,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:35:01,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:35:01,140 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 548 out of 551 [2021-06-10 14:35:01,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 914 places, 549 transitions, 34950 flow. Second operand has 3 states, 3 states have (on average 548.6666666666666) internal successors, (1646), 3 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:01,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:35:01,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 548 of 551 [2021-06-10 14:35:01,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:35:01,755 INFO L129 PetriNetUnfolder]: 0/548 cut-off events. [2021-06-10 14:35:01,755 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:01,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17750 conditions, 548 events. 0/548 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1110 event pairs, 0 based on Foata normal form. 183/731 useless extension candidates. Maximal degree in co-relation 0. Up to 183 conditions per place. [2021-06-10 14:35:01,757 INFO L132 encePairwiseOnDemand]: 549/551 looper letters, 0 selfloop transitions, 1 changer transitions 0/548 dead transitions. [2021-06-10 14:35:01,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 915 places, 548 transitions, 34950 flow [2021-06-10 14:35:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:35:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:35:01,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1646 transitions. [2021-06-10 14:35:01,758 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9957652752571083 [2021-06-10 14:35:01,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1646 transitions. [2021-06-10 14:35:01,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1646 transitions. [2021-06-10 14:35:01,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:35:01,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1646 transitions. [2021-06-10 14:35:01,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 548.6666666666666) internal successors, (1646), 3 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:01,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 551.0) internal successors, (2204), 4 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:01,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 551.0) internal successors, (2204), 4 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:01,760 INFO L185 Difference]: Start difference. First operand has 914 places, 549 transitions, 34950 flow. Second operand 3 states and 1646 transitions. [2021-06-10 14:35:01,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 915 places, 548 transitions, 34950 flow [2021-06-10 14:35:04,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 915 places, 548 transitions, 2008 flow, removed 16471 selfloop flow, removed 0 redundant places. [2021-06-10 14:35:04,621 INFO L241 Difference]: Finished difference. Result has 915 places, 548 transitions, 2008 flow [2021-06-10 14:35:04,621 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=913, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2008, PETRI_PLACES=915, PETRI_TRANSITIONS=548} [2021-06-10 14:35:04,621 INFO L343 CegarLoopForPetriNet]: 914 programPoint places, 1 predicate places. [2021-06-10 14:35:04,621 INFO L480 AbstractCegarLoop]: Abstraction has has 915 places, 548 transitions, 2008 flow [2021-06-10 14:35:04,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 548.6666666666666) internal successors, (1646), 3 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:04,621 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:04,621 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:35:04,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362 [2021-06-10 14:35:04,621 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:04,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:04,621 INFO L82 PathProgramCache]: Analyzing trace with hash -153479687, now seen corresponding path program 1 times [2021-06-10 14:35:04,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:04,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680071722] [2021-06-10 14:35:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:04,702 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:04,705 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:04,771 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:35:04,771 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:35:04,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363 [2021-06-10 14:35:04,771 WARN L342 ceAbstractionStarter]: 182 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:35:04,771 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 183 thread instances. [2021-06-10 14:35:04,903 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:35:04,903 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:35:04,903 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:35:04,903 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:35:04,903 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:35:04,903 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:35:04,903 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:35:04,903 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:35:04,903 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:35:04,903 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:35:04,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 921 places, 554 transitions, 35329 flow [2021-06-10 14:35:05,906 INFO L129 PetriNetUnfolder]: 0/1103 cut-off events. [2021-06-10 14:35:05,907 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:05,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18489 conditions, 1103 events. 0/1103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4111 event pairs, 0 based on Foata normal form. 0/919 useless extension candidates. Maximal degree in co-relation 0. Up to 184 conditions per place. [2021-06-10 14:35:05,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 921 places, 554 transitions, 35329 flow [2021-06-10 14:35:05,917 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 919 places, 552 transitions, 35325 flow [2021-06-10 14:35:05,918 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:35:05,918 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:05,918 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:05,918 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:35:05,918 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:05,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1646595, now seen corresponding path program 1 times [2021-06-10 14:35:05,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:05,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237817332] [2021-06-10 14:35:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:35:06,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:35:06,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:35:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:35:06,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237817332] [2021-06-10 14:35:06,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:35:06,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:35:06,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156669654] [2021-06-10 14:35:06,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:35:06,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:35:06,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:35:06,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:35:06,004 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 554 [2021-06-10 14:35:06,005 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 919 places, 552 transitions, 35325 flow. Second operand has 3 states, 3 states have (on average 551.6666666666666) internal successors, (1655), 3 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:06,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:35:06,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 554 [2021-06-10 14:35:06,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:35:06,809 INFO L129 PetriNetUnfolder]: 0/551 cut-off events. [2021-06-10 14:35:06,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:06,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17939 conditions, 551 events. 0/551 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1114 event pairs, 0 based on Foata normal form. 184/735 useless extension candidates. Maximal degree in co-relation 0. Up to 184 conditions per place. [2021-06-10 14:35:06,811 INFO L132 encePairwiseOnDemand]: 552/554 looper letters, 0 selfloop transitions, 1 changer transitions 0/551 dead transitions. [2021-06-10 14:35:06,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 920 places, 551 transitions, 35325 flow [2021-06-10 14:35:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:35:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:35:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1655 transitions. [2021-06-10 14:35:06,812 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9957882069795427 [2021-06-10 14:35:06,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1655 transitions. [2021-06-10 14:35:06,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1655 transitions. [2021-06-10 14:35:06,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:35:06,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1655 transitions. [2021-06-10 14:35:06,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 551.6666666666666) internal successors, (1655), 3 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:06,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 554.0) internal successors, (2216), 4 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:06,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 554.0) internal successors, (2216), 4 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:06,814 INFO L185 Difference]: Start difference. First operand has 919 places, 552 transitions, 35325 flow. Second operand 3 states and 1655 transitions. [2021-06-10 14:35:06,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 920 places, 551 transitions, 35325 flow [2021-06-10 14:35:09,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 920 places, 551 transitions, 2019 flow, removed 16653 selfloop flow, removed 0 redundant places. [2021-06-10 14:35:09,480 INFO L241 Difference]: Finished difference. Result has 920 places, 551 transitions, 2019 flow [2021-06-10 14:35:09,480 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=554, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=918, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2019, PETRI_PLACES=920, PETRI_TRANSITIONS=551} [2021-06-10 14:35:09,480 INFO L343 CegarLoopForPetriNet]: 919 programPoint places, 1 predicate places. [2021-06-10 14:35:09,480 INFO L480 AbstractCegarLoop]: Abstraction has has 920 places, 551 transitions, 2019 flow [2021-06-10 14:35:09,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 551.6666666666666) internal successors, (1655), 3 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:09,481 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:09,481 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:35:09,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364 [2021-06-10 14:35:09,481 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:09,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1607361115, now seen corresponding path program 1 times [2021-06-10 14:35:09,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:09,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270815538] [2021-06-10 14:35:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:09,561 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:09,564 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:09,630 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:35:09,630 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:35:09,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365 [2021-06-10 14:35:09,631 WARN L342 ceAbstractionStarter]: 183 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:35:09,631 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 184 thread instances. [2021-06-10 14:35:09,885 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:35:09,885 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:35:09,885 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:35:09,885 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:35:09,885 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:35:09,885 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:35:09,885 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:35:09,886 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:35:09,886 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:35:09,886 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:35:09,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 926 places, 557 transitions, 35706 flow [2021-06-10 14:35:10,682 INFO L129 PetriNetUnfolder]: 0/1109 cut-off events. [2021-06-10 14:35:10,682 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:10,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18682 conditions, 1109 events. 0/1109 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4397 event pairs, 0 based on Foata normal form. 0/924 useless extension candidates. Maximal degree in co-relation 0. Up to 185 conditions per place. [2021-06-10 14:35:10,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 926 places, 557 transitions, 35706 flow [2021-06-10 14:35:10,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 924 places, 555 transitions, 35702 flow [2021-06-10 14:35:10,693 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:35:10,693 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:10,693 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:10,693 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:35:10,693 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:10,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1664419, now seen corresponding path program 1 times [2021-06-10 14:35:10,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:10,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282936188] [2021-06-10 14:35:10,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:35:10,775 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:35:10,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:35:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:35:10,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282936188] [2021-06-10 14:35:10,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:35:10,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:35:10,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965508697] [2021-06-10 14:35:10,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:35:10,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:35:10,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:35:10,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:35:10,778 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 557 [2021-06-10 14:35:10,779 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 924 places, 555 transitions, 35702 flow. Second operand has 3 states, 3 states have (on average 554.6666666666666) internal successors, (1664), 3 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:10,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:35:10,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 557 [2021-06-10 14:35:10,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:35:11,457 INFO L129 PetriNetUnfolder]: 0/554 cut-off events. [2021-06-10 14:35:11,457 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:11,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18129 conditions, 554 events. 0/554 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1046 event pairs, 0 based on Foata normal form. 185/739 useless extension candidates. Maximal degree in co-relation 0. Up to 185 conditions per place. [2021-06-10 14:35:11,459 INFO L132 encePairwiseOnDemand]: 555/557 looper letters, 0 selfloop transitions, 1 changer transitions 0/554 dead transitions. [2021-06-10 14:35:11,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 925 places, 554 transitions, 35702 flow [2021-06-10 14:35:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:35:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:35:11,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1664 transitions. [2021-06-10 14:35:11,459 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9958108916816277 [2021-06-10 14:35:11,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1664 transitions. [2021-06-10 14:35:11,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1664 transitions. [2021-06-10 14:35:11,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:35:11,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1664 transitions. [2021-06-10 14:35:11,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 554.6666666666666) internal successors, (1664), 3 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:11,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 557.0) internal successors, (2228), 4 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:11,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 557.0) internal successors, (2228), 4 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:11,461 INFO L185 Difference]: Start difference. First operand has 924 places, 555 transitions, 35702 flow. Second operand 3 states and 1664 transitions. [2021-06-10 14:35:11,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 925 places, 554 transitions, 35702 flow [2021-06-10 14:35:14,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 925 places, 554 transitions, 2030 flow, removed 16836 selfloop flow, removed 0 redundant places. [2021-06-10 14:35:14,350 INFO L241 Difference]: Finished difference. Result has 925 places, 554 transitions, 2030 flow [2021-06-10 14:35:14,350 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=923, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2030, PETRI_PLACES=925, PETRI_TRANSITIONS=554} [2021-06-10 14:35:14,350 INFO L343 CegarLoopForPetriNet]: 924 programPoint places, 1 predicate places. [2021-06-10 14:35:14,350 INFO L480 AbstractCegarLoop]: Abstraction has has 925 places, 554 transitions, 2030 flow [2021-06-10 14:35:14,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 554.6666666666666) internal successors, (1664), 3 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:14,350 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:14,350 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:35:14,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366 [2021-06-10 14:35:14,350 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:14,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1725842500, now seen corresponding path program 1 times [2021-06-10 14:35:14,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:14,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697256271] [2021-06-10 14:35:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:14,433 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:14,436 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:14,503 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:35:14,503 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:35:14,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367 [2021-06-10 14:35:14,504 WARN L342 ceAbstractionStarter]: 184 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:35:14,504 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 185 thread instances. [2021-06-10 14:35:14,638 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:35:14,638 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:35:14,639 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:35:14,639 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:35:14,639 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:35:14,639 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:35:14,639 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:35:14,639 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:35:14,639 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:35:14,639 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:35:14,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 931 places, 560 transitions, 36085 flow [2021-06-10 14:35:15,689 INFO L129 PetriNetUnfolder]: 0/1115 cut-off events. [2021-06-10 14:35:15,690 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:15,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18876 conditions, 1115 events. 0/1115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4316 event pairs, 0 based on Foata normal form. 0/929 useless extension candidates. Maximal degree in co-relation 0. Up to 186 conditions per place. [2021-06-10 14:35:15,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 931 places, 560 transitions, 36085 flow [2021-06-10 14:35:15,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 929 places, 558 transitions, 36081 flow [2021-06-10 14:35:15,701 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:35:15,701 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:15,701 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:15,701 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:35:15,701 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:15,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1682339, now seen corresponding path program 1 times [2021-06-10 14:35:15,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:15,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23677683] [2021-06-10 14:35:15,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:35:15,788 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:35:15,788 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:35:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:35:15,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23677683] [2021-06-10 14:35:15,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:35:15,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:35:15,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101760279] [2021-06-10 14:35:15,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:35:15,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:35:15,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:35:15,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:35:15,791 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 557 out of 560 [2021-06-10 14:35:15,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 929 places, 558 transitions, 36081 flow. Second operand has 3 states, 3 states have (on average 557.6666666666666) internal successors, (1673), 3 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:15,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:35:15,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 557 of 560 [2021-06-10 14:35:15,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:35:16,649 INFO L129 PetriNetUnfolder]: 0/557 cut-off events. [2021-06-10 14:35:16,649 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:16,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18320 conditions, 557 events. 0/557 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1139 event pairs, 0 based on Foata normal form. 186/743 useless extension candidates. Maximal degree in co-relation 0. Up to 186 conditions per place. [2021-06-10 14:35:16,651 INFO L132 encePairwiseOnDemand]: 558/560 looper letters, 0 selfloop transitions, 1 changer transitions 0/557 dead transitions. [2021-06-10 14:35:16,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 557 transitions, 36081 flow [2021-06-10 14:35:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:35:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:35:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1673 transitions. [2021-06-10 14:35:16,652 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9958333333333333 [2021-06-10 14:35:16,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1673 transitions. [2021-06-10 14:35:16,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1673 transitions. [2021-06-10 14:35:16,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:35:16,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1673 transitions. [2021-06-10 14:35:16,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 557.6666666666666) internal successors, (1673), 3 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:16,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 560.0) internal successors, (2240), 4 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:16,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 560.0) internal successors, (2240), 4 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:16,654 INFO L185 Difference]: Start difference. First operand has 929 places, 558 transitions, 36081 flow. Second operand 3 states and 1673 transitions. [2021-06-10 14:35:16,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 557 transitions, 36081 flow [2021-06-10 14:35:19,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 930 places, 557 transitions, 2041 flow, removed 17020 selfloop flow, removed 0 redundant places. [2021-06-10 14:35:19,435 INFO L241 Difference]: Finished difference. Result has 930 places, 557 transitions, 2041 flow [2021-06-10 14:35:19,435 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=560, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2041, PETRI_PLACES=930, PETRI_TRANSITIONS=557} [2021-06-10 14:35:19,435 INFO L343 CegarLoopForPetriNet]: 929 programPoint places, 1 predicate places. [2021-06-10 14:35:19,435 INFO L480 AbstractCegarLoop]: Abstraction has has 930 places, 557 transitions, 2041 flow [2021-06-10 14:35:19,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 557.6666666666666) internal successors, (1673), 3 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:19,435 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:19,435 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:35:19,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368 [2021-06-10 14:35:19,436 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:19,436 INFO L82 PathProgramCache]: Analyzing trace with hash 40806945, now seen corresponding path program 1 times [2021-06-10 14:35:19,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:19,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802294231] [2021-06-10 14:35:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:19,522 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:19,524 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:19,594 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:35:19,594 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:35:19,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369 [2021-06-10 14:35:19,594 WARN L342 ceAbstractionStarter]: 185 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:35:19,594 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 186 thread instances. [2021-06-10 14:35:19,854 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:35:19,854 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:35:19,855 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:35:19,855 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:35:19,855 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:35:19,855 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:35:19,855 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:35:19,855 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:35:19,855 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:35:19,855 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:35:19,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 936 places, 563 transitions, 36466 flow [2021-06-10 14:35:20,691 INFO L129 PetriNetUnfolder]: 0/1121 cut-off events. [2021-06-10 14:35:20,691 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:20,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19071 conditions, 1121 events. 0/1121 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4459 event pairs, 0 based on Foata normal form. 0/934 useless extension candidates. Maximal degree in co-relation 0. Up to 187 conditions per place. [2021-06-10 14:35:20,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 936 places, 563 transitions, 36466 flow [2021-06-10 14:35:20,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 934 places, 561 transitions, 36462 flow [2021-06-10 14:35:20,703 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:35:20,703 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:20,703 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:20,703 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:35:20,703 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:20,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1700355, now seen corresponding path program 1 times [2021-06-10 14:35:20,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:20,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795805826] [2021-06-10 14:35:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:35:20,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:35:20,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:35:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:35:20,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795805826] [2021-06-10 14:35:20,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:35:20,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:35:20,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110292703] [2021-06-10 14:35:20,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:35:20,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:35:20,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:35:20,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:35:20,788 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 560 out of 563 [2021-06-10 14:35:20,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 934 places, 561 transitions, 36462 flow. Second operand has 3 states, 3 states have (on average 560.6666666666666) internal successors, (1682), 3 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:20,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:35:20,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 560 of 563 [2021-06-10 14:35:20,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:35:21,493 INFO L129 PetriNetUnfolder]: 0/560 cut-off events. [2021-06-10 14:35:21,493 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:21,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18512 conditions, 560 events. 0/560 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1150 event pairs, 0 based on Foata normal form. 187/747 useless extension candidates. Maximal degree in co-relation 0. Up to 187 conditions per place. [2021-06-10 14:35:21,495 INFO L132 encePairwiseOnDemand]: 561/563 looper letters, 0 selfloop transitions, 1 changer transitions 0/560 dead transitions. [2021-06-10 14:35:21,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 935 places, 560 transitions, 36462 flow [2021-06-10 14:35:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:35:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:35:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1682 transitions. [2021-06-10 14:35:21,496 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9958555358200119 [2021-06-10 14:35:21,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1682 transitions. [2021-06-10 14:35:21,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1682 transitions. [2021-06-10 14:35:21,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:35:21,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1682 transitions. [2021-06-10 14:35:21,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 560.6666666666666) internal successors, (1682), 3 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:21,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:21,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:21,498 INFO L185 Difference]: Start difference. First operand has 934 places, 561 transitions, 36462 flow. Second operand 3 states and 1682 transitions. [2021-06-10 14:35:21,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 935 places, 560 transitions, 36462 flow [2021-06-10 14:35:24,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 935 places, 560 transitions, 2052 flow, removed 17205 selfloop flow, removed 0 redundant places. [2021-06-10 14:35:24,602 INFO L241 Difference]: Finished difference. Result has 935 places, 560 transitions, 2052 flow [2021-06-10 14:35:24,603 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=933, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2052, PETRI_PLACES=935, PETRI_TRANSITIONS=560} [2021-06-10 14:35:24,603 INFO L343 CegarLoopForPetriNet]: 934 programPoint places, 1 predicate places. [2021-06-10 14:35:24,603 INFO L480 AbstractCegarLoop]: Abstraction has has 935 places, 560 transitions, 2052 flow [2021-06-10 14:35:24,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 560.6666666666666) internal successors, (1682), 3 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:24,603 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:24,603 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:35:24,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370 [2021-06-10 14:35:24,603 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:24,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:24,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1278983999, now seen corresponding path program 1 times [2021-06-10 14:35:24,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:24,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341847089] [2021-06-10 14:35:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:24,689 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:24,692 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:24,760 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:35:24,760 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:35:24,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371 [2021-06-10 14:35:24,761 WARN L342 ceAbstractionStarter]: 186 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:35:24,761 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 187 thread instances. [2021-06-10 14:35:24,897 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:35:24,898 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:35:24,898 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:35:24,898 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:35:24,898 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:35:24,898 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:35:24,898 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:35:24,898 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:35:24,898 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:35:24,898 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:35:24,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 941 places, 566 transitions, 36849 flow [2021-06-10 14:35:25,938 INFO L129 PetriNetUnfolder]: 0/1127 cut-off events. [2021-06-10 14:35:25,939 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:25,939 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19267 conditions, 1127 events. 0/1127 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4430 event pairs, 0 based on Foata normal form. 0/939 useless extension candidates. Maximal degree in co-relation 0. Up to 188 conditions per place. [2021-06-10 14:35:25,939 INFO L82 GeneralOperation]: Start removeDead. Operand has 941 places, 566 transitions, 36849 flow [2021-06-10 14:35:25,950 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 939 places, 564 transitions, 36845 flow [2021-06-10 14:35:25,950 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:35:25,950 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:25,950 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:25,951 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:35:25,951 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:25,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:25,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1718467, now seen corresponding path program 1 times [2021-06-10 14:35:25,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:25,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883894711] [2021-06-10 14:35:25,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:35:26,036 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:35:26,036 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:35:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:35:26,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883894711] [2021-06-10 14:35:26,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:35:26,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:35:26,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34675917] [2021-06-10 14:35:26,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:35:26,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:35:26,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:35:26,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:35:26,039 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 563 out of 566 [2021-06-10 14:35:26,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 939 places, 564 transitions, 36845 flow. Second operand has 3 states, 3 states have (on average 563.6666666666666) internal successors, (1691), 3 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:26,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:35:26,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 563 of 566 [2021-06-10 14:35:26,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:35:26,914 INFO L129 PetriNetUnfolder]: 0/563 cut-off events. [2021-06-10 14:35:26,915 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:26,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18705 conditions, 563 events. 0/563 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1114 event pairs, 0 based on Foata normal form. 188/751 useless extension candidates. Maximal degree in co-relation 0. Up to 188 conditions per place. [2021-06-10 14:35:26,916 INFO L132 encePairwiseOnDemand]: 564/566 looper letters, 0 selfloop transitions, 1 changer transitions 0/563 dead transitions. [2021-06-10 14:35:26,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 940 places, 563 transitions, 36845 flow [2021-06-10 14:35:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:35:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:35:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1691 transitions. [2021-06-10 14:35:26,917 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9958775029446407 [2021-06-10 14:35:26,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1691 transitions. [2021-06-10 14:35:26,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1691 transitions. [2021-06-10 14:35:26,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:35:26,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1691 transitions. [2021-06-10 14:35:26,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 563.6666666666666) internal successors, (1691), 3 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:26,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 566.0) internal successors, (2264), 4 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:26,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 566.0) internal successors, (2264), 4 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:26,919 INFO L185 Difference]: Start difference. First operand has 939 places, 564 transitions, 36845 flow. Second operand 3 states and 1691 transitions. [2021-06-10 14:35:26,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 940 places, 563 transitions, 36845 flow [2021-06-10 14:35:29,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 940 places, 563 transitions, 2063 flow, removed 17391 selfloop flow, removed 0 redundant places. [2021-06-10 14:35:29,907 INFO L241 Difference]: Finished difference. Result has 940 places, 563 transitions, 2063 flow [2021-06-10 14:35:29,908 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=566, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=938, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2063, PETRI_PLACES=940, PETRI_TRANSITIONS=563} [2021-06-10 14:35:29,908 INFO L343 CegarLoopForPetriNet]: 939 programPoint places, 1 predicate places. [2021-06-10 14:35:29,908 INFO L480 AbstractCegarLoop]: Abstraction has has 940 places, 563 transitions, 2063 flow [2021-06-10 14:35:29,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 563.6666666666666) internal successors, (1691), 3 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:29,908 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:29,908 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:35:29,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372 [2021-06-10 14:35:29,908 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:29,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1830903657, now seen corresponding path program 1 times [2021-06-10 14:35:29,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:29,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034481157] [2021-06-10 14:35:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:29,992 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:29,995 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:30,065 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:35:30,065 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:35:30,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373 [2021-06-10 14:35:30,066 WARN L342 ceAbstractionStarter]: 187 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:35:30,066 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 188 thread instances. [2021-06-10 14:35:30,338 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:35:30,338 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:35:30,338 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:35:30,338 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:35:30,339 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:35:30,339 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:35:30,339 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:35:30,339 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:35:30,339 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:35:30,339 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:35:30,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 946 places, 569 transitions, 37234 flow [2021-06-10 14:35:31,205 INFO L129 PetriNetUnfolder]: 0/1133 cut-off events. [2021-06-10 14:35:31,205 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:31,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19464 conditions, 1133 events. 0/1133 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4407 event pairs, 0 based on Foata normal form. 0/944 useless extension candidates. Maximal degree in co-relation 0. Up to 189 conditions per place. [2021-06-10 14:35:31,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 946 places, 569 transitions, 37234 flow [2021-06-10 14:35:31,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 944 places, 567 transitions, 37230 flow [2021-06-10 14:35:31,218 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:35:31,218 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:31,218 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:31,218 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:35:31,218 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:31,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:31,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1736675, now seen corresponding path program 1 times [2021-06-10 14:35:31,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:31,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358927669] [2021-06-10 14:35:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:35:31,375 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:35:31,376 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:35:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:35:31,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358927669] [2021-06-10 14:35:31,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:35:31,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:35:31,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868128758] [2021-06-10 14:35:31,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:35:31,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:35:31,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:35:31,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:35:31,379 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 566 out of 569 [2021-06-10 14:35:31,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 944 places, 567 transitions, 37230 flow. Second operand has 3 states, 3 states have (on average 566.6666666666666) internal successors, (1700), 3 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:31,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:35:31,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 566 of 569 [2021-06-10 14:35:31,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:35:32,036 INFO L129 PetriNetUnfolder]: 0/566 cut-off events. [2021-06-10 14:35:32,037 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:32,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18899 conditions, 566 events. 0/566 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1072 event pairs, 0 based on Foata normal form. 189/755 useless extension candidates. Maximal degree in co-relation 0. Up to 189 conditions per place. [2021-06-10 14:35:32,038 INFO L132 encePairwiseOnDemand]: 567/569 looper letters, 0 selfloop transitions, 1 changer transitions 0/566 dead transitions. [2021-06-10 14:35:32,038 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 945 places, 566 transitions, 37230 flow [2021-06-10 14:35:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:35:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:35:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1700 transitions. [2021-06-10 14:35:32,039 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9958992384299942 [2021-06-10 14:35:32,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1700 transitions. [2021-06-10 14:35:32,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1700 transitions. [2021-06-10 14:35:32,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:35:32,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1700 transitions. [2021-06-10 14:35:32,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 566.6666666666666) internal successors, (1700), 3 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:32,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 569.0) internal successors, (2276), 4 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:32,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 569.0) internal successors, (2276), 4 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:32,041 INFO L185 Difference]: Start difference. First operand has 944 places, 567 transitions, 37230 flow. Second operand 3 states and 1700 transitions. [2021-06-10 14:35:32,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 945 places, 566 transitions, 37230 flow [2021-06-10 14:35:35,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 945 places, 566 transitions, 2074 flow, removed 17578 selfloop flow, removed 0 redundant places. [2021-06-10 14:35:35,231 INFO L241 Difference]: Finished difference. Result has 945 places, 566 transitions, 2074 flow [2021-06-10 14:35:35,231 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=943, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2074, PETRI_PLACES=945, PETRI_TRANSITIONS=566} [2021-06-10 14:35:35,231 INFO L343 CegarLoopForPetriNet]: 944 programPoint places, 1 predicate places. [2021-06-10 14:35:35,231 INFO L480 AbstractCegarLoop]: Abstraction has has 945 places, 566 transitions, 2074 flow [2021-06-10 14:35:35,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 566.6666666666666) internal successors, (1700), 3 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:35,231 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:35,231 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:35:35,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374 [2021-06-10 14:35:35,231 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:35,231 INFO L82 PathProgramCache]: Analyzing trace with hash 798104834, now seen corresponding path program 1 times [2021-06-10 14:35:35,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:35,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625385648] [2021-06-10 14:35:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:35,321 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:35,324 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:35,395 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:35:35,396 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:35:35,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375 [2021-06-10 14:35:35,396 WARN L342 ceAbstractionStarter]: 188 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:35:35,396 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 189 thread instances. [2021-06-10 14:35:35,549 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:35:35,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:35:35,550 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:35:35,550 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:35:35,550 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:35:35,550 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:35:35,550 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:35:35,550 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:35:35,550 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:35:35,550 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:35:35,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 951 places, 572 transitions, 37621 flow [2021-06-10 14:35:36,651 INFO L129 PetriNetUnfolder]: 0/1139 cut-off events. [2021-06-10 14:35:36,651 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:36,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19662 conditions, 1139 events. 0/1139 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4313 event pairs, 0 based on Foata normal form. 0/949 useless extension candidates. Maximal degree in co-relation 0. Up to 190 conditions per place. [2021-06-10 14:35:36,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 951 places, 572 transitions, 37621 flow [2021-06-10 14:35:36,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 949 places, 570 transitions, 37617 flow [2021-06-10 14:35:36,663 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:35:36,663 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:36,664 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:36,664 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:35:36,664 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:36,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1754979, now seen corresponding path program 1 times [2021-06-10 14:35:36,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:36,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377775100] [2021-06-10 14:35:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:35:36,761 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:35:36,761 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:35:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:35:36,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377775100] [2021-06-10 14:35:36,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:35:36,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:35:36,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599876180] [2021-06-10 14:35:36,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:35:36,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:35:36,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:35:36,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:35:36,764 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 569 out of 572 [2021-06-10 14:35:36,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 949 places, 570 transitions, 37617 flow. Second operand has 3 states, 3 states have (on average 569.6666666666666) internal successors, (1709), 3 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:36,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:35:36,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 569 of 572 [2021-06-10 14:35:36,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:35:37,669 INFO L129 PetriNetUnfolder]: 0/569 cut-off events. [2021-06-10 14:35:37,669 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:37,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19094 conditions, 569 events. 0/569 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1119 event pairs, 0 based on Foata normal form. 190/759 useless extension candidates. Maximal degree in co-relation 0. Up to 190 conditions per place. [2021-06-10 14:35:37,671 INFO L132 encePairwiseOnDemand]: 570/572 looper letters, 0 selfloop transitions, 1 changer transitions 0/569 dead transitions. [2021-06-10 14:35:37,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 950 places, 569 transitions, 37617 flow [2021-06-10 14:35:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:35:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:35:37,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1709 transitions. [2021-06-10 14:35:37,672 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.995920745920746 [2021-06-10 14:35:37,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1709 transitions. [2021-06-10 14:35:37,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1709 transitions. [2021-06-10 14:35:37,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:35:37,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1709 transitions. [2021-06-10 14:35:37,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 569.6666666666666) internal successors, (1709), 3 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:37,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:37,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:37,674 INFO L185 Difference]: Start difference. First operand has 949 places, 570 transitions, 37617 flow. Second operand 3 states and 1709 transitions. [2021-06-10 14:35:37,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 950 places, 569 transitions, 37617 flow [2021-06-10 14:35:40,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 950 places, 569 transitions, 2085 flow, removed 17766 selfloop flow, removed 0 redundant places. [2021-06-10 14:35:40,735 INFO L241 Difference]: Finished difference. Result has 950 places, 569 transitions, 2085 flow [2021-06-10 14:35:40,735 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=948, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2085, PETRI_PLACES=950, PETRI_TRANSITIONS=569} [2021-06-10 14:35:40,735 INFO L343 CegarLoopForPetriNet]: 949 programPoint places, 1 predicate places. [2021-06-10 14:35:40,735 INFO L480 AbstractCegarLoop]: Abstraction has has 950 places, 569 transitions, 2085 flow [2021-06-10 14:35:40,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 569.6666666666666) internal successors, (1709), 3 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:40,735 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:40,736 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:35:40,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376 [2021-06-10 14:35:40,736 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:40,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1455365891, now seen corresponding path program 1 times [2021-06-10 14:35:40,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:40,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869177839] [2021-06-10 14:35:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:40,828 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:40,831 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:41,013 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:35:41,013 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:35:41,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377 [2021-06-10 14:35:41,014 WARN L342 ceAbstractionStarter]: 189 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:35:41,014 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 190 thread instances. [2021-06-10 14:35:41,152 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:35:41,152 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:35:41,153 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:35:41,153 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:35:41,153 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:35:41,153 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:35:41,153 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:35:41,153 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:35:41,153 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:35:41,153 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:35:41,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 956 places, 575 transitions, 38010 flow [2021-06-10 14:35:42,031 INFO L129 PetriNetUnfolder]: 0/1145 cut-off events. [2021-06-10 14:35:42,031 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:42,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19861 conditions, 1145 events. 0/1145 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4550 event pairs, 0 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 0. Up to 191 conditions per place. [2021-06-10 14:35:42,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 956 places, 575 transitions, 38010 flow [2021-06-10 14:35:42,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 954 places, 573 transitions, 38006 flow [2021-06-10 14:35:42,043 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:35:42,043 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:42,043 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:42,043 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:35:42,043 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:42,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:42,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1773379, now seen corresponding path program 1 times [2021-06-10 14:35:42,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:42,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82333742] [2021-06-10 14:35:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:35:42,173 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:35:42,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:35:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:35:42,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82333742] [2021-06-10 14:35:42,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:35:42,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:35:42,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110456163] [2021-06-10 14:35:42,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:35:42,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:35:42,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:35:42,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:35:42,177 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 572 out of 575 [2021-06-10 14:35:42,177 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 954 places, 573 transitions, 38006 flow. Second operand has 3 states, 3 states have (on average 572.6666666666666) internal successors, (1718), 3 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:42,177 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:35:42,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 572 of 575 [2021-06-10 14:35:42,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:35:42,854 INFO L129 PetriNetUnfolder]: 0/572 cut-off events. [2021-06-10 14:35:42,855 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:42,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19290 conditions, 572 events. 0/572 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1130 event pairs, 0 based on Foata normal form. 191/763 useless extension candidates. Maximal degree in co-relation 0. Up to 191 conditions per place. [2021-06-10 14:35:42,856 INFO L132 encePairwiseOnDemand]: 573/575 looper letters, 0 selfloop transitions, 1 changer transitions 0/572 dead transitions. [2021-06-10 14:35:42,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 955 places, 572 transitions, 38006 flow [2021-06-10 14:35:42,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:35:42,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:35:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1718 transitions. [2021-06-10 14:35:42,857 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9959420289855072 [2021-06-10 14:35:42,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1718 transitions. [2021-06-10 14:35:42,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1718 transitions. [2021-06-10 14:35:42,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:35:42,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1718 transitions. [2021-06-10 14:35:42,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 572.6666666666666) internal successors, (1718), 3 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:42,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:42,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:42,859 INFO L185 Difference]: Start difference. First operand has 954 places, 573 transitions, 38006 flow. Second operand 3 states and 1718 transitions. [2021-06-10 14:35:42,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 955 places, 572 transitions, 38006 flow [2021-06-10 14:35:46,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 955 places, 572 transitions, 2096 flow, removed 17955 selfloop flow, removed 0 redundant places. [2021-06-10 14:35:46,180 INFO L241 Difference]: Finished difference. Result has 955 places, 572 transitions, 2096 flow [2021-06-10 14:35:46,180 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=953, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2096, PETRI_PLACES=955, PETRI_TRANSITIONS=572} [2021-06-10 14:35:46,180 INFO L343 CegarLoopForPetriNet]: 954 programPoint places, 1 predicate places. [2021-06-10 14:35:46,180 INFO L480 AbstractCegarLoop]: Abstraction has has 955 places, 572 transitions, 2096 flow [2021-06-10 14:35:46,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 572.6666666666666) internal successors, (1718), 3 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:46,181 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:46,181 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:35:46,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable378 [2021-06-10 14:35:46,181 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1676185989, now seen corresponding path program 1 times [2021-06-10 14:35:46,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:46,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020371415] [2021-06-10 14:35:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:46,267 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:46,270 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:46,343 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:35:46,344 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:35:46,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379 [2021-06-10 14:35:46,344 WARN L342 ceAbstractionStarter]: 190 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:35:46,344 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 191 thread instances. [2021-06-10 14:35:46,484 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:35:46,484 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:35:46,484 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:35:46,484 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:35:46,484 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:35:46,485 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:35:46,485 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:35:46,485 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:35:46,485 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:35:46,485 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:35:46,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 961 places, 578 transitions, 38401 flow [2021-06-10 14:35:47,541 INFO L129 PetriNetUnfolder]: 0/1151 cut-off events. [2021-06-10 14:35:47,541 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:47,542 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20061 conditions, 1151 events. 0/1151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4485 event pairs, 0 based on Foata normal form. 0/959 useless extension candidates. Maximal degree in co-relation 0. Up to 192 conditions per place. [2021-06-10 14:35:47,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 961 places, 578 transitions, 38401 flow [2021-06-10 14:35:47,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 959 places, 576 transitions, 38397 flow [2021-06-10 14:35:47,554 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:35:47,554 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:47,554 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:47,554 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:35:47,554 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:47,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1791875, now seen corresponding path program 1 times [2021-06-10 14:35:47,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:47,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053015095] [2021-06-10 14:35:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:35:47,641 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:35:47,641 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:35:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:35:47,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053015095] [2021-06-10 14:35:47,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:35:47,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:35:47,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970513917] [2021-06-10 14:35:47,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:35:47,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:35:47,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:35:47,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:35:47,644 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 575 out of 578 [2021-06-10 14:35:47,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 959 places, 576 transitions, 38397 flow. Second operand has 3 states, 3 states have (on average 575.6666666666666) internal successors, (1727), 3 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:47,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:35:47,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 575 of 578 [2021-06-10 14:35:47,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:35:48,471 INFO L129 PetriNetUnfolder]: 0/575 cut-off events. [2021-06-10 14:35:48,471 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:48,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19487 conditions, 575 events. 0/575 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1117 event pairs, 0 based on Foata normal form. 192/767 useless extension candidates. Maximal degree in co-relation 0. Up to 192 conditions per place. [2021-06-10 14:35:48,473 INFO L132 encePairwiseOnDemand]: 576/578 looper letters, 0 selfloop transitions, 1 changer transitions 0/575 dead transitions. [2021-06-10 14:35:48,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 960 places, 575 transitions, 38397 flow [2021-06-10 14:35:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:35:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:35:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1727 transitions. [2021-06-10 14:35:48,474 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9959630911188004 [2021-06-10 14:35:48,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1727 transitions. [2021-06-10 14:35:48,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1727 transitions. [2021-06-10 14:35:48,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:35:48,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1727 transitions. [2021-06-10 14:35:48,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 575.6666666666666) internal successors, (1727), 3 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:48,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:48,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:48,476 INFO L185 Difference]: Start difference. First operand has 959 places, 576 transitions, 38397 flow. Second operand 3 states and 1727 transitions. [2021-06-10 14:35:48,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 960 places, 575 transitions, 38397 flow [2021-06-10 14:35:51,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 960 places, 575 transitions, 2107 flow, removed 18145 selfloop flow, removed 0 redundant places. [2021-06-10 14:35:51,747 INFO L241 Difference]: Finished difference. Result has 960 places, 575 transitions, 2107 flow [2021-06-10 14:35:51,747 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=958, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2107, PETRI_PLACES=960, PETRI_TRANSITIONS=575} [2021-06-10 14:35:51,747 INFO L343 CegarLoopForPetriNet]: 959 programPoint places, 1 predicate places. [2021-06-10 14:35:51,747 INFO L480 AbstractCegarLoop]: Abstraction has has 960 places, 575 transitions, 2107 flow [2021-06-10 14:35:51,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 575.6666666666666) internal successors, (1727), 3 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:51,748 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:51,748 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:35:51,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380 [2021-06-10 14:35:51,748 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:51,748 INFO L82 PathProgramCache]: Analyzing trace with hash 359830109, now seen corresponding path program 1 times [2021-06-10 14:35:51,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:51,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274199707] [2021-06-10 14:35:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:51,838 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:51,841 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:51,915 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:35:51,915 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:35:51,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381 [2021-06-10 14:35:51,915 WARN L342 ceAbstractionStarter]: 191 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:35:51,915 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 192 thread instances. [2021-06-10 14:35:52,075 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:35:52,075 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:35:52,076 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:35:52,076 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:35:52,076 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:35:52,076 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:35:52,076 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:35:52,076 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:35:52,076 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:35:52,076 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:35:52,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 966 places, 581 transitions, 38794 flow [2021-06-10 14:35:53,204 INFO L129 PetriNetUnfolder]: 0/1157 cut-off events. [2021-06-10 14:35:53,204 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:53,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20262 conditions, 1157 events. 0/1157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4467 event pairs, 0 based on Foata normal form. 0/964 useless extension candidates. Maximal degree in co-relation 0. Up to 193 conditions per place. [2021-06-10 14:35:53,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 966 places, 581 transitions, 38794 flow [2021-06-10 14:35:53,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 964 places, 579 transitions, 38790 flow [2021-06-10 14:35:53,217 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:35:53,217 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:53,217 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:53,217 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:35:53,217 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:53,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1810467, now seen corresponding path program 1 times [2021-06-10 14:35:53,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:53,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183409078] [2021-06-10 14:35:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:35:53,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:35:53,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:35:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:35:53,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183409078] [2021-06-10 14:35:53,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:35:53,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:35:53,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737226361] [2021-06-10 14:35:53,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:35:53,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:35:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:35:53,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:35:53,330 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 578 out of 581 [2021-06-10 14:35:53,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 964 places, 579 transitions, 38790 flow. Second operand has 3 states, 3 states have (on average 578.6666666666666) internal successors, (1736), 3 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:53,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:35:53,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 578 of 581 [2021-06-10 14:35:53,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:35:54,304 INFO L129 PetriNetUnfolder]: 0/578 cut-off events. [2021-06-10 14:35:54,304 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:54,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19685 conditions, 578 events. 0/578 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1073 event pairs, 0 based on Foata normal form. 193/771 useless extension candidates. Maximal degree in co-relation 0. Up to 193 conditions per place. [2021-06-10 14:35:54,306 INFO L132 encePairwiseOnDemand]: 579/581 looper letters, 0 selfloop transitions, 1 changer transitions 0/578 dead transitions. [2021-06-10 14:35:54,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 965 places, 578 transitions, 38790 flow [2021-06-10 14:35:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:35:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:35:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1736 transitions. [2021-06-10 14:35:54,307 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9959839357429718 [2021-06-10 14:35:54,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1736 transitions. [2021-06-10 14:35:54,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1736 transitions. [2021-06-10 14:35:54,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:35:54,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1736 transitions. [2021-06-10 14:35:54,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 578.6666666666666) internal successors, (1736), 3 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:54,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:54,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:54,309 INFO L185 Difference]: Start difference. First operand has 964 places, 579 transitions, 38790 flow. Second operand 3 states and 1736 transitions. [2021-06-10 14:35:54,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 965 places, 578 transitions, 38790 flow [2021-06-10 14:35:57,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 965 places, 578 transitions, 2118 flow, removed 18336 selfloop flow, removed 0 redundant places. [2021-06-10 14:35:57,482 INFO L241 Difference]: Finished difference. Result has 965 places, 578 transitions, 2118 flow [2021-06-10 14:35:57,482 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=963, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2118, PETRI_PLACES=965, PETRI_TRANSITIONS=578} [2021-06-10 14:35:57,482 INFO L343 CegarLoopForPetriNet]: 964 programPoint places, 1 predicate places. [2021-06-10 14:35:57,482 INFO L480 AbstractCegarLoop]: Abstraction has has 965 places, 578 transitions, 2118 flow [2021-06-10 14:35:57,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 578.6666666666666) internal successors, (1736), 3 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:57,482 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:57,482 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:35:57,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382 [2021-06-10 14:35:57,482 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:57,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:57,483 INFO L82 PathProgramCache]: Analyzing trace with hash -557016760, now seen corresponding path program 1 times [2021-06-10 14:35:57,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:57,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061054785] [2021-06-10 14:35:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:57,594 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:35:57,597 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:35:57,672 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:35:57,672 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:35:57,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383 [2021-06-10 14:35:57,672 WARN L342 ceAbstractionStarter]: 192 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:35:57,672 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 193 thread instances. [2021-06-10 14:35:57,969 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:35:57,969 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:35:57,969 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:35:57,969 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:35:57,969 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:35:57,969 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:35:57,969 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:35:57,969 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:35:57,969 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:35:57,969 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:35:57,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 971 places, 584 transitions, 39189 flow [2021-06-10 14:35:58,880 INFO L129 PetriNetUnfolder]: 0/1163 cut-off events. [2021-06-10 14:35:58,881 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:58,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20464 conditions, 1163 events. 0/1163 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4641 event pairs, 0 based on Foata normal form. 0/969 useless extension candidates. Maximal degree in co-relation 0. Up to 194 conditions per place. [2021-06-10 14:35:58,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 971 places, 584 transitions, 39189 flow [2021-06-10 14:35:58,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 969 places, 582 transitions, 39185 flow [2021-06-10 14:35:58,894 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:35:58,894 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:58,894 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:35:58,894 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:35:58,894 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:35:58,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:35:58,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1829155, now seen corresponding path program 1 times [2021-06-10 14:35:58,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:35:58,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690528147] [2021-06-10 14:35:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:35:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:35:59,039 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:35:59,039 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:35:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:35:59,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690528147] [2021-06-10 14:35:59,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:35:59,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:35:59,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110080778] [2021-06-10 14:35:59,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:35:59,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:35:59,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:35:59,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:35:59,042 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 581 out of 584 [2021-06-10 14:35:59,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 582 transitions, 39185 flow. Second operand has 3 states, 3 states have (on average 581.6666666666666) internal successors, (1745), 3 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:59,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:35:59,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 581 of 584 [2021-06-10 14:35:59,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:35:59,743 INFO L129 PetriNetUnfolder]: 0/581 cut-off events. [2021-06-10 14:35:59,743 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:35:59,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19884 conditions, 581 events. 0/581 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1149 event pairs, 0 based on Foata normal form. 194/775 useless extension candidates. Maximal degree in co-relation 0. Up to 194 conditions per place. [2021-06-10 14:35:59,745 INFO L132 encePairwiseOnDemand]: 582/584 looper letters, 0 selfloop transitions, 1 changer transitions 0/581 dead transitions. [2021-06-10 14:35:59,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 970 places, 581 transitions, 39185 flow [2021-06-10 14:35:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:35:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:35:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1745 transitions. [2021-06-10 14:35:59,745 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9960045662100456 [2021-06-10 14:35:59,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1745 transitions. [2021-06-10 14:35:59,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1745 transitions. [2021-06-10 14:35:59,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:35:59,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1745 transitions. [2021-06-10 14:35:59,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 581.6666666666666) internal successors, (1745), 3 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:59,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 584.0) internal successors, (2336), 4 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:59,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 584.0) internal successors, (2336), 4 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:35:59,747 INFO L185 Difference]: Start difference. First operand has 969 places, 582 transitions, 39185 flow. Second operand 3 states and 1745 transitions. [2021-06-10 14:35:59,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 970 places, 581 transitions, 39185 flow [2021-06-10 14:36:03,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 970 places, 581 transitions, 2129 flow, removed 18528 selfloop flow, removed 0 redundant places. [2021-06-10 14:36:03,210 INFO L241 Difference]: Finished difference. Result has 970 places, 581 transitions, 2129 flow [2021-06-10 14:36:03,210 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=584, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=968, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2129, PETRI_PLACES=970, PETRI_TRANSITIONS=581} [2021-06-10 14:36:03,210 INFO L343 CegarLoopForPetriNet]: 969 programPoint places, 1 predicate places. [2021-06-10 14:36:03,210 INFO L480 AbstractCegarLoop]: Abstraction has has 970 places, 581 transitions, 2129 flow [2021-06-10 14:36:03,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 581.6666666666666) internal successors, (1745), 3 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:03,211 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:03,211 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:36:03,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384 [2021-06-10 14:36:03,211 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:03,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:03,211 INFO L82 PathProgramCache]: Analyzing trace with hash -543549687, now seen corresponding path program 1 times [2021-06-10 14:36:03,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:03,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200027105] [2021-06-10 14:36:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:03,327 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:03,330 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:03,410 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:36:03,410 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:36:03,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385 [2021-06-10 14:36:03,411 WARN L342 ceAbstractionStarter]: 193 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:36:03,411 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 194 thread instances. [2021-06-10 14:36:03,553 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:36:03,553 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:36:03,553 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:36:03,553 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:36:03,553 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:36:03,553 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:36:03,553 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:36:03,553 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:36:03,553 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:36:03,553 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:36:03,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 976 places, 587 transitions, 39586 flow [2021-06-10 14:36:04,673 INFO L129 PetriNetUnfolder]: 0/1169 cut-off events. [2021-06-10 14:36:04,673 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:04,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20667 conditions, 1169 events. 0/1169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4585 event pairs, 0 based on Foata normal form. 0/974 useless extension candidates. Maximal degree in co-relation 0. Up to 195 conditions per place. [2021-06-10 14:36:04,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 976 places, 587 transitions, 39586 flow [2021-06-10 14:36:04,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 974 places, 585 transitions, 39582 flow [2021-06-10 14:36:04,685 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:36:04,686 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:04,686 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:04,686 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:36:04,686 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:04,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:04,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1847939, now seen corresponding path program 1 times [2021-06-10 14:36:04,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:04,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246451880] [2021-06-10 14:36:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:36:04,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:36:04,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:36:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:36:04,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246451880] [2021-06-10 14:36:04,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:36:04,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:36:04,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143227484] [2021-06-10 14:36:04,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:36:04,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:36:04,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:36:04,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:36:04,799 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 584 out of 587 [2021-06-10 14:36:04,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 974 places, 585 transitions, 39582 flow. Second operand has 3 states, 3 states have (on average 584.6666666666666) internal successors, (1754), 3 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:04,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:36:04,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 584 of 587 [2021-06-10 14:36:04,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:36:05,687 INFO L129 PetriNetUnfolder]: 0/584 cut-off events. [2021-06-10 14:36:05,687 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:05,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20084 conditions, 584 events. 0/584 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1279 event pairs, 0 based on Foata normal form. 195/779 useless extension candidates. Maximal degree in co-relation 0. Up to 195 conditions per place. [2021-06-10 14:36:05,689 INFO L132 encePairwiseOnDemand]: 585/587 looper letters, 0 selfloop transitions, 1 changer transitions 0/584 dead transitions. [2021-06-10 14:36:05,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 975 places, 584 transitions, 39582 flow [2021-06-10 14:36:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:36:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:36:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1754 transitions. [2021-06-10 14:36:05,690 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9960249858035207 [2021-06-10 14:36:05,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1754 transitions. [2021-06-10 14:36:05,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1754 transitions. [2021-06-10 14:36:05,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:36:05,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1754 transitions. [2021-06-10 14:36:05,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 584.6666666666666) internal successors, (1754), 3 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:05,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 587.0) internal successors, (2348), 4 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:05,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 587.0) internal successors, (2348), 4 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:05,691 INFO L185 Difference]: Start difference. First operand has 974 places, 585 transitions, 39582 flow. Second operand 3 states and 1754 transitions. [2021-06-10 14:36:05,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 975 places, 584 transitions, 39582 flow [2021-06-10 14:36:09,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 975 places, 584 transitions, 2140 flow, removed 18721 selfloop flow, removed 0 redundant places. [2021-06-10 14:36:09,080 INFO L241 Difference]: Finished difference. Result has 975 places, 584 transitions, 2140 flow [2021-06-10 14:36:09,080 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=973, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2140, PETRI_PLACES=975, PETRI_TRANSITIONS=584} [2021-06-10 14:36:09,080 INFO L343 CegarLoopForPetriNet]: 974 programPoint places, 1 predicate places. [2021-06-10 14:36:09,080 INFO L480 AbstractCegarLoop]: Abstraction has has 975 places, 584 transitions, 2140 flow [2021-06-10 14:36:09,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 584.6666666666666) internal successors, (1754), 3 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:09,080 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:09,080 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:36:09,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386 [2021-06-10 14:36:09,080 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:09,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:09,080 INFO L82 PathProgramCache]: Analyzing trace with hash 67465419, now seen corresponding path program 1 times [2021-06-10 14:36:09,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:09,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129303513] [2021-06-10 14:36:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:09,190 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:09,193 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:09,269 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:36:09,269 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:36:09,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387 [2021-06-10 14:36:09,270 WARN L342 ceAbstractionStarter]: 194 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:36:09,270 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 195 thread instances. [2021-06-10 14:36:09,411 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:36:09,411 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:36:09,411 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:36:09,411 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:36:09,411 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:36:09,411 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:36:09,411 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:36:09,411 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:36:09,411 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:36:09,411 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:36:09,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 981 places, 590 transitions, 39985 flow [2021-06-10 14:36:10,553 INFO L129 PetriNetUnfolder]: 0/1175 cut-off events. [2021-06-10 14:36:10,554 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:10,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20871 conditions, 1175 events. 0/1175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4689 event pairs, 0 based on Foata normal form. 0/979 useless extension candidates. Maximal degree in co-relation 0. Up to 196 conditions per place. [2021-06-10 14:36:10,554 INFO L82 GeneralOperation]: Start removeDead. Operand has 981 places, 590 transitions, 39985 flow [2021-06-10 14:36:10,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 979 places, 588 transitions, 39981 flow [2021-06-10 14:36:10,566 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:36:10,566 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:10,566 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:10,566 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:36:10,567 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:10,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1866819, now seen corresponding path program 1 times [2021-06-10 14:36:10,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:10,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274690094] [2021-06-10 14:36:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:36:10,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:36:10,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:36:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:36:10,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274690094] [2021-06-10 14:36:10,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:36:10,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:36:10,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041569183] [2021-06-10 14:36:10,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:36:10,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:36:10,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:36:10,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:36:10,677 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 587 out of 590 [2021-06-10 14:36:10,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 979 places, 588 transitions, 39981 flow. Second operand has 3 states, 3 states have (on average 587.6666666666666) internal successors, (1763), 3 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:10,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:36:10,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 587 of 590 [2021-06-10 14:36:10,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:36:11,663 INFO L129 PetriNetUnfolder]: 0/587 cut-off events. [2021-06-10 14:36:11,663 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:11,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20285 conditions, 587 events. 0/587 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1180 event pairs, 0 based on Foata normal form. 196/783 useless extension candidates. Maximal degree in co-relation 0. Up to 196 conditions per place. [2021-06-10 14:36:11,665 INFO L132 encePairwiseOnDemand]: 588/590 looper letters, 0 selfloop transitions, 1 changer transitions 0/587 dead transitions. [2021-06-10 14:36:11,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 980 places, 587 transitions, 39981 flow [2021-06-10 14:36:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:36:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:36:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1763 transitions. [2021-06-10 14:36:11,666 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.996045197740113 [2021-06-10 14:36:11,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1763 transitions. [2021-06-10 14:36:11,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1763 transitions. [2021-06-10 14:36:11,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:36:11,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1763 transitions. [2021-06-10 14:36:11,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 587.6666666666666) internal successors, (1763), 3 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:11,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:11,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:11,668 INFO L185 Difference]: Start difference. First operand has 979 places, 588 transitions, 39981 flow. Second operand 3 states and 1763 transitions. [2021-06-10 14:36:11,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 980 places, 587 transitions, 39981 flow [2021-06-10 14:36:14,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 980 places, 587 transitions, 2151 flow, removed 18915 selfloop flow, removed 0 redundant places. [2021-06-10 14:36:14,970 INFO L241 Difference]: Finished difference. Result has 980 places, 587 transitions, 2151 flow [2021-06-10 14:36:14,970 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=978, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2151, PETRI_PLACES=980, PETRI_TRANSITIONS=587} [2021-06-10 14:36:14,970 INFO L343 CegarLoopForPetriNet]: 979 programPoint places, 1 predicate places. [2021-06-10 14:36:14,970 INFO L480 AbstractCegarLoop]: Abstraction has has 980 places, 587 transitions, 2151 flow [2021-06-10 14:36:14,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 587.6666666666666) internal successors, (1763), 3 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:14,970 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:14,970 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:36:14,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388 [2021-06-10 14:36:14,970 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:14,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1201057151, now seen corresponding path program 1 times [2021-06-10 14:36:14,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:14,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50178740] [2021-06-10 14:36:14,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:15,187 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:15,190 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:15,255 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:36:15,255 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:36:15,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable389 [2021-06-10 14:36:15,255 WARN L342 ceAbstractionStarter]: 195 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:36:15,255 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 196 thread instances. [2021-06-10 14:36:15,397 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:36:15,397 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:36:15,397 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:36:15,397 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:36:15,397 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:36:15,397 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:36:15,397 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:36:15,397 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:36:15,397 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:36:15,397 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:36:15,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 986 places, 593 transitions, 40386 flow [2021-06-10 14:36:16,572 INFO L129 PetriNetUnfolder]: 0/1181 cut-off events. [2021-06-10 14:36:16,572 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:16,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21076 conditions, 1181 events. 0/1181 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4628 event pairs, 0 based on Foata normal form. 0/984 useless extension candidates. Maximal degree in co-relation 0. Up to 197 conditions per place. [2021-06-10 14:36:16,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 986 places, 593 transitions, 40386 flow [2021-06-10 14:36:16,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 984 places, 591 transitions, 40382 flow [2021-06-10 14:36:16,586 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:36:16,586 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:16,586 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:16,586 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:36:16,586 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:16,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:16,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1885795, now seen corresponding path program 1 times [2021-06-10 14:36:16,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:16,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920631141] [2021-06-10 14:36:16,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:36:16,737 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:36:16,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:36:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:36:16,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920631141] [2021-06-10 14:36:16,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:36:16,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:36:16,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236654367] [2021-06-10 14:36:16,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:36:16,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:36:16,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:36:16,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:36:16,740 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 590 out of 593 [2021-06-10 14:36:16,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 984 places, 591 transitions, 40382 flow. Second operand has 3 states, 3 states have (on average 590.6666666666666) internal successors, (1772), 3 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:16,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:36:16,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 590 of 593 [2021-06-10 14:36:16,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:36:17,879 INFO L129 PetriNetUnfolder]: 0/590 cut-off events. [2021-06-10 14:36:17,879 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:17,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20487 conditions, 590 events. 0/590 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1134 event pairs, 0 based on Foata normal form. 197/787 useless extension candidates. Maximal degree in co-relation 0. Up to 197 conditions per place. [2021-06-10 14:36:17,882 INFO L132 encePairwiseOnDemand]: 591/593 looper letters, 0 selfloop transitions, 1 changer transitions 0/590 dead transitions. [2021-06-10 14:36:17,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 985 places, 590 transitions, 40382 flow [2021-06-10 14:36:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:36:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:36:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1772 transitions. [2021-06-10 14:36:17,883 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9960652051714446 [2021-06-10 14:36:17,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1772 transitions. [2021-06-10 14:36:17,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1772 transitions. [2021-06-10 14:36:17,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:36:17,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1772 transitions. [2021-06-10 14:36:17,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 590.6666666666666) internal successors, (1772), 3 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:17,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:17,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:17,885 INFO L185 Difference]: Start difference. First operand has 984 places, 591 transitions, 40382 flow. Second operand 3 states and 1772 transitions. [2021-06-10 14:36:17,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 985 places, 590 transitions, 40382 flow [2021-06-10 14:36:21,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 985 places, 590 transitions, 2162 flow, removed 19110 selfloop flow, removed 0 redundant places. [2021-06-10 14:36:21,204 INFO L241 Difference]: Finished difference. Result has 985 places, 590 transitions, 2162 flow [2021-06-10 14:36:21,204 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=983, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2162, PETRI_PLACES=985, PETRI_TRANSITIONS=590} [2021-06-10 14:36:21,204 INFO L343 CegarLoopForPetriNet]: 984 programPoint places, 1 predicate places. [2021-06-10 14:36:21,205 INFO L480 AbstractCegarLoop]: Abstraction has has 985 places, 590 transitions, 2162 flow [2021-06-10 14:36:21,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 590.6666666666666) internal successors, (1772), 3 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:21,205 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:21,205 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:36:21,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390 [2021-06-10 14:36:21,205 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:21,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:21,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2063330162, now seen corresponding path program 1 times [2021-06-10 14:36:21,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:21,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84365932] [2021-06-10 14:36:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:21,316 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:21,319 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:21,398 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:36:21,398 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:36:21,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391 [2021-06-10 14:36:21,398 WARN L342 ceAbstractionStarter]: 196 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:36:21,398 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 197 thread instances. [2021-06-10 14:36:21,543 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:36:21,543 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:36:21,544 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:36:21,544 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:36:21,544 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:36:21,544 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:36:21,544 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:36:21,544 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:36:21,544 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:36:21,544 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:36:21,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 991 places, 596 transitions, 40789 flow [2021-06-10 14:36:22,708 INFO L129 PetriNetUnfolder]: 0/1187 cut-off events. [2021-06-10 14:36:22,708 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:22,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21282 conditions, 1187 events. 0/1187 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4614 event pairs, 0 based on Foata normal form. 0/989 useless extension candidates. Maximal degree in co-relation 0. Up to 198 conditions per place. [2021-06-10 14:36:22,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 991 places, 596 transitions, 40789 flow [2021-06-10 14:36:22,721 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 989 places, 594 transitions, 40785 flow [2021-06-10 14:36:22,722 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:36:22,722 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:22,722 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:22,722 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:36:22,722 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:22,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:22,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1904867, now seen corresponding path program 1 times [2021-06-10 14:36:22,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:22,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184197183] [2021-06-10 14:36:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:36:22,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:36:22,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:36:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:36:22,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184197183] [2021-06-10 14:36:22,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:36:22,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:36:22,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890864171] [2021-06-10 14:36:22,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:36:22,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:36:22,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:36:22,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:36:22,845 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 593 out of 596 [2021-06-10 14:36:22,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 989 places, 594 transitions, 40785 flow. Second operand has 3 states, 3 states have (on average 593.6666666666666) internal successors, (1781), 3 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:22,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:36:22,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 593 of 596 [2021-06-10 14:36:22,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:36:23,672 INFO L129 PetriNetUnfolder]: 0/593 cut-off events. [2021-06-10 14:36:23,672 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:23,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20690 conditions, 593 events. 0/593 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1199 event pairs, 0 based on Foata normal form. 198/791 useless extension candidates. Maximal degree in co-relation 0. Up to 198 conditions per place. [2021-06-10 14:36:23,674 INFO L132 encePairwiseOnDemand]: 594/596 looper letters, 0 selfloop transitions, 1 changer transitions 0/593 dead transitions. [2021-06-10 14:36:23,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 990 places, 593 transitions, 40785 flow [2021-06-10 14:36:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:36:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:36:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1781 transitions. [2021-06-10 14:36:23,675 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9960850111856824 [2021-06-10 14:36:23,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1781 transitions. [2021-06-10 14:36:23,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1781 transitions. [2021-06-10 14:36:23,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:36:23,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1781 transitions. [2021-06-10 14:36:23,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 593.6666666666666) internal successors, (1781), 3 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:23,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 596.0) internal successors, (2384), 4 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:23,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 596.0) internal successors, (2384), 4 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:23,677 INFO L185 Difference]: Start difference. First operand has 989 places, 594 transitions, 40785 flow. Second operand 3 states and 1781 transitions. [2021-06-10 14:36:23,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 990 places, 593 transitions, 40785 flow [2021-06-10 14:36:27,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 990 places, 593 transitions, 2173 flow, removed 19306 selfloop flow, removed 0 redundant places. [2021-06-10 14:36:27,061 INFO L241 Difference]: Finished difference. Result has 990 places, 593 transitions, 2173 flow [2021-06-10 14:36:27,062 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=596, PETRI_DIFFERENCE_MINUEND_FLOW=2171, PETRI_DIFFERENCE_MINUEND_PLACES=988, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2173, PETRI_PLACES=990, PETRI_TRANSITIONS=593} [2021-06-10 14:36:27,062 INFO L343 CegarLoopForPetriNet]: 989 programPoint places, 1 predicate places. [2021-06-10 14:36:27,062 INFO L480 AbstractCegarLoop]: Abstraction has has 990 places, 593 transitions, 2173 flow [2021-06-10 14:36:27,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 593.6666666666666) internal successors, (1781), 3 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:27,062 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:27,062 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:36:27,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392 [2021-06-10 14:36:27,062 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:27,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:27,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2131728315, now seen corresponding path program 1 times [2021-06-10 14:36:27,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:27,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170681935] [2021-06-10 14:36:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:27,174 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:27,177 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:27,254 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:36:27,255 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:36:27,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393 [2021-06-10 14:36:27,255 WARN L342 ceAbstractionStarter]: 197 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:36:27,255 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 198 thread instances. [2021-06-10 14:36:27,399 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:36:27,399 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:36:27,400 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:36:27,400 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:36:27,400 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:36:27,400 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:36:27,400 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:36:27,400 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:36:27,400 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:36:27,400 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:36:27,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 996 places, 599 transitions, 41194 flow [2021-06-10 14:36:28,613 INFO L129 PetriNetUnfolder]: 0/1193 cut-off events. [2021-06-10 14:36:28,613 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:28,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21489 conditions, 1193 events. 0/1193 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4649 event pairs, 0 based on Foata normal form. 0/994 useless extension candidates. Maximal degree in co-relation 0. Up to 199 conditions per place. [2021-06-10 14:36:28,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 996 places, 599 transitions, 41194 flow [2021-06-10 14:36:28,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 994 places, 597 transitions, 41190 flow [2021-06-10 14:36:28,626 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:36:28,626 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:28,626 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:28,626 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:36:28,626 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:28,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1924035, now seen corresponding path program 1 times [2021-06-10 14:36:28,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:28,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687717894] [2021-06-10 14:36:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:36:28,740 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:36:28,740 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:36:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:36:28,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687717894] [2021-06-10 14:36:28,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:36:28,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:36:28,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931991952] [2021-06-10 14:36:28,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:36:28,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:36:28,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:36:28,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:36:28,743 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 596 out of 599 [2021-06-10 14:36:28,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 994 places, 597 transitions, 41190 flow. Second operand has 3 states, 3 states have (on average 596.6666666666666) internal successors, (1790), 3 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:28,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:36:28,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 596 of 599 [2021-06-10 14:36:28,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:36:29,905 INFO L129 PetriNetUnfolder]: 0/596 cut-off events. [2021-06-10 14:36:29,905 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:29,906 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20894 conditions, 596 events. 0/596 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1193 event pairs, 0 based on Foata normal form. 199/795 useless extension candidates. Maximal degree in co-relation 0. Up to 199 conditions per place. [2021-06-10 14:36:29,907 INFO L132 encePairwiseOnDemand]: 597/599 looper letters, 0 selfloop transitions, 1 changer transitions 0/596 dead transitions. [2021-06-10 14:36:29,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 596 transitions, 41190 flow [2021-06-10 14:36:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:36:29,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:36:29,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1790 transitions. [2021-06-10 14:36:29,908 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9961046188091264 [2021-06-10 14:36:29,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1790 transitions. [2021-06-10 14:36:29,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1790 transitions. [2021-06-10 14:36:29,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:36:29,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1790 transitions. [2021-06-10 14:36:29,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 596.6666666666666) internal successors, (1790), 3 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:29,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 599.0) internal successors, (2396), 4 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:29,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 599.0) internal successors, (2396), 4 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:29,910 INFO L185 Difference]: Start difference. First operand has 994 places, 597 transitions, 41190 flow. Second operand 3 states and 1790 transitions. [2021-06-10 14:36:29,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 596 transitions, 41190 flow [2021-06-10 14:36:33,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 995 places, 596 transitions, 2184 flow, removed 19503 selfloop flow, removed 0 redundant places. [2021-06-10 14:36:33,362 INFO L241 Difference]: Finished difference. Result has 995 places, 596 transitions, 2184 flow [2021-06-10 14:36:33,362 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=599, PETRI_DIFFERENCE_MINUEND_FLOW=2182, PETRI_DIFFERENCE_MINUEND_PLACES=993, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2184, PETRI_PLACES=995, PETRI_TRANSITIONS=596} [2021-06-10 14:36:33,362 INFO L343 CegarLoopForPetriNet]: 994 programPoint places, 1 predicate places. [2021-06-10 14:36:33,362 INFO L480 AbstractCegarLoop]: Abstraction has has 995 places, 596 transitions, 2184 flow [2021-06-10 14:36:33,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 596.6666666666666) internal successors, (1790), 3 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:33,362 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:33,363 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:36:33,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394 [2021-06-10 14:36:33,363 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:33,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:33,363 INFO L82 PathProgramCache]: Analyzing trace with hash 106119441, now seen corresponding path program 1 times [2021-06-10 14:36:33,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:33,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517140835] [2021-06-10 14:36:33,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:33,483 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:33,486 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:33,565 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:36:33,565 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:36:33,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395 [2021-06-10 14:36:33,565 WARN L342 ceAbstractionStarter]: 198 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:36:33,565 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 199 thread instances. [2021-06-10 14:36:33,709 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:36:33,710 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:36:33,710 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:36:33,710 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:36:33,710 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:36:33,710 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:36:33,710 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:36:33,710 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:36:33,710 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:36:33,710 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:36:33,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1001 places, 602 transitions, 41601 flow [2021-06-10 14:36:34,988 INFO L129 PetriNetUnfolder]: 0/1199 cut-off events. [2021-06-10 14:36:34,988 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:34,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21697 conditions, 1199 events. 0/1199 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4775 event pairs, 0 based on Foata normal form. 0/999 useless extension candidates. Maximal degree in co-relation 0. Up to 200 conditions per place. [2021-06-10 14:36:34,988 INFO L82 GeneralOperation]: Start removeDead. Operand has 1001 places, 602 transitions, 41601 flow [2021-06-10 14:36:35,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 999 places, 600 transitions, 41597 flow [2021-06-10 14:36:35,002 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:36:35,002 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:35,002 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:35,002 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:36:35,002 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:35,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:35,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1943299, now seen corresponding path program 1 times [2021-06-10 14:36:35,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:35,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354577249] [2021-06-10 14:36:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:36:35,260 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:36:35,260 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:36:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:36:35,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354577249] [2021-06-10 14:36:35,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:36:35,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:36:35,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849505023] [2021-06-10 14:36:35,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:36:35,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:36:35,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:36:35,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:36:35,264 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 599 out of 602 [2021-06-10 14:36:35,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 999 places, 600 transitions, 41597 flow. Second operand has 3 states, 3 states have (on average 599.6666666666666) internal successors, (1799), 3 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:35,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:36:35,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 599 of 602 [2021-06-10 14:36:35,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:36:36,236 INFO L129 PetriNetUnfolder]: 0/599 cut-off events. [2021-06-10 14:36:36,237 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:36,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21099 conditions, 599 events. 0/599 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1191 event pairs, 0 based on Foata normal form. 200/799 useless extension candidates. Maximal degree in co-relation 0. Up to 200 conditions per place. [2021-06-10 14:36:36,238 INFO L132 encePairwiseOnDemand]: 600/602 looper letters, 0 selfloop transitions, 1 changer transitions 0/599 dead transitions. [2021-06-10 14:36:36,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1000 places, 599 transitions, 41597 flow [2021-06-10 14:36:36,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:36:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:36:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1799 transitions. [2021-06-10 14:36:36,239 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9961240310077519 [2021-06-10 14:36:36,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1799 transitions. [2021-06-10 14:36:36,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1799 transitions. [2021-06-10 14:36:36,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:36:36,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1799 transitions. [2021-06-10 14:36:36,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 599.6666666666666) internal successors, (1799), 3 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:36,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 602.0) internal successors, (2408), 4 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:36,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 602.0) internal successors, (2408), 4 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:36,241 INFO L185 Difference]: Start difference. First operand has 999 places, 600 transitions, 41597 flow. Second operand 3 states and 1799 transitions. [2021-06-10 14:36:36,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1000 places, 599 transitions, 41597 flow [2021-06-10 14:36:39,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1000 places, 599 transitions, 2195 flow, removed 19701 selfloop flow, removed 0 redundant places. [2021-06-10 14:36:39,769 INFO L241 Difference]: Finished difference. Result has 1000 places, 599 transitions, 2195 flow [2021-06-10 14:36:39,769 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=602, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=998, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2195, PETRI_PLACES=1000, PETRI_TRANSITIONS=599} [2021-06-10 14:36:39,769 INFO L343 CegarLoopForPetriNet]: 999 programPoint places, 1 predicate places. [2021-06-10 14:36:39,769 INFO L480 AbstractCegarLoop]: Abstraction has has 1000 places, 599 transitions, 2195 flow [2021-06-10 14:36:39,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 599.6666666666666) internal successors, (1799), 3 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:39,769 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:39,769 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:36:39,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396 [2021-06-10 14:36:39,769 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:39,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:39,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1915599829, now seen corresponding path program 1 times [2021-06-10 14:36:39,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:39,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633347403] [2021-06-10 14:36:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:39,882 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:39,884 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:39,964 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:36:39,965 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:36:39,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397 [2021-06-10 14:36:39,965 WARN L342 ceAbstractionStarter]: 199 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:36:39,965 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 200 thread instances. [2021-06-10 14:36:40,111 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:36:40,112 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:36:40,112 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:36:40,112 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:36:40,112 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:36:40,112 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:36:40,112 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:36:40,112 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:36:40,112 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:36:40,112 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:36:40,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1006 places, 605 transitions, 42010 flow [2021-06-10 14:36:41,348 INFO L129 PetriNetUnfolder]: 0/1205 cut-off events. [2021-06-10 14:36:41,348 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:41,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21906 conditions, 1205 events. 0/1205 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4696 event pairs, 0 based on Foata normal form. 0/1004 useless extension candidates. Maximal degree in co-relation 0. Up to 201 conditions per place. [2021-06-10 14:36:41,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 1006 places, 605 transitions, 42010 flow [2021-06-10 14:36:41,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1004 places, 603 transitions, 42006 flow [2021-06-10 14:36:41,361 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:36:41,362 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:41,362 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:41,362 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:36:41,362 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:41,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1962659, now seen corresponding path program 1 times [2021-06-10 14:36:41,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:41,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11520981] [2021-06-10 14:36:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:36:41,476 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:36:41,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:36:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:36:41,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11520981] [2021-06-10 14:36:41,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:36:41,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:36:41,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796403657] [2021-06-10 14:36:41,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:36:41,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:36:41,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:36:41,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:36:41,479 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 602 out of 605 [2021-06-10 14:36:41,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1004 places, 603 transitions, 42006 flow. Second operand has 3 states, 3 states have (on average 602.6666666666666) internal successors, (1808), 3 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:41,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:36:41,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 602 of 605 [2021-06-10 14:36:41,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:36:42,431 INFO L129 PetriNetUnfolder]: 0/602 cut-off events. [2021-06-10 14:36:42,432 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:42,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21305 conditions, 602 events. 0/602 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1347 event pairs, 0 based on Foata normal form. 201/803 useless extension candidates. Maximal degree in co-relation 0. Up to 201 conditions per place. [2021-06-10 14:36:42,433 INFO L132 encePairwiseOnDemand]: 603/605 looper letters, 0 selfloop transitions, 1 changer transitions 0/602 dead transitions. [2021-06-10 14:36:42,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1005 places, 602 transitions, 42006 flow [2021-06-10 14:36:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:36:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:36:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1808 transitions. [2021-06-10 14:36:42,434 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9961432506887052 [2021-06-10 14:36:42,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1808 transitions. [2021-06-10 14:36:42,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1808 transitions. [2021-06-10 14:36:42,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:36:42,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1808 transitions. [2021-06-10 14:36:42,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 602.6666666666666) internal successors, (1808), 3 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:42,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 605.0) internal successors, (2420), 4 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:42,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 605.0) internal successors, (2420), 4 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:42,436 INFO L185 Difference]: Start difference. First operand has 1004 places, 603 transitions, 42006 flow. Second operand 3 states and 1808 transitions. [2021-06-10 14:36:42,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1005 places, 602 transitions, 42006 flow [2021-06-10 14:36:45,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1005 places, 602 transitions, 2206 flow, removed 19900 selfloop flow, removed 0 redundant places. [2021-06-10 14:36:45,943 INFO L241 Difference]: Finished difference. Result has 1005 places, 602 transitions, 2206 flow [2021-06-10 14:36:45,943 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=605, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=1003, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2206, PETRI_PLACES=1005, PETRI_TRANSITIONS=602} [2021-06-10 14:36:45,943 INFO L343 CegarLoopForPetriNet]: 1004 programPoint places, 1 predicate places. [2021-06-10 14:36:45,943 INFO L480 AbstractCegarLoop]: Abstraction has has 1005 places, 602 transitions, 2206 flow [2021-06-10 14:36:45,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 602.6666666666666) internal successors, (1808), 3 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:45,943 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:45,943 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:36:45,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398 [2021-06-10 14:36:45,943 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:45,944 INFO L82 PathProgramCache]: Analyzing trace with hash 185037524, now seen corresponding path program 1 times [2021-06-10 14:36:45,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:45,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016872382] [2021-06-10 14:36:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:46,061 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:46,064 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:46,145 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:36:46,145 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:36:46,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399 [2021-06-10 14:36:46,145 WARN L342 ceAbstractionStarter]: 200 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:36:46,145 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 201 thread instances. [2021-06-10 14:36:46,295 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:36:46,295 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:36:46,296 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:36:46,296 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:36:46,296 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:36:46,296 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:36:46,296 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:36:46,296 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:36:46,296 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:36:46,296 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:36:46,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1011 places, 608 transitions, 42421 flow [2021-06-10 14:36:47,565 INFO L129 PetriNetUnfolder]: 0/1211 cut-off events. [2021-06-10 14:36:47,565 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:47,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22116 conditions, 1211 events. 0/1211 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4707 event pairs, 0 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 0. Up to 202 conditions per place. [2021-06-10 14:36:47,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 1011 places, 608 transitions, 42421 flow [2021-06-10 14:36:47,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1009 places, 606 transitions, 42417 flow [2021-06-10 14:36:47,579 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:36:47,579 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:47,579 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:47,579 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:36:47,579 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:47,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1982115, now seen corresponding path program 1 times [2021-06-10 14:36:47,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:47,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419526691] [2021-06-10 14:36:47,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:36:47,690 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:36:47,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:36:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:36:47,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419526691] [2021-06-10 14:36:47,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:36:47,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:36:47,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992474289] [2021-06-10 14:36:47,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:36:47,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:36:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:36:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:36:47,693 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 605 out of 608 [2021-06-10 14:36:47,694 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1009 places, 606 transitions, 42417 flow. Second operand has 3 states, 3 states have (on average 605.6666666666666) internal successors, (1817), 3 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:47,694 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:36:47,694 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 605 of 608 [2021-06-10 14:36:47,694 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:36:48,742 INFO L129 PetriNetUnfolder]: 0/605 cut-off events. [2021-06-10 14:36:48,742 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:48,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21512 conditions, 605 events. 0/605 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1196 event pairs, 0 based on Foata normal form. 202/807 useless extension candidates. Maximal degree in co-relation 0. Up to 202 conditions per place. [2021-06-10 14:36:48,744 INFO L132 encePairwiseOnDemand]: 606/608 looper letters, 0 selfloop transitions, 1 changer transitions 0/605 dead transitions. [2021-06-10 14:36:48,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1010 places, 605 transitions, 42417 flow [2021-06-10 14:36:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:36:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:36:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1817 transitions. [2021-06-10 14:36:48,745 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9961622807017544 [2021-06-10 14:36:48,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1817 transitions. [2021-06-10 14:36:48,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1817 transitions. [2021-06-10 14:36:48,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:36:48,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1817 transitions. [2021-06-10 14:36:48,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 605.6666666666666) internal successors, (1817), 3 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:48,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 608.0) internal successors, (2432), 4 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:48,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 608.0) internal successors, (2432), 4 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:48,747 INFO L185 Difference]: Start difference. First operand has 1009 places, 606 transitions, 42417 flow. Second operand 3 states and 1817 transitions. [2021-06-10 14:36:48,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1010 places, 605 transitions, 42417 flow [2021-06-10 14:36:52,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1010 places, 605 transitions, 2217 flow, removed 20100 selfloop flow, removed 0 redundant places. [2021-06-10 14:36:52,051 INFO L241 Difference]: Finished difference. Result has 1010 places, 605 transitions, 2217 flow [2021-06-10 14:36:52,051 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=608, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=1008, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2217, PETRI_PLACES=1010, PETRI_TRANSITIONS=605} [2021-06-10 14:36:52,051 INFO L343 CegarLoopForPetriNet]: 1009 programPoint places, 1 predicate places. [2021-06-10 14:36:52,051 INFO L480 AbstractCegarLoop]: Abstraction has has 1010 places, 605 transitions, 2217 flow [2021-06-10 14:36:52,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 605.6666666666666) internal successors, (1817), 3 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:52,051 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:52,051 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:36:52,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400 [2021-06-10 14:36:52,051 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:52,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:52,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1050538161, now seen corresponding path program 1 times [2021-06-10 14:36:52,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:52,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15855523] [2021-06-10 14:36:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:52,261 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:52,264 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:52,342 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:36:52,343 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:36:52,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401 [2021-06-10 14:36:52,343 WARN L342 ceAbstractionStarter]: 201 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:36:52,343 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 202 thread instances. [2021-06-10 14:36:52,491 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:36:52,492 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:36:52,492 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:36:52,492 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:36:52,492 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:36:52,492 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:36:52,492 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:36:52,492 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:36:52,492 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:36:52,492 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:36:52,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1016 places, 611 transitions, 42834 flow [2021-06-10 14:36:53,826 INFO L129 PetriNetUnfolder]: 0/1217 cut-off events. [2021-06-10 14:36:53,826 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:53,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22327 conditions, 1217 events. 0/1217 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4833 event pairs, 0 based on Foata normal form. 0/1014 useless extension candidates. Maximal degree in co-relation 0. Up to 203 conditions per place. [2021-06-10 14:36:53,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 1016 places, 611 transitions, 42834 flow [2021-06-10 14:36:53,840 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1014 places, 609 transitions, 42830 flow [2021-06-10 14:36:53,841 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:36:53,841 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:53,841 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:53,841 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:36:53,841 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:53,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2001667, now seen corresponding path program 1 times [2021-06-10 14:36:53,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:53,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293169666] [2021-06-10 14:36:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:36:53,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:36:53,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:36:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:36:53,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293169666] [2021-06-10 14:36:53,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:36:53,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:36:53,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701638455] [2021-06-10 14:36:53,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:36:53,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:36:53,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:36:53,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:36:53,959 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 608 out of 611 [2021-06-10 14:36:53,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1014 places, 609 transitions, 42830 flow. Second operand has 3 states, 3 states have (on average 608.6666666666666) internal successors, (1826), 3 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:53,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:36:53,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 608 of 611 [2021-06-10 14:36:53,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:36:55,200 INFO L129 PetriNetUnfolder]: 0/608 cut-off events. [2021-06-10 14:36:55,200 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:36:55,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21720 conditions, 608 events. 0/608 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1288 event pairs, 0 based on Foata normal form. 203/811 useless extension candidates. Maximal degree in co-relation 0. Up to 203 conditions per place. [2021-06-10 14:36:55,203 INFO L132 encePairwiseOnDemand]: 609/611 looper letters, 0 selfloop transitions, 1 changer transitions 0/608 dead transitions. [2021-06-10 14:36:55,203 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1015 places, 608 transitions, 42830 flow [2021-06-10 14:36:55,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:36:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:36:55,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1826 transitions. [2021-06-10 14:36:55,204 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9961811238406983 [2021-06-10 14:36:55,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1826 transitions. [2021-06-10 14:36:55,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1826 transitions. [2021-06-10 14:36:55,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:36:55,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1826 transitions. [2021-06-10 14:36:55,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 608.6666666666666) internal successors, (1826), 3 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:55,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:55,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:55,206 INFO L185 Difference]: Start difference. First operand has 1014 places, 609 transitions, 42830 flow. Second operand 3 states and 1826 transitions. [2021-06-10 14:36:55,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1015 places, 608 transitions, 42830 flow [2021-06-10 14:36:58,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1015 places, 608 transitions, 2228 flow, removed 20301 selfloop flow, removed 0 redundant places. [2021-06-10 14:36:58,572 INFO L241 Difference]: Finished difference. Result has 1015 places, 608 transitions, 2228 flow [2021-06-10 14:36:58,573 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=1013, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2228, PETRI_PLACES=1015, PETRI_TRANSITIONS=608} [2021-06-10 14:36:58,573 INFO L343 CegarLoopForPetriNet]: 1014 programPoint places, 1 predicate places. [2021-06-10 14:36:58,573 INFO L480 AbstractCegarLoop]: Abstraction has has 1015 places, 608 transitions, 2228 flow [2021-06-10 14:36:58,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 608.6666666666666) internal successors, (1826), 3 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:36:58,573 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:36:58,573 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:36:58,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402 [2021-06-10 14:36:58,573 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:36:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:36:58,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1506875817, now seen corresponding path program 1 times [2021-06-10 14:36:58,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:36:58,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102334142] [2021-06-10 14:36:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:36:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:58,689 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:36:58,692 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:36:58,775 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:36:58,775 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:36:58,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403 [2021-06-10 14:36:58,775 WARN L342 ceAbstractionStarter]: 202 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:36:58,775 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 203 thread instances. [2021-06-10 14:36:58,926 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:36:58,926 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:36:58,927 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:36:58,927 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:36:58,927 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:36:58,927 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:36:58,927 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:36:58,927 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:36:58,927 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:36:58,927 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:36:58,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1021 places, 614 transitions, 43249 flow [2021-06-10 14:37:00,230 INFO L129 PetriNetUnfolder]: 0/1223 cut-off events. [2021-06-10 14:37:00,230 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:00,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22539 conditions, 1223 events. 0/1223 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4840 event pairs, 0 based on Foata normal form. 0/1019 useless extension candidates. Maximal degree in co-relation 0. Up to 204 conditions per place. [2021-06-10 14:37:00,230 INFO L82 GeneralOperation]: Start removeDead. Operand has 1021 places, 614 transitions, 43249 flow [2021-06-10 14:37:00,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1019 places, 612 transitions, 43245 flow [2021-06-10 14:37:00,244 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:37:00,244 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:00,244 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:00,244 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:37:00,244 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:00,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:00,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2021315, now seen corresponding path program 1 times [2021-06-10 14:37:00,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:00,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489420081] [2021-06-10 14:37:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:00,406 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:00,406 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:37:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:00,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489420081] [2021-06-10 14:37:00,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:00,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:37:00,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112179436] [2021-06-10 14:37:00,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:37:00,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:00,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:37:00,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:37:00,409 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 611 out of 614 [2021-06-10 14:37:00,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1019 places, 612 transitions, 43245 flow. Second operand has 3 states, 3 states have (on average 611.6666666666666) internal successors, (1835), 3 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:00,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:00,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 611 of 614 [2021-06-10 14:37:00,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:01,225 INFO L129 PetriNetUnfolder]: 0/611 cut-off events. [2021-06-10 14:37:01,226 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:01,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21929 conditions, 611 events. 0/611 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1223 event pairs, 0 based on Foata normal form. 204/815 useless extension candidates. Maximal degree in co-relation 0. Up to 204 conditions per place. [2021-06-10 14:37:01,227 INFO L132 encePairwiseOnDemand]: 612/614 looper letters, 0 selfloop transitions, 1 changer transitions 0/611 dead transitions. [2021-06-10 14:37:01,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1020 places, 611 transitions, 43245 flow [2021-06-10 14:37:01,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:37:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:37:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1835 transitions. [2021-06-10 14:37:01,228 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.996199782844734 [2021-06-10 14:37:01,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1835 transitions. [2021-06-10 14:37:01,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1835 transitions. [2021-06-10 14:37:01,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:01,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1835 transitions. [2021-06-10 14:37:01,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 611.6666666666666) internal successors, (1835), 3 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:01,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 614.0) internal successors, (2456), 4 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:01,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 614.0) internal successors, (2456), 4 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:01,230 INFO L185 Difference]: Start difference. First operand has 1019 places, 612 transitions, 43245 flow. Second operand 3 states and 1835 transitions. [2021-06-10 14:37:01,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1020 places, 611 transitions, 43245 flow [2021-06-10 14:37:04,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1020 places, 611 transitions, 2239 flow, removed 20503 selfloop flow, removed 0 redundant places. [2021-06-10 14:37:04,767 INFO L241 Difference]: Finished difference. Result has 1020 places, 611 transitions, 2239 flow [2021-06-10 14:37:04,767 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=614, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=1018, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2239, PETRI_PLACES=1020, PETRI_TRANSITIONS=611} [2021-06-10 14:37:04,768 INFO L343 CegarLoopForPetriNet]: 1019 programPoint places, 1 predicate places. [2021-06-10 14:37:04,768 INFO L480 AbstractCegarLoop]: Abstraction has has 1020 places, 611 transitions, 2239 flow [2021-06-10 14:37:04,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 611.6666666666666) internal successors, (1835), 3 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:04,768 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:04,768 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:04,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404 [2021-06-10 14:37:04,768 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:04,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1379145127, now seen corresponding path program 1 times [2021-06-10 14:37:04,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:04,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211047697] [2021-06-10 14:37:04,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:04,885 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:04,888 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:04,972 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:37:04,972 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:37:04,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405 [2021-06-10 14:37:04,972 WARN L342 ceAbstractionStarter]: 203 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:37:04,972 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 204 thread instances. [2021-06-10 14:37:05,123 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:37:05,123 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:37:05,124 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:37:05,124 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:37:05,124 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:37:05,124 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:37:05,124 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:37:05,124 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:37:05,124 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:37:05,124 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:37:05,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1026 places, 617 transitions, 43666 flow [2021-06-10 14:37:06,430 INFO L129 PetriNetUnfolder]: 0/1229 cut-off events. [2021-06-10 14:37:06,430 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:06,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22752 conditions, 1229 events. 0/1229 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4806 event pairs, 0 based on Foata normal form. 0/1024 useless extension candidates. Maximal degree in co-relation 0. Up to 205 conditions per place. [2021-06-10 14:37:06,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 1026 places, 617 transitions, 43666 flow [2021-06-10 14:37:06,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1024 places, 615 transitions, 43662 flow [2021-06-10 14:37:06,444 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:37:06,444 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:06,444 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:06,444 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:37:06,444 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:06,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2041059, now seen corresponding path program 1 times [2021-06-10 14:37:06,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:06,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776416527] [2021-06-10 14:37:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:06,561 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:06,561 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:37:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:06,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776416527] [2021-06-10 14:37:06,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:06,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:37:06,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349598171] [2021-06-10 14:37:06,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:37:06,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:06,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:37:06,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:37:06,564 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 614 out of 617 [2021-06-10 14:37:06,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 615 transitions, 43662 flow. Second operand has 3 states, 3 states have (on average 614.6666666666666) internal successors, (1844), 3 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:06,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:06,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 614 of 617 [2021-06-10 14:37:06,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:07,575 INFO L129 PetriNetUnfolder]: 0/614 cut-off events. [2021-06-10 14:37:07,575 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:07,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22139 conditions, 614 events. 0/614 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1222 event pairs, 0 based on Foata normal form. 205/819 useless extension candidates. Maximal degree in co-relation 0. Up to 205 conditions per place. [2021-06-10 14:37:07,578 INFO L132 encePairwiseOnDemand]: 615/617 looper letters, 0 selfloop transitions, 1 changer transitions 0/614 dead transitions. [2021-06-10 14:37:07,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1025 places, 614 transitions, 43662 flow [2021-06-10 14:37:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:37:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:37:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1844 transitions. [2021-06-10 14:37:07,578 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9962182603997839 [2021-06-10 14:37:07,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1844 transitions. [2021-06-10 14:37:07,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1844 transitions. [2021-06-10 14:37:07,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:07,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1844 transitions. [2021-06-10 14:37:07,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 614.6666666666666) internal successors, (1844), 3 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:07,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:07,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:07,580 INFO L185 Difference]: Start difference. First operand has 1024 places, 615 transitions, 43662 flow. Second operand 3 states and 1844 transitions. [2021-06-10 14:37:07,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1025 places, 614 transitions, 43662 flow [2021-06-10 14:37:11,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1025 places, 614 transitions, 2250 flow, removed 20706 selfloop flow, removed 0 redundant places. [2021-06-10 14:37:11,256 INFO L241 Difference]: Finished difference. Result has 1025 places, 614 transitions, 2250 flow [2021-06-10 14:37:11,257 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=1023, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2250, PETRI_PLACES=1025, PETRI_TRANSITIONS=614} [2021-06-10 14:37:11,257 INFO L343 CegarLoopForPetriNet]: 1024 programPoint places, 1 predicate places. [2021-06-10 14:37:11,257 INFO L480 AbstractCegarLoop]: Abstraction has has 1025 places, 614 transitions, 2250 flow [2021-06-10 14:37:11,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 614.6666666666666) internal successors, (1844), 3 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:11,257 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:11,257 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:11,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406 [2021-06-10 14:37:11,257 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:11,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:11,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1916901402, now seen corresponding path program 1 times [2021-06-10 14:37:11,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:11,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612559349] [2021-06-10 14:37:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:11,378 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:11,381 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:11,466 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:37:11,466 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:37:11,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407 [2021-06-10 14:37:11,466 WARN L342 ceAbstractionStarter]: 204 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:37:11,467 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 205 thread instances. [2021-06-10 14:37:11,618 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:37:11,618 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:37:11,619 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:37:11,619 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:37:11,619 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:37:11,619 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:37:11,619 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:37:11,619 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:37:11,619 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:37:11,619 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:37:11,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1031 places, 620 transitions, 44085 flow [2021-06-10 14:37:12,933 INFO L129 PetriNetUnfolder]: 0/1235 cut-off events. [2021-06-10 14:37:12,933 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:12,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22966 conditions, 1235 events. 0/1235 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4841 event pairs, 0 based on Foata normal form. 0/1029 useless extension candidates. Maximal degree in co-relation 0. Up to 206 conditions per place. [2021-06-10 14:37:12,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 1031 places, 620 transitions, 44085 flow [2021-06-10 14:37:12,946 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1029 places, 618 transitions, 44081 flow [2021-06-10 14:37:12,947 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:37:12,947 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:12,947 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:12,947 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:37:12,947 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:12,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:12,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2060899, now seen corresponding path program 1 times [2021-06-10 14:37:12,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:12,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022946715] [2021-06-10 14:37:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:13,067 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:13,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:37:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:13,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022946715] [2021-06-10 14:37:13,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:13,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:37:13,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734549091] [2021-06-10 14:37:13,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:37:13,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:13,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:37:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:37:13,070 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 617 out of 620 [2021-06-10 14:37:13,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1029 places, 618 transitions, 44081 flow. Second operand has 3 states, 3 states have (on average 617.6666666666666) internal successors, (1853), 3 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:13,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:13,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 617 of 620 [2021-06-10 14:37:13,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:14,119 INFO L129 PetriNetUnfolder]: 0/617 cut-off events. [2021-06-10 14:37:14,119 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:14,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22350 conditions, 617 events. 0/617 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1248 event pairs, 0 based on Foata normal form. 206/823 useless extension candidates. Maximal degree in co-relation 0. Up to 206 conditions per place. [2021-06-10 14:37:14,121 INFO L132 encePairwiseOnDemand]: 618/620 looper letters, 0 selfloop transitions, 1 changer transitions 0/617 dead transitions. [2021-06-10 14:37:14,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1030 places, 617 transitions, 44081 flow [2021-06-10 14:37:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:37:14,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:37:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1853 transitions. [2021-06-10 14:37:14,122 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9962365591397849 [2021-06-10 14:37:14,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1853 transitions. [2021-06-10 14:37:14,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1853 transitions. [2021-06-10 14:37:14,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:14,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1853 transitions. [2021-06-10 14:37:14,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 617.6666666666666) internal successors, (1853), 3 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:14,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:14,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 620.0) internal successors, (2480), 4 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:14,124 INFO L185 Difference]: Start difference. First operand has 1029 places, 618 transitions, 44081 flow. Second operand 3 states and 1853 transitions. [2021-06-10 14:37:14,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1030 places, 617 transitions, 44081 flow [2021-06-10 14:37:17,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1030 places, 617 transitions, 2261 flow, removed 20910 selfloop flow, removed 0 redundant places. [2021-06-10 14:37:17,810 INFO L241 Difference]: Finished difference. Result has 1030 places, 617 transitions, 2261 flow [2021-06-10 14:37:17,810 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=620, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=1028, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2261, PETRI_PLACES=1030, PETRI_TRANSITIONS=617} [2021-06-10 14:37:17,811 INFO L343 CegarLoopForPetriNet]: 1029 programPoint places, 1 predicate places. [2021-06-10 14:37:17,811 INFO L480 AbstractCegarLoop]: Abstraction has has 1030 places, 617 transitions, 2261 flow [2021-06-10 14:37:17,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 617.6666666666666) internal successors, (1853), 3 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:17,811 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:17,811 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:17,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408 [2021-06-10 14:37:17,811 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:17,811 INFO L82 PathProgramCache]: Analyzing trace with hash 836815949, now seen corresponding path program 1 times [2021-06-10 14:37:17,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:17,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104039337] [2021-06-10 14:37:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:17,938 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:17,941 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:18,028 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:37:18,028 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:37:18,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409 [2021-06-10 14:37:18,028 WARN L342 ceAbstractionStarter]: 205 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:37:18,028 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 206 thread instances. [2021-06-10 14:37:18,182 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:37:18,182 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:37:18,182 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:37:18,182 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:37:18,182 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:37:18,182 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:37:18,182 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:37:18,182 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:37:18,182 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:37:18,182 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:37:18,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1036 places, 623 transitions, 44506 flow [2021-06-10 14:37:19,541 INFO L129 PetriNetUnfolder]: 0/1241 cut-off events. [2021-06-10 14:37:19,542 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:19,542 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23181 conditions, 1241 events. 0/1241 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4682 event pairs, 0 based on Foata normal form. 0/1034 useless extension candidates. Maximal degree in co-relation 0. Up to 207 conditions per place. [2021-06-10 14:37:19,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 1036 places, 623 transitions, 44506 flow [2021-06-10 14:37:19,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1034 places, 621 transitions, 44502 flow [2021-06-10 14:37:19,557 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:37:19,557 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:19,557 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:19,557 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:37:19,557 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:19,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:19,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2080835, now seen corresponding path program 1 times [2021-06-10 14:37:19,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:19,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762743891] [2021-06-10 14:37:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:19,677 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:19,677 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:37:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:19,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762743891] [2021-06-10 14:37:19,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:19,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:37:19,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252893760] [2021-06-10 14:37:19,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:37:19,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:19,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:37:19,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:37:19,680 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 620 out of 623 [2021-06-10 14:37:19,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1034 places, 621 transitions, 44502 flow. Second operand has 3 states, 3 states have (on average 620.6666666666666) internal successors, (1862), 3 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:19,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:19,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 620 of 623 [2021-06-10 14:37:19,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:20,801 INFO L129 PetriNetUnfolder]: 0/620 cut-off events. [2021-06-10 14:37:20,801 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:20,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22562 conditions, 620 events. 0/620 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1169 event pairs, 0 based on Foata normal form. 207/827 useless extension candidates. Maximal degree in co-relation 0. Up to 207 conditions per place. [2021-06-10 14:37:20,803 INFO L132 encePairwiseOnDemand]: 621/623 looper letters, 0 selfloop transitions, 1 changer transitions 0/620 dead transitions. [2021-06-10 14:37:20,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1035 places, 620 transitions, 44502 flow [2021-06-10 14:37:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:37:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:37:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1862 transitions. [2021-06-10 14:37:20,804 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9962546816479401 [2021-06-10 14:37:20,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1862 transitions. [2021-06-10 14:37:20,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1862 transitions. [2021-06-10 14:37:20,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:20,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1862 transitions. [2021-06-10 14:37:20,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 620.6666666666666) internal successors, (1862), 3 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:20,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 623.0) internal successors, (2492), 4 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:20,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 623.0) internal successors, (2492), 4 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:20,806 INFO L185 Difference]: Start difference. First operand has 1034 places, 621 transitions, 44502 flow. Second operand 3 states and 1862 transitions. [2021-06-10 14:37:20,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1035 places, 620 transitions, 44502 flow [2021-06-10 14:37:24,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1035 places, 620 transitions, 2272 flow, removed 21115 selfloop flow, removed 0 redundant places. [2021-06-10 14:37:24,653 INFO L241 Difference]: Finished difference. Result has 1035 places, 620 transitions, 2272 flow [2021-06-10 14:37:24,653 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=1033, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2272, PETRI_PLACES=1035, PETRI_TRANSITIONS=620} [2021-06-10 14:37:24,653 INFO L343 CegarLoopForPetriNet]: 1034 programPoint places, 1 predicate places. [2021-06-10 14:37:24,653 INFO L480 AbstractCegarLoop]: Abstraction has has 1035 places, 620 transitions, 2272 flow [2021-06-10 14:37:24,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 620.6666666666666) internal successors, (1862), 3 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:24,654 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:24,654 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:24,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410 [2021-06-10 14:37:24,654 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:24,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1318143133, now seen corresponding path program 1 times [2021-06-10 14:37:24,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:24,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592067660] [2021-06-10 14:37:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:24,782 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:24,785 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:24,874 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:37:24,874 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:37:24,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable411 [2021-06-10 14:37:24,874 WARN L342 ceAbstractionStarter]: 206 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:37:24,874 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 207 thread instances. [2021-06-10 14:37:25,027 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:37:25,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:37:25,028 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:37:25,028 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:37:25,028 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:37:25,028 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:37:25,028 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:37:25,028 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:37:25,028 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:37:25,028 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:37:25,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1041 places, 626 transitions, 44929 flow [2021-06-10 14:37:26,385 INFO L129 PetriNetUnfolder]: 0/1247 cut-off events. [2021-06-10 14:37:26,385 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:26,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23397 conditions, 1247 events. 0/1247 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4810 event pairs, 0 based on Foata normal form. 0/1039 useless extension candidates. Maximal degree in co-relation 0. Up to 208 conditions per place. [2021-06-10 14:37:26,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 1041 places, 626 transitions, 44929 flow [2021-06-10 14:37:26,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1039 places, 624 transitions, 44925 flow [2021-06-10 14:37:26,400 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:37:26,400 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:26,400 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:26,400 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:37:26,400 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:26,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:26,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2100867, now seen corresponding path program 1 times [2021-06-10 14:37:26,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:26,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425383184] [2021-06-10 14:37:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:26,517 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:26,517 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:37:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:26,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425383184] [2021-06-10 14:37:26,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:26,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:37:26,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989702417] [2021-06-10 14:37:26,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:37:26,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:26,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:37:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:37:26,520 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 623 out of 626 [2021-06-10 14:37:26,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1039 places, 624 transitions, 44925 flow. Second operand has 3 states, 3 states have (on average 623.6666666666666) internal successors, (1871), 3 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:26,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:26,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 623 of 626 [2021-06-10 14:37:26,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:27,667 INFO L129 PetriNetUnfolder]: 0/623 cut-off events. [2021-06-10 14:37:27,667 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:27,668 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22775 conditions, 623 events. 0/623 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1211 event pairs, 0 based on Foata normal form. 208/831 useless extension candidates. Maximal degree in co-relation 0. Up to 208 conditions per place. [2021-06-10 14:37:27,673 INFO L132 encePairwiseOnDemand]: 624/626 looper letters, 0 selfloop transitions, 1 changer transitions 0/623 dead transitions. [2021-06-10 14:37:27,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1040 places, 623 transitions, 44925 flow [2021-06-10 14:37:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:37:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:37:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1871 transitions. [2021-06-10 14:37:27,673 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.996272630457934 [2021-06-10 14:37:27,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1871 transitions. [2021-06-10 14:37:27,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1871 transitions. [2021-06-10 14:37:27,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:27,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1871 transitions. [2021-06-10 14:37:27,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 623.6666666666666) internal successors, (1871), 3 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:27,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 626.0) internal successors, (2504), 4 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:27,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 626.0) internal successors, (2504), 4 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:27,676 INFO L185 Difference]: Start difference. First operand has 1039 places, 624 transitions, 44925 flow. Second operand 3 states and 1871 transitions. [2021-06-10 14:37:27,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1040 places, 623 transitions, 44925 flow [2021-06-10 14:37:31,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1040 places, 623 transitions, 2283 flow, removed 21321 selfloop flow, removed 0 redundant places. [2021-06-10 14:37:31,253 INFO L241 Difference]: Finished difference. Result has 1040 places, 623 transitions, 2283 flow [2021-06-10 14:37:31,253 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=626, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=1038, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2283, PETRI_PLACES=1040, PETRI_TRANSITIONS=623} [2021-06-10 14:37:31,253 INFO L343 CegarLoopForPetriNet]: 1039 programPoint places, 1 predicate places. [2021-06-10 14:37:31,253 INFO L480 AbstractCegarLoop]: Abstraction has has 1040 places, 623 transitions, 2283 flow [2021-06-10 14:37:31,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 623.6666666666666) internal successors, (1871), 3 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:31,254 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:31,254 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:31,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412 [2021-06-10 14:37:31,254 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:31,254 INFO L82 PathProgramCache]: Analyzing trace with hash -147588595, now seen corresponding path program 1 times [2021-06-10 14:37:31,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:31,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096992217] [2021-06-10 14:37:31,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:31,502 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:31,505 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:31,592 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:37:31,592 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:37:31,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413 [2021-06-10 14:37:31,592 WARN L342 ceAbstractionStarter]: 207 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:37:31,592 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 208 thread instances. [2021-06-10 14:37:31,744 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:37:31,744 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:37:31,744 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:37:31,745 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:37:31,745 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:37:31,745 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:37:31,745 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:37:31,745 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:37:31,745 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:37:31,745 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:37:31,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1046 places, 629 transitions, 45354 flow [2021-06-10 14:37:33,154 INFO L129 PetriNetUnfolder]: 0/1253 cut-off events. [2021-06-10 14:37:33,154 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:33,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23614 conditions, 1253 events. 0/1253 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4814 event pairs, 0 based on Foata normal form. 0/1044 useless extension candidates. Maximal degree in co-relation 0. Up to 209 conditions per place. [2021-06-10 14:37:33,154 INFO L82 GeneralOperation]: Start removeDead. Operand has 1046 places, 629 transitions, 45354 flow [2021-06-10 14:37:33,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1044 places, 627 transitions, 45350 flow [2021-06-10 14:37:33,169 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:37:33,169 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:33,169 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:33,169 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:37:33,169 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:33,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2120995, now seen corresponding path program 1 times [2021-06-10 14:37:33,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:33,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748343184] [2021-06-10 14:37:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:33,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:33,295 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:37:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:33,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748343184] [2021-06-10 14:37:33,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:33,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:37:33,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408398705] [2021-06-10 14:37:33,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:37:33,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:33,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:37:33,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:37:33,298 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 626 out of 629 [2021-06-10 14:37:33,298 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1044 places, 627 transitions, 45350 flow. Second operand has 3 states, 3 states have (on average 626.6666666666666) internal successors, (1880), 3 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:33,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:33,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 626 of 629 [2021-06-10 14:37:33,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:34,631 INFO L129 PetriNetUnfolder]: 0/626 cut-off events. [2021-06-10 14:37:34,632 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:34,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22989 conditions, 626 events. 0/626 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1419 event pairs, 0 based on Foata normal form. 209/835 useless extension candidates. Maximal degree in co-relation 0. Up to 209 conditions per place. [2021-06-10 14:37:34,634 INFO L132 encePairwiseOnDemand]: 627/629 looper letters, 0 selfloop transitions, 1 changer transitions 0/626 dead transitions. [2021-06-10 14:37:34,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1045 places, 626 transitions, 45350 flow [2021-06-10 14:37:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:37:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:37:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1880 transitions. [2021-06-10 14:37:34,634 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9962904080551139 [2021-06-10 14:37:34,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1880 transitions. [2021-06-10 14:37:34,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1880 transitions. [2021-06-10 14:37:34,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:34,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1880 transitions. [2021-06-10 14:37:34,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 626.6666666666666) internal successors, (1880), 3 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:34,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:34,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:34,637 INFO L185 Difference]: Start difference. First operand has 1044 places, 627 transitions, 45350 flow. Second operand 3 states and 1880 transitions. [2021-06-10 14:37:34,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1045 places, 626 transitions, 45350 flow [2021-06-10 14:37:38,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1045 places, 626 transitions, 2294 flow, removed 21528 selfloop flow, removed 0 redundant places. [2021-06-10 14:37:38,269 INFO L241 Difference]: Finished difference. Result has 1045 places, 626 transitions, 2294 flow [2021-06-10 14:37:38,269 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=1043, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2294, PETRI_PLACES=1045, PETRI_TRANSITIONS=626} [2021-06-10 14:37:38,269 INFO L343 CegarLoopForPetriNet]: 1044 programPoint places, 1 predicate places. [2021-06-10 14:37:38,269 INFO L480 AbstractCegarLoop]: Abstraction has has 1045 places, 626 transitions, 2294 flow [2021-06-10 14:37:38,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 626.6666666666666) internal successors, (1880), 3 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:38,269 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:38,270 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:38,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414 [2021-06-10 14:37:38,270 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:38,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:38,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1656318048, now seen corresponding path program 1 times [2021-06-10 14:37:38,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:38,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009837045] [2021-06-10 14:37:38,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:38,608 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:38,611 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:38,678 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:37:38,678 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:37:38,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415 [2021-06-10 14:37:38,678 WARN L342 ceAbstractionStarter]: 208 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:37:38,678 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 209 thread instances. [2021-06-10 14:37:38,831 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:37:38,831 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:37:38,831 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:37:38,831 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:37:38,831 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:37:38,831 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:37:38,831 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:37:38,831 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:37:38,832 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:37:38,832 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:37:38,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1051 places, 632 transitions, 45781 flow [2021-06-10 14:37:40,264 INFO L129 PetriNetUnfolder]: 0/1259 cut-off events. [2021-06-10 14:37:40,264 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:40,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23832 conditions, 1259 events. 0/1259 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5049 event pairs, 0 based on Foata normal form. 0/1049 useless extension candidates. Maximal degree in co-relation 0. Up to 210 conditions per place. [2021-06-10 14:37:40,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 1051 places, 632 transitions, 45781 flow [2021-06-10 14:37:40,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1049 places, 630 transitions, 45777 flow [2021-06-10 14:37:40,278 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:37:40,278 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:40,278 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:40,278 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:37:40,279 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2141219, now seen corresponding path program 1 times [2021-06-10 14:37:40,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:40,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167829006] [2021-06-10 14:37:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:40,397 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:40,398 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:37:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:40,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167829006] [2021-06-10 14:37:40,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:40,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:37:40,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712502281] [2021-06-10 14:37:40,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:37:40,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:40,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:37:40,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:37:40,401 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 632 [2021-06-10 14:37:40,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1049 places, 630 transitions, 45777 flow. Second operand has 3 states, 3 states have (on average 629.6666666666666) internal successors, (1889), 3 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:40,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:40,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 632 [2021-06-10 14:37:40,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:41,682 INFO L129 PetriNetUnfolder]: 0/629 cut-off events. [2021-06-10 14:37:41,682 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:41,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23204 conditions, 629 events. 0/629 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1284 event pairs, 0 based on Foata normal form. 210/839 useless extension candidates. Maximal degree in co-relation 0. Up to 210 conditions per place. [2021-06-10 14:37:41,684 INFO L132 encePairwiseOnDemand]: 630/632 looper letters, 0 selfloop transitions, 1 changer transitions 0/629 dead transitions. [2021-06-10 14:37:41,684 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1050 places, 629 transitions, 45777 flow [2021-06-10 14:37:41,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:37:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:37:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1889 transitions. [2021-06-10 14:37:41,685 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9963080168776371 [2021-06-10 14:37:41,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1889 transitions. [2021-06-10 14:37:41,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1889 transitions. [2021-06-10 14:37:41,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:41,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1889 transitions. [2021-06-10 14:37:41,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 629.6666666666666) internal successors, (1889), 3 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:41,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:41,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:41,687 INFO L185 Difference]: Start difference. First operand has 1049 places, 630 transitions, 45777 flow. Second operand 3 states and 1889 transitions. [2021-06-10 14:37:41,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1050 places, 629 transitions, 45777 flow [2021-06-10 14:37:45,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1050 places, 629 transitions, 2305 flow, removed 21736 selfloop flow, removed 0 redundant places. [2021-06-10 14:37:45,232 INFO L241 Difference]: Finished difference. Result has 1050 places, 629 transitions, 2305 flow [2021-06-10 14:37:45,233 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=632, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=1048, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2305, PETRI_PLACES=1050, PETRI_TRANSITIONS=629} [2021-06-10 14:37:45,233 INFO L343 CegarLoopForPetriNet]: 1049 programPoint places, 1 predicate places. [2021-06-10 14:37:45,233 INFO L480 AbstractCegarLoop]: Abstraction has has 1050 places, 629 transitions, 2305 flow [2021-06-10 14:37:45,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 629.6666666666666) internal successors, (1889), 3 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:45,233 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:45,233 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:45,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416 [2021-06-10 14:37:45,233 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash -304408807, now seen corresponding path program 1 times [2021-06-10 14:37:45,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:45,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130521960] [2021-06-10 14:37:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:45,364 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:45,531 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:45,601 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:37:45,601 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:37:45,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417 [2021-06-10 14:37:45,602 WARN L342 ceAbstractionStarter]: 209 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:37:45,602 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 210 thread instances. [2021-06-10 14:37:45,758 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:37:45,758 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:37:45,759 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:37:45,759 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:37:45,759 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:37:45,759 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:37:45,759 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:37:45,759 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:37:45,759 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:37:45,759 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:37:45,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1056 places, 635 transitions, 46210 flow [2021-06-10 14:37:47,244 INFO L129 PetriNetUnfolder]: 0/1265 cut-off events. [2021-06-10 14:37:47,245 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:47,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24051 conditions, 1265 events. 0/1265 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4793 event pairs, 0 based on Foata normal form. 0/1054 useless extension candidates. Maximal degree in co-relation 0. Up to 211 conditions per place. [2021-06-10 14:37:47,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 1056 places, 635 transitions, 46210 flow [2021-06-10 14:37:47,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1054 places, 633 transitions, 46206 flow [2021-06-10 14:37:47,260 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:37:47,260 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:47,260 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:47,260 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:37:47,261 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:47,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2161539, now seen corresponding path program 1 times [2021-06-10 14:37:47,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:47,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683176512] [2021-06-10 14:37:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:47,383 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:47,383 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:37:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:47,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683176512] [2021-06-10 14:37:47,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:47,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:37:47,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838053189] [2021-06-10 14:37:47,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:37:47,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:47,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:37:47,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:37:47,386 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 635 [2021-06-10 14:37:47,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1054 places, 633 transitions, 46206 flow. Second operand has 3 states, 3 states have (on average 632.6666666666666) internal successors, (1898), 3 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:47,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:47,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 635 [2021-06-10 14:37:47,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:48,823 INFO L129 PetriNetUnfolder]: 0/632 cut-off events. [2021-06-10 14:37:48,823 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:48,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23420 conditions, 632 events. 0/632 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1172 event pairs, 0 based on Foata normal form. 211/843 useless extension candidates. Maximal degree in co-relation 0. Up to 211 conditions per place. [2021-06-10 14:37:48,825 INFO L132 encePairwiseOnDemand]: 633/635 looper letters, 0 selfloop transitions, 1 changer transitions 0/632 dead transitions. [2021-06-10 14:37:48,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1055 places, 632 transitions, 46206 flow [2021-06-10 14:37:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:37:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:37:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1898 transitions. [2021-06-10 14:37:48,826 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9963254593175853 [2021-06-10 14:37:48,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1898 transitions. [2021-06-10 14:37:48,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1898 transitions. [2021-06-10 14:37:48,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:48,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1898 transitions. [2021-06-10 14:37:48,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 632.6666666666666) internal successors, (1898), 3 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:48,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 635.0) internal successors, (2540), 4 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:48,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 635.0) internal successors, (2540), 4 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:48,828 INFO L185 Difference]: Start difference. First operand has 1054 places, 633 transitions, 46206 flow. Second operand 3 states and 1898 transitions. [2021-06-10 14:37:48,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1055 places, 632 transitions, 46206 flow [2021-06-10 14:37:52,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1055 places, 632 transitions, 2316 flow, removed 21945 selfloop flow, removed 0 redundant places. [2021-06-10 14:37:52,473 INFO L241 Difference]: Finished difference. Result has 1055 places, 632 transitions, 2316 flow [2021-06-10 14:37:52,474 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=635, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=1053, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2316, PETRI_PLACES=1055, PETRI_TRANSITIONS=632} [2021-06-10 14:37:52,474 INFO L343 CegarLoopForPetriNet]: 1054 programPoint places, 1 predicate places. [2021-06-10 14:37:52,474 INFO L480 AbstractCegarLoop]: Abstraction has has 1055 places, 632 transitions, 2316 flow [2021-06-10 14:37:52,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 632.6666666666666) internal successors, (1898), 3 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:52,474 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:52,474 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:37:52,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418 [2021-06-10 14:37:52,474 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:52,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:52,474 INFO L82 PathProgramCache]: Analyzing trace with hash -401653789, now seen corresponding path program 1 times [2021-06-10 14:37:52,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:52,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230334415] [2021-06-10 14:37:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:52,787 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:52,791 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:52,878 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:37:52,878 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:37:52,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419 [2021-06-10 14:37:52,878 WARN L342 ceAbstractionStarter]: 210 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:37:52,878 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 211 thread instances. [2021-06-10 14:37:53,063 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:37:53,063 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:37:53,063 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:37:53,064 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:37:53,064 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:37:53,064 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:37:53,064 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:37:53,064 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:37:53,064 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:37:53,064 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:37:53,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1061 places, 638 transitions, 46641 flow [2021-06-10 14:37:54,721 INFO L129 PetriNetUnfolder]: 0/1271 cut-off events. [2021-06-10 14:37:54,721 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:54,721 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24271 conditions, 1271 events. 0/1271 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5048 event pairs, 0 based on Foata normal form. 0/1059 useless extension candidates. Maximal degree in co-relation 0. Up to 212 conditions per place. [2021-06-10 14:37:54,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 1061 places, 638 transitions, 46641 flow [2021-06-10 14:37:54,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1059 places, 636 transitions, 46637 flow [2021-06-10 14:37:54,737 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:37:54,737 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:54,737 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:54,737 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:37:54,737 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:54,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2181955, now seen corresponding path program 1 times [2021-06-10 14:37:54,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:54,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776921728] [2021-06-10 14:37:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:54,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:54,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:37:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:54,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776921728] [2021-06-10 14:37:54,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:54,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:37:54,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748566754] [2021-06-10 14:37:54,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:37:54,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:54,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:37:54,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:37:54,867 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 635 out of 638 [2021-06-10 14:37:54,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1059 places, 636 transitions, 46637 flow. Second operand has 3 states, 3 states have (on average 635.6666666666666) internal successors, (1907), 3 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:54,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:54,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 635 of 638 [2021-06-10 14:37:54,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:56,333 INFO L129 PetriNetUnfolder]: 0/635 cut-off events. [2021-06-10 14:37:56,333 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:56,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23637 conditions, 635 events. 0/635 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1256 event pairs, 0 based on Foata normal form. 212/847 useless extension candidates. Maximal degree in co-relation 0. Up to 212 conditions per place. [2021-06-10 14:37:56,335 INFO L132 encePairwiseOnDemand]: 636/638 looper letters, 0 selfloop transitions, 1 changer transitions 0/635 dead transitions. [2021-06-10 14:37:56,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1060 places, 635 transitions, 46637 flow [2021-06-10 14:37:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:37:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:37:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1907 transitions. [2021-06-10 14:37:56,336 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9963427377220481 [2021-06-10 14:37:56,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1907 transitions. [2021-06-10 14:37:56,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1907 transitions. [2021-06-10 14:37:56,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:56,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1907 transitions. [2021-06-10 14:37:56,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 635.6666666666666) internal successors, (1907), 3 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:56,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 638.0) internal successors, (2552), 4 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:56,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 638.0) internal successors, (2552), 4 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:56,338 INFO L185 Difference]: Start difference. First operand has 1059 places, 636 transitions, 46637 flow. Second operand 3 states and 1907 transitions. [2021-06-10 14:37:56,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1060 places, 635 transitions, 46637 flow [2021-06-10 14:38:00,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1060 places, 635 transitions, 2327 flow, removed 22155 selfloop flow, removed 0 redundant places. [2021-06-10 14:38:00,100 INFO L241 Difference]: Finished difference. Result has 1060 places, 635 transitions, 2327 flow [2021-06-10 14:38:00,100 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=638, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=1058, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2327, PETRI_PLACES=1060, PETRI_TRANSITIONS=635} [2021-06-10 14:38:00,101 INFO L343 CegarLoopForPetriNet]: 1059 programPoint places, 1 predicate places. [2021-06-10 14:38:00,101 INFO L480 AbstractCegarLoop]: Abstraction has has 1060 places, 635 transitions, 2327 flow [2021-06-10 14:38:00,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 635.6666666666666) internal successors, (1907), 3 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:00,101 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:00,101 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:00,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420 [2021-06-10 14:38:00,101 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:00,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:00,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1295648497, now seen corresponding path program 1 times [2021-06-10 14:38:00,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:00,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713980098] [2021-06-10 14:38:00,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:00,452 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:00,455 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:00,525 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:38:00,525 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:38:00,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421 [2021-06-10 14:38:00,525 WARN L342 ceAbstractionStarter]: 211 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:38:00,526 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 212 thread instances. [2021-06-10 14:38:00,683 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:38:00,683 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:38:00,683 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:38:00,683 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:38:00,683 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:38:00,683 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:38:00,683 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:38:00,683 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:38:00,683 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:38:00,683 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:38:00,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1066 places, 641 transitions, 47074 flow [2021-06-10 14:38:02,177 INFO L129 PetriNetUnfolder]: 0/1277 cut-off events. [2021-06-10 14:38:02,178 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:02,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24492 conditions, 1277 events. 0/1277 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5084 event pairs, 0 based on Foata normal form. 0/1064 useless extension candidates. Maximal degree in co-relation 0. Up to 213 conditions per place. [2021-06-10 14:38:02,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 1066 places, 641 transitions, 47074 flow [2021-06-10 14:38:02,192 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1064 places, 639 transitions, 47070 flow [2021-06-10 14:38:02,193 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:38:02,193 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:02,193 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:02,193 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:38:02,193 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:02,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:02,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2202467, now seen corresponding path program 1 times [2021-06-10 14:38:02,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:02,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356561420] [2021-06-10 14:38:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:02,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:02,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:38:02,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356561420] [2021-06-10 14:38:02,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:02,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:38:02,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204697192] [2021-06-10 14:38:02,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:38:02,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:02,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:38:02,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:38:02,323 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 638 out of 641 [2021-06-10 14:38:02,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1064 places, 639 transitions, 47070 flow. Second operand has 3 states, 3 states have (on average 638.6666666666666) internal successors, (1916), 3 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:02,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:02,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 638 of 641 [2021-06-10 14:38:02,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:03,622 INFO L129 PetriNetUnfolder]: 0/638 cut-off events. [2021-06-10 14:38:03,622 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:03,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23855 conditions, 638 events. 0/638 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1431 event pairs, 0 based on Foata normal form. 213/851 useless extension candidates. Maximal degree in co-relation 0. Up to 213 conditions per place. [2021-06-10 14:38:03,624 INFO L132 encePairwiseOnDemand]: 639/641 looper letters, 0 selfloop transitions, 1 changer transitions 0/638 dead transitions. [2021-06-10 14:38:03,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1065 places, 638 transitions, 47070 flow [2021-06-10 14:38:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:38:03,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:38:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1916 transitions. [2021-06-10 14:38:03,625 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9963598543941757 [2021-06-10 14:38:03,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1916 transitions. [2021-06-10 14:38:03,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1916 transitions. [2021-06-10 14:38:03,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:03,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1916 transitions. [2021-06-10 14:38:03,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 638.6666666666666) internal successors, (1916), 3 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:03,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 641.0) internal successors, (2564), 4 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:03,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 641.0) internal successors, (2564), 4 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:03,627 INFO L185 Difference]: Start difference. First operand has 1064 places, 639 transitions, 47070 flow. Second operand 3 states and 1916 transitions. [2021-06-10 14:38:03,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1065 places, 638 transitions, 47070 flow [2021-06-10 14:38:07,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1065 places, 638 transitions, 2338 flow, removed 22366 selfloop flow, removed 0 redundant places. [2021-06-10 14:38:07,527 INFO L241 Difference]: Finished difference. Result has 1065 places, 638 transitions, 2338 flow [2021-06-10 14:38:07,527 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=641, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=1063, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2338, PETRI_PLACES=1065, PETRI_TRANSITIONS=638} [2021-06-10 14:38:07,527 INFO L343 CegarLoopForPetriNet]: 1064 programPoint places, 1 predicate places. [2021-06-10 14:38:07,527 INFO L480 AbstractCegarLoop]: Abstraction has has 1065 places, 638 transitions, 2338 flow [2021-06-10 14:38:07,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 638.6666666666666) internal successors, (1916), 3 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:07,527 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:07,527 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:07,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422 [2021-06-10 14:38:07,527 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:07,528 INFO L82 PathProgramCache]: Analyzing trace with hash 957466534, now seen corresponding path program 1 times [2021-06-10 14:38:07,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:07,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154451540] [2021-06-10 14:38:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:07,804 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:07,807 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:07,894 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:38:07,894 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:38:07,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423 [2021-06-10 14:38:07,894 WARN L342 ceAbstractionStarter]: 212 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:38:07,894 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 213 thread instances. [2021-06-10 14:38:08,061 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:38:08,061 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:38:08,061 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:38:08,061 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:38:08,061 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:38:08,061 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:38:08,061 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:38:08,061 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:38:08,061 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:38:08,061 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:38:08,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1071 places, 644 transitions, 47509 flow [2021-06-10 14:38:09,548 INFO L129 PetriNetUnfolder]: 0/1283 cut-off events. [2021-06-10 14:38:09,549 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:09,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24714 conditions, 1283 events. 0/1283 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4960 event pairs, 0 based on Foata normal form. 0/1069 useless extension candidates. Maximal degree in co-relation 0. Up to 214 conditions per place. [2021-06-10 14:38:09,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 1071 places, 644 transitions, 47509 flow [2021-06-10 14:38:09,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1069 places, 642 transitions, 47505 flow [2021-06-10 14:38:09,564 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:38:09,564 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:09,564 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:09,564 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:38:09,564 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:09,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2223075, now seen corresponding path program 1 times [2021-06-10 14:38:09,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:09,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964935216] [2021-06-10 14:38:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:09,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:09,693 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:38:09,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964935216] [2021-06-10 14:38:09,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:09,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:38:09,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758096459] [2021-06-10 14:38:09,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:38:09,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:09,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:38:09,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:38:09,696 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 641 out of 644 [2021-06-10 14:38:09,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1069 places, 642 transitions, 47505 flow. Second operand has 3 states, 3 states have (on average 641.6666666666666) internal successors, (1925), 3 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:09,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:09,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 641 of 644 [2021-06-10 14:38:09,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:11,068 INFO L129 PetriNetUnfolder]: 0/641 cut-off events. [2021-06-10 14:38:11,068 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:11,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24074 conditions, 641 events. 0/641 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1237 event pairs, 0 based on Foata normal form. 214/855 useless extension candidates. Maximal degree in co-relation 0. Up to 214 conditions per place. [2021-06-10 14:38:11,070 INFO L132 encePairwiseOnDemand]: 642/644 looper letters, 0 selfloop transitions, 1 changer transitions 0/641 dead transitions. [2021-06-10 14:38:11,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1070 places, 641 transitions, 47505 flow [2021-06-10 14:38:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:38:11,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:38:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1925 transitions. [2021-06-10 14:38:11,071 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9963768115942029 [2021-06-10 14:38:11,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1925 transitions. [2021-06-10 14:38:11,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1925 transitions. [2021-06-10 14:38:11,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:11,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1925 transitions. [2021-06-10 14:38:11,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 641.6666666666666) internal successors, (1925), 3 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:11,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:11,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:11,073 INFO L185 Difference]: Start difference. First operand has 1069 places, 642 transitions, 47505 flow. Second operand 3 states and 1925 transitions. [2021-06-10 14:38:11,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1070 places, 641 transitions, 47505 flow [2021-06-10 14:38:15,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1070 places, 641 transitions, 2349 flow, removed 22578 selfloop flow, removed 0 redundant places. [2021-06-10 14:38:15,147 INFO L241 Difference]: Finished difference. Result has 1070 places, 641 transitions, 2349 flow [2021-06-10 14:38:15,147 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=1068, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2349, PETRI_PLACES=1070, PETRI_TRANSITIONS=641} [2021-06-10 14:38:15,147 INFO L343 CegarLoopForPetriNet]: 1069 programPoint places, 1 predicate places. [2021-06-10 14:38:15,147 INFO L480 AbstractCegarLoop]: Abstraction has has 1070 places, 641 transitions, 2349 flow [2021-06-10 14:38:15,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 641.6666666666666) internal successors, (1925), 3 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:15,147 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:15,147 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:15,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424 [2021-06-10 14:38:15,147 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:15,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:15,147 INFO L82 PathProgramCache]: Analyzing trace with hash 294841621, now seen corresponding path program 1 times [2021-06-10 14:38:15,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:15,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93893446] [2021-06-10 14:38:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:15,425 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:15,428 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:15,508 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:38:15,509 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:38:15,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425 [2021-06-10 14:38:15,509 WARN L342 ceAbstractionStarter]: 213 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:38:15,509 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 214 thread instances. [2021-06-10 14:38:15,670 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:38:15,670 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:38:15,670 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:38:15,670 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:38:15,670 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:38:15,671 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:38:15,671 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:38:15,671 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:38:15,671 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:38:15,671 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:38:15,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1076 places, 647 transitions, 47946 flow [2021-06-10 14:38:17,189 INFO L129 PetriNetUnfolder]: 0/1289 cut-off events. [2021-06-10 14:38:17,189 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:17,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24937 conditions, 1289 events. 0/1289 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5043 event pairs, 0 based on Foata normal form. 0/1074 useless extension candidates. Maximal degree in co-relation 0. Up to 215 conditions per place. [2021-06-10 14:38:17,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 1076 places, 647 transitions, 47946 flow [2021-06-10 14:38:17,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1074 places, 645 transitions, 47942 flow [2021-06-10 14:38:17,205 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:38:17,205 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:17,205 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:17,205 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:38:17,205 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:17,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:17,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2243779, now seen corresponding path program 1 times [2021-06-10 14:38:17,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:17,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296250558] [2021-06-10 14:38:17,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:17,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:17,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:38:17,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296250558] [2021-06-10 14:38:17,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:17,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:38:17,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910027638] [2021-06-10 14:38:17,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:38:17,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:17,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:38:17,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:38:17,344 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 644 out of 647 [2021-06-10 14:38:17,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1074 places, 645 transitions, 47942 flow. Second operand has 3 states, 3 states have (on average 644.6666666666666) internal successors, (1934), 3 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:17,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:17,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 644 of 647 [2021-06-10 14:38:17,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:18,649 INFO L129 PetriNetUnfolder]: 0/644 cut-off events. [2021-06-10 14:38:18,649 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:18,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24294 conditions, 644 events. 0/644 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1202 event pairs, 0 based on Foata normal form. 215/859 useless extension candidates. Maximal degree in co-relation 0. Up to 215 conditions per place. [2021-06-10 14:38:18,651 INFO L132 encePairwiseOnDemand]: 645/647 looper letters, 0 selfloop transitions, 1 changer transitions 0/644 dead transitions. [2021-06-10 14:38:18,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1075 places, 644 transitions, 47942 flow [2021-06-10 14:38:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:38:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:38:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1934 transitions. [2021-06-10 14:38:18,652 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.996393611540443 [2021-06-10 14:38:18,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1934 transitions. [2021-06-10 14:38:18,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1934 transitions. [2021-06-10 14:38:18,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:18,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1934 transitions. [2021-06-10 14:38:18,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 644.6666666666666) internal successors, (1934), 3 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:18,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 647.0) internal successors, (2588), 4 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:18,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 647.0) internal successors, (2588), 4 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:18,655 INFO L185 Difference]: Start difference. First operand has 1074 places, 645 transitions, 47942 flow. Second operand 3 states and 1934 transitions. [2021-06-10 14:38:18,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1075 places, 644 transitions, 47942 flow [2021-06-10 14:38:22,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1075 places, 644 transitions, 2360 flow, removed 22791 selfloop flow, removed 0 redundant places. [2021-06-10 14:38:22,967 INFO L241 Difference]: Finished difference. Result has 1075 places, 644 transitions, 2360 flow [2021-06-10 14:38:22,967 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=1073, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2360, PETRI_PLACES=1075, PETRI_TRANSITIONS=644} [2021-06-10 14:38:22,967 INFO L343 CegarLoopForPetriNet]: 1074 programPoint places, 1 predicate places. [2021-06-10 14:38:22,967 INFO L480 AbstractCegarLoop]: Abstraction has has 1075 places, 644 transitions, 2360 flow [2021-06-10 14:38:22,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 644.6666666666666) internal successors, (1934), 3 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:22,967 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:22,967 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:22,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426 [2021-06-10 14:38:22,967 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:22,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:22,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1495679959, now seen corresponding path program 1 times [2021-06-10 14:38:22,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:22,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842744103] [2021-06-10 14:38:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:23,119 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:23,123 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:23,221 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:38:23,221 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:38:23,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427 [2021-06-10 14:38:23,221 WARN L342 ceAbstractionStarter]: 214 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:38:23,221 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 215 thread instances. [2021-06-10 14:38:23,389 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:38:23,389 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:38:23,390 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:38:23,390 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:38:23,390 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:38:23,390 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:38:23,390 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:38:23,390 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:38:23,390 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:38:23,390 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:38:23,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1081 places, 650 transitions, 48385 flow [2021-06-10 14:38:24,908 INFO L129 PetriNetUnfolder]: 0/1295 cut-off events. [2021-06-10 14:38:24,908 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:24,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25161 conditions, 1295 events. 0/1295 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5052 event pairs, 0 based on Foata normal form. 0/1079 useless extension candidates. Maximal degree in co-relation 0. Up to 216 conditions per place. [2021-06-10 14:38:24,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 1081 places, 650 transitions, 48385 flow [2021-06-10 14:38:24,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1079 places, 648 transitions, 48381 flow [2021-06-10 14:38:24,924 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:38:24,924 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:24,924 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:24,924 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:38:24,924 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:24,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:24,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2264579, now seen corresponding path program 1 times [2021-06-10 14:38:24,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:24,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557414735] [2021-06-10 14:38:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:25,056 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:25,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:38:25,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557414735] [2021-06-10 14:38:25,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:25,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:38:25,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798047829] [2021-06-10 14:38:25,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:38:25,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:25,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:38:25,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:38:25,059 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 647 out of 650 [2021-06-10 14:38:25,060 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1079 places, 648 transitions, 48381 flow. Second operand has 3 states, 3 states have (on average 647.6666666666666) internal successors, (1943), 3 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:25,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:25,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 647 of 650 [2021-06-10 14:38:25,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:26,322 INFO L129 PetriNetUnfolder]: 0/647 cut-off events. [2021-06-10 14:38:26,322 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:26,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24515 conditions, 647 events. 0/647 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1287 event pairs, 0 based on Foata normal form. 216/863 useless extension candidates. Maximal degree in co-relation 0. Up to 216 conditions per place. [2021-06-10 14:38:26,324 INFO L132 encePairwiseOnDemand]: 648/650 looper letters, 0 selfloop transitions, 1 changer transitions 0/647 dead transitions. [2021-06-10 14:38:26,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1080 places, 647 transitions, 48381 flow [2021-06-10 14:38:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:38:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:38:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1943 transitions. [2021-06-10 14:38:26,325 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9964102564102564 [2021-06-10 14:38:26,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1943 transitions. [2021-06-10 14:38:26,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1943 transitions. [2021-06-10 14:38:26,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:26,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1943 transitions. [2021-06-10 14:38:26,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 647.6666666666666) internal successors, (1943), 3 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:26,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:26,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:26,327 INFO L185 Difference]: Start difference. First operand has 1079 places, 648 transitions, 48381 flow. Second operand 3 states and 1943 transitions. [2021-06-10 14:38:26,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1080 places, 647 transitions, 48381 flow [2021-06-10 14:38:30,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1080 places, 647 transitions, 2371 flow, removed 23005 selfloop flow, removed 0 redundant places. [2021-06-10 14:38:30,721 INFO L241 Difference]: Finished difference. Result has 1080 places, 647 transitions, 2371 flow [2021-06-10 14:38:30,721 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=2369, PETRI_DIFFERENCE_MINUEND_PLACES=1078, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2371, PETRI_PLACES=1080, PETRI_TRANSITIONS=647} [2021-06-10 14:38:30,721 INFO L343 CegarLoopForPetriNet]: 1079 programPoint places, 1 predicate places. [2021-06-10 14:38:30,721 INFO L480 AbstractCegarLoop]: Abstraction has has 1080 places, 647 transitions, 2371 flow [2021-06-10 14:38:30,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 647.6666666666666) internal successors, (1943), 3 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:30,722 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:30,722 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:30,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428 [2021-06-10 14:38:30,722 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:30,722 INFO L82 PathProgramCache]: Analyzing trace with hash -208261883, now seen corresponding path program 1 times [2021-06-10 14:38:30,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:30,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83469966] [2021-06-10 14:38:30,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:30,849 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:30,852 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:30,948 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:38:30,949 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:38:30,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429 [2021-06-10 14:38:30,949 WARN L342 ceAbstractionStarter]: 215 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:38:30,949 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 216 thread instances. [2021-06-10 14:38:31,110 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:38:31,110 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:38:31,110 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:38:31,111 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:38:31,111 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:38:31,111 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:38:31,111 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:38:31,111 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:38:31,111 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:38:31,111 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:38:31,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1086 places, 653 transitions, 48826 flow [2021-06-10 14:38:32,579 INFO L129 PetriNetUnfolder]: 0/1301 cut-off events. [2021-06-10 14:38:32,580 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:32,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25386 conditions, 1301 events. 0/1301 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5127 event pairs, 0 based on Foata normal form. 0/1084 useless extension candidates. Maximal degree in co-relation 0. Up to 217 conditions per place. [2021-06-10 14:38:32,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 1086 places, 653 transitions, 48826 flow [2021-06-10 14:38:32,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1084 places, 651 transitions, 48822 flow [2021-06-10 14:38:32,595 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:38:32,595 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:32,595 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:32,595 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:38:32,595 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:32,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2285475, now seen corresponding path program 1 times [2021-06-10 14:38:32,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:32,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656998179] [2021-06-10 14:38:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:32,720 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:32,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:38:32,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656998179] [2021-06-10 14:38:32,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:32,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:38:32,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719684486] [2021-06-10 14:38:32,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:38:32,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:32,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:38:32,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:38:32,724 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 650 out of 653 [2021-06-10 14:38:32,724 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1084 places, 651 transitions, 48822 flow. Second operand has 3 states, 3 states have (on average 650.6666666666666) internal successors, (1952), 3 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:32,724 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:32,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 650 of 653 [2021-06-10 14:38:32,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:33,946 INFO L129 PetriNetUnfolder]: 0/650 cut-off events. [2021-06-10 14:38:33,946 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:33,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24737 conditions, 650 events. 0/650 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1186 event pairs, 0 based on Foata normal form. 217/867 useless extension candidates. Maximal degree in co-relation 0. Up to 217 conditions per place. [2021-06-10 14:38:33,948 INFO L132 encePairwiseOnDemand]: 651/653 looper letters, 0 selfloop transitions, 1 changer transitions 0/650 dead transitions. [2021-06-10 14:38:33,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1085 places, 650 transitions, 48822 flow [2021-06-10 14:38:33,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:38:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:38:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1952 transitions. [2021-06-10 14:38:33,949 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9964267483409903 [2021-06-10 14:38:33,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1952 transitions. [2021-06-10 14:38:33,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1952 transitions. [2021-06-10 14:38:33,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:33,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1952 transitions. [2021-06-10 14:38:33,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 650.6666666666666) internal successors, (1952), 3 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:33,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 653.0) internal successors, (2612), 4 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:33,951 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 653.0) internal successors, (2612), 4 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:33,951 INFO L185 Difference]: Start difference. First operand has 1084 places, 651 transitions, 48822 flow. Second operand 3 states and 1952 transitions. [2021-06-10 14:38:33,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1085 places, 650 transitions, 48822 flow [2021-06-10 14:38:38,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1085 places, 650 transitions, 2382 flow, removed 23220 selfloop flow, removed 0 redundant places. [2021-06-10 14:38:38,378 INFO L241 Difference]: Finished difference. Result has 1085 places, 650 transitions, 2382 flow [2021-06-10 14:38:38,378 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=653, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=1083, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2382, PETRI_PLACES=1085, PETRI_TRANSITIONS=650} [2021-06-10 14:38:38,378 INFO L343 CegarLoopForPetriNet]: 1084 programPoint places, 1 predicate places. [2021-06-10 14:38:38,378 INFO L480 AbstractCegarLoop]: Abstraction has has 1085 places, 650 transitions, 2382 flow [2021-06-10 14:38:38,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 650.6666666666666) internal successors, (1952), 3 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:38,378 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:38,378 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:38,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430 [2021-06-10 14:38:38,378 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:38,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:38,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1802921492, now seen corresponding path program 1 times [2021-06-10 14:38:38,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:38,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320818383] [2021-06-10 14:38:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:38,505 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:38,508 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:38,604 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:38:38,604 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:38:38,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431 [2021-06-10 14:38:38,604 WARN L342 ceAbstractionStarter]: 216 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:38:38,604 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 217 thread instances. [2021-06-10 14:38:38,764 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:38:38,764 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:38:38,764 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:38:38,764 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:38:38,764 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:38:38,764 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:38:38,764 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:38:38,764 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:38:38,764 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:38:38,764 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:38:38,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1091 places, 656 transitions, 49269 flow [2021-06-10 14:38:40,230 INFO L129 PetriNetUnfolder]: 0/1307 cut-off events. [2021-06-10 14:38:40,230 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:40,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25612 conditions, 1307 events. 0/1307 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4981 event pairs, 0 based on Foata normal form. 0/1089 useless extension candidates. Maximal degree in co-relation 0. Up to 218 conditions per place. [2021-06-10 14:38:40,230 INFO L82 GeneralOperation]: Start removeDead. Operand has 1091 places, 656 transitions, 49269 flow [2021-06-10 14:38:40,244 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1089 places, 654 transitions, 49265 flow [2021-06-10 14:38:40,245 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:38:40,245 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:40,245 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:40,245 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:38:40,245 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:40,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:40,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2306467, now seen corresponding path program 1 times [2021-06-10 14:38:40,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:40,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242986973] [2021-06-10 14:38:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:40,370 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:40,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:38:40,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242986973] [2021-06-10 14:38:40,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:40,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:38:40,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787739105] [2021-06-10 14:38:40,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:38:40,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:40,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:38:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:38:40,373 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 653 out of 656 [2021-06-10 14:38:40,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1089 places, 654 transitions, 49265 flow. Second operand has 3 states, 3 states have (on average 653.6666666666666) internal successors, (1961), 3 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:40,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:40,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 653 of 656 [2021-06-10 14:38:40,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:41,520 INFO L129 PetriNetUnfolder]: 0/653 cut-off events. [2021-06-10 14:38:41,520 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:41,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24960 conditions, 653 events. 0/653 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1292 event pairs, 0 based on Foata normal form. 218/871 useless extension candidates. Maximal degree in co-relation 0. Up to 218 conditions per place. [2021-06-10 14:38:41,523 INFO L132 encePairwiseOnDemand]: 654/656 looper letters, 0 selfloop transitions, 1 changer transitions 0/653 dead transitions. [2021-06-10 14:38:41,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1090 places, 653 transitions, 49265 flow [2021-06-10 14:38:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:38:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:38:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1961 transitions. [2021-06-10 14:38:41,524 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9964430894308943 [2021-06-10 14:38:41,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1961 transitions. [2021-06-10 14:38:41,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1961 transitions. [2021-06-10 14:38:41,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:41,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1961 transitions. [2021-06-10 14:38:41,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 653.6666666666666) internal successors, (1961), 3 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:41,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:41,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:41,526 INFO L185 Difference]: Start difference. First operand has 1089 places, 654 transitions, 49265 flow. Second operand 3 states and 1961 transitions. [2021-06-10 14:38:41,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1090 places, 653 transitions, 49265 flow [2021-06-10 14:38:46,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1090 places, 653 transitions, 2393 flow, removed 23436 selfloop flow, removed 0 redundant places. [2021-06-10 14:38:46,074 INFO L241 Difference]: Finished difference. Result has 1090 places, 653 transitions, 2393 flow [2021-06-10 14:38:46,074 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=1088, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2393, PETRI_PLACES=1090, PETRI_TRANSITIONS=653} [2021-06-10 14:38:46,074 INFO L343 CegarLoopForPetriNet]: 1089 programPoint places, 1 predicate places. [2021-06-10 14:38:46,074 INFO L480 AbstractCegarLoop]: Abstraction has has 1090 places, 653 transitions, 2393 flow [2021-06-10 14:38:46,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 653.6666666666666) internal successors, (1961), 3 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:46,074 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:46,074 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:46,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable432 [2021-06-10 14:38:46,075 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:46,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:46,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1509059137, now seen corresponding path program 1 times [2021-06-10 14:38:46,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:46,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267861543] [2021-06-10 14:38:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:46,202 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:46,205 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:46,304 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:38:46,304 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:38:46,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable433 [2021-06-10 14:38:46,304 WARN L342 ceAbstractionStarter]: 217 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:38:46,304 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 218 thread instances. [2021-06-10 14:38:46,464 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:38:46,464 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:38:46,465 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:38:46,465 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:38:46,465 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:38:46,465 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:38:46,465 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:38:46,465 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:38:46,465 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:38:46,465 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:38:46,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1096 places, 659 transitions, 49714 flow [2021-06-10 14:38:47,941 INFO L129 PetriNetUnfolder]: 0/1313 cut-off events. [2021-06-10 14:38:47,941 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:47,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25839 conditions, 1313 events. 0/1313 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5098 event pairs, 0 based on Foata normal form. 0/1094 useless extension candidates. Maximal degree in co-relation 0. Up to 219 conditions per place. [2021-06-10 14:38:47,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 1096 places, 659 transitions, 49714 flow [2021-06-10 14:38:47,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1094 places, 657 transitions, 49710 flow [2021-06-10 14:38:47,957 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:38:47,957 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:47,957 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:47,957 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:38:47,957 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2327555, now seen corresponding path program 1 times [2021-06-10 14:38:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:47,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073289119] [2021-06-10 14:38:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:48,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:48,155 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:38:48,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073289119] [2021-06-10 14:38:48,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:48,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:38:48,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038009732] [2021-06-10 14:38:48,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:38:48,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:48,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:38:48,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:38:48,158 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 656 out of 659 [2021-06-10 14:38:48,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1094 places, 657 transitions, 49710 flow. Second operand has 3 states, 3 states have (on average 656.6666666666666) internal successors, (1970), 3 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:48,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:48,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 656 of 659 [2021-06-10 14:38:48,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:49,441 INFO L129 PetriNetUnfolder]: 0/656 cut-off events. [2021-06-10 14:38:49,441 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:49,441 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25184 conditions, 656 events. 0/656 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1459 event pairs, 0 based on Foata normal form. 219/875 useless extension candidates. Maximal degree in co-relation 0. Up to 219 conditions per place. [2021-06-10 14:38:49,444 INFO L132 encePairwiseOnDemand]: 657/659 looper letters, 0 selfloop transitions, 1 changer transitions 0/656 dead transitions. [2021-06-10 14:38:49,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1095 places, 656 transitions, 49710 flow [2021-06-10 14:38:49,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:38:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:38:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1970 transitions. [2021-06-10 14:38:49,444 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9964592817400101 [2021-06-10 14:38:49,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1970 transitions. [2021-06-10 14:38:49,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1970 transitions. [2021-06-10 14:38:49,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:49,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1970 transitions. [2021-06-10 14:38:49,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 656.6666666666666) internal successors, (1970), 3 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:49,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 659.0) internal successors, (2636), 4 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:49,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 659.0) internal successors, (2636), 4 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:49,448 INFO L185 Difference]: Start difference. First operand has 1094 places, 657 transitions, 49710 flow. Second operand 3 states and 1970 transitions. [2021-06-10 14:38:49,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1095 places, 656 transitions, 49710 flow [2021-06-10 14:38:53,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1095 places, 656 transitions, 2404 flow, removed 23653 selfloop flow, removed 0 redundant places. [2021-06-10 14:38:53,972 INFO L241 Difference]: Finished difference. Result has 1095 places, 656 transitions, 2404 flow [2021-06-10 14:38:53,972 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=1093, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2404, PETRI_PLACES=1095, PETRI_TRANSITIONS=656} [2021-06-10 14:38:53,973 INFO L343 CegarLoopForPetriNet]: 1094 programPoint places, 1 predicate places. [2021-06-10 14:38:53,973 INFO L480 AbstractCegarLoop]: Abstraction has has 1095 places, 656 transitions, 2404 flow [2021-06-10 14:38:53,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 656.6666666666666) internal successors, (1970), 3 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:53,973 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:53,973 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:38:53,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434 [2021-06-10 14:38:53,973 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:53,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1488821615, now seen corresponding path program 1 times [2021-06-10 14:38:53,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:53,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074681084] [2021-06-10 14:38:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:54,108 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:38:54,111 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:38:54,209 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:38:54,209 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:38:54,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435 [2021-06-10 14:38:54,209 WARN L342 ceAbstractionStarter]: 218 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:38:54,209 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 219 thread instances. [2021-06-10 14:38:54,370 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:38:54,370 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:38:54,371 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:38:54,371 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:38:54,371 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:38:54,371 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:38:54,371 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:38:54,371 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:38:54,371 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:38:54,371 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:38:54,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 662 transitions, 50161 flow [2021-06-10 14:38:56,150 INFO L129 PetriNetUnfolder]: 0/1319 cut-off events. [2021-06-10 14:38:56,150 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:56,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26067 conditions, 1319 events. 0/1319 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5151 event pairs, 0 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 0. Up to 220 conditions per place. [2021-06-10 14:38:56,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 1101 places, 662 transitions, 50161 flow [2021-06-10 14:38:56,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1099 places, 660 transitions, 50157 flow [2021-06-10 14:38:56,167 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:38:56,167 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:56,168 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:38:56,168 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:38:56,168 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:38:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:38:56,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2348739, now seen corresponding path program 1 times [2021-06-10 14:38:56,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:38:56,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122099698] [2021-06-10 14:38:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:38:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:38:56,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:38:56,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:38:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:38:56,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122099698] [2021-06-10 14:38:56,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:38:56,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:38:56,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900697388] [2021-06-10 14:38:56,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:38:56,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:38:56,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:38:56,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:38:56,319 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 659 out of 662 [2021-06-10 14:38:56,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1099 places, 660 transitions, 50157 flow. Second operand has 3 states, 3 states have (on average 659.6666666666666) internal successors, (1979), 3 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:56,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:38:56,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 659 of 662 [2021-06-10 14:38:56,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:38:57,809 INFO L129 PetriNetUnfolder]: 0/659 cut-off events. [2021-06-10 14:38:57,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:38:57,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25409 conditions, 659 events. 0/659 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1274 event pairs, 0 based on Foata normal form. 220/879 useless extension candidates. Maximal degree in co-relation 0. Up to 220 conditions per place. [2021-06-10 14:38:57,812 INFO L132 encePairwiseOnDemand]: 660/662 looper letters, 0 selfloop transitions, 1 changer transitions 0/659 dead transitions. [2021-06-10 14:38:57,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1100 places, 659 transitions, 50157 flow [2021-06-10 14:38:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:38:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:38:57,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1979 transitions. [2021-06-10 14:38:57,812 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9964753272910373 [2021-06-10 14:38:57,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1979 transitions. [2021-06-10 14:38:57,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1979 transitions. [2021-06-10 14:38:57,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:38:57,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1979 transitions. [2021-06-10 14:38:57,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 659.6666666666666) internal successors, (1979), 3 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:57,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 662.0) internal successors, (2648), 4 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:57,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 662.0) internal successors, (2648), 4 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:38:57,815 INFO L185 Difference]: Start difference. First operand has 1099 places, 660 transitions, 50157 flow. Second operand 3 states and 1979 transitions. [2021-06-10 14:38:57,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1100 places, 659 transitions, 50157 flow [2021-06-10 14:39:02,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1100 places, 659 transitions, 2415 flow, removed 23871 selfloop flow, removed 0 redundant places. [2021-06-10 14:39:02,305 INFO L241 Difference]: Finished difference. Result has 1100 places, 659 transitions, 2415 flow [2021-06-10 14:39:02,306 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=662, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=1098, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2415, PETRI_PLACES=1100, PETRI_TRANSITIONS=659} [2021-06-10 14:39:02,306 INFO L343 CegarLoopForPetriNet]: 1099 programPoint places, 1 predicate places. [2021-06-10 14:39:02,306 INFO L480 AbstractCegarLoop]: Abstraction has has 1100 places, 659 transitions, 2415 flow [2021-06-10 14:39:02,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 659.6666666666666) internal successors, (1979), 3 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:02,306 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:02,306 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:39:02,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436 [2021-06-10 14:39:02,306 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash -991655863, now seen corresponding path program 1 times [2021-06-10 14:39:02,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:02,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519187506] [2021-06-10 14:39:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:02,626 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:02,629 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:02,710 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:39:02,710 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:39:02,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437 [2021-06-10 14:39:02,711 WARN L342 ceAbstractionStarter]: 219 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:39:02,711 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 220 thread instances. [2021-06-10 14:39:02,877 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:39:02,878 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:39:02,878 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:39:02,878 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:39:02,878 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:39:02,878 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:39:02,878 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:39:02,878 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:39:02,878 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:39:02,878 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:39:02,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1106 places, 665 transitions, 50610 flow [2021-06-10 14:39:04,543 INFO L129 PetriNetUnfolder]: 0/1325 cut-off events. [2021-06-10 14:39:04,543 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:04,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26296 conditions, 1325 events. 0/1325 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5150 event pairs, 0 based on Foata normal form. 0/1104 useless extension candidates. Maximal degree in co-relation 0. Up to 221 conditions per place. [2021-06-10 14:39:04,543 INFO L82 GeneralOperation]: Start removeDead. Operand has 1106 places, 665 transitions, 50610 flow [2021-06-10 14:39:04,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1104 places, 663 transitions, 50606 flow [2021-06-10 14:39:04,559 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:39:04,559 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:04,559 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:04,559 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:39:04,559 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:04,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2370019, now seen corresponding path program 1 times [2021-06-10 14:39:04,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:04,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247669890] [2021-06-10 14:39:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:39:04,951 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:39:04,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:39:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:39:04,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247669890] [2021-06-10 14:39:04,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:39:04,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:39:04,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363318617] [2021-06-10 14:39:04,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:39:04,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:39:04,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:39:04,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:39:04,955 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 662 out of 665 [2021-06-10 14:39:04,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1104 places, 663 transitions, 50606 flow. Second operand has 3 states, 3 states have (on average 662.6666666666666) internal successors, (1988), 3 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:04,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:39:04,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 662 of 665 [2021-06-10 14:39:04,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:39:06,616 INFO L129 PetriNetUnfolder]: 0/662 cut-off events. [2021-06-10 14:39:06,616 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:06,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25635 conditions, 662 events. 0/662 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1371 event pairs, 0 based on Foata normal form. 221/883 useless extension candidates. Maximal degree in co-relation 0. Up to 221 conditions per place. [2021-06-10 14:39:06,619 INFO L132 encePairwiseOnDemand]: 663/665 looper letters, 0 selfloop transitions, 1 changer transitions 0/662 dead transitions. [2021-06-10 14:39:06,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1105 places, 662 transitions, 50606 flow [2021-06-10 14:39:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:39:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:39:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1988 transitions. [2021-06-10 14:39:06,620 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9964912280701754 [2021-06-10 14:39:06,620 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1988 transitions. [2021-06-10 14:39:06,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1988 transitions. [2021-06-10 14:39:06,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:39:06,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1988 transitions. [2021-06-10 14:39:06,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 662.6666666666666) internal successors, (1988), 3 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:06,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 665.0) internal successors, (2660), 4 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:06,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 665.0) internal successors, (2660), 4 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:06,622 INFO L185 Difference]: Start difference. First operand has 1104 places, 663 transitions, 50606 flow. Second operand 3 states and 1988 transitions. [2021-06-10 14:39:06,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1105 places, 662 transitions, 50606 flow [2021-06-10 14:39:11,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1105 places, 662 transitions, 2426 flow, removed 24090 selfloop flow, removed 0 redundant places. [2021-06-10 14:39:11,416 INFO L241 Difference]: Finished difference. Result has 1105 places, 662 transitions, 2426 flow [2021-06-10 14:39:11,416 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=665, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=1103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2426, PETRI_PLACES=1105, PETRI_TRANSITIONS=662} [2021-06-10 14:39:11,416 INFO L343 CegarLoopForPetriNet]: 1104 programPoint places, 1 predicate places. [2021-06-10 14:39:11,416 INFO L480 AbstractCegarLoop]: Abstraction has has 1105 places, 662 transitions, 2426 flow [2021-06-10 14:39:11,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 662.6666666666666) internal successors, (1988), 3 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:11,416 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:11,417 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:39:11,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438 [2021-06-10 14:39:11,417 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:11,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1694221106, now seen corresponding path program 1 times [2021-06-10 14:39:11,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:11,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580493815] [2021-06-10 14:39:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:11,547 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:11,550 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:11,650 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:39:11,651 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:39:11,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439 [2021-06-10 14:39:11,651 WARN L342 ceAbstractionStarter]: 220 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:39:11,651 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 221 thread instances. [2021-06-10 14:39:12,048 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:39:12,048 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:39:12,048 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:39:12,048 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:39:12,048 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:39:12,048 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:39:12,048 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:39:12,048 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:39:12,048 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:39:12,048 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:39:12,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1111 places, 668 transitions, 51061 flow [2021-06-10 14:39:13,727 INFO L129 PetriNetUnfolder]: 0/1331 cut-off events. [2021-06-10 14:39:13,727 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:13,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26526 conditions, 1331 events. 0/1331 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4965 event pairs, 0 based on Foata normal form. 0/1109 useless extension candidates. Maximal degree in co-relation 0. Up to 222 conditions per place. [2021-06-10 14:39:13,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 1111 places, 668 transitions, 51061 flow [2021-06-10 14:39:13,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1109 places, 666 transitions, 51057 flow [2021-06-10 14:39:13,744 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:39:13,744 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:13,744 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:13,744 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:39:13,744 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:13,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2391395, now seen corresponding path program 1 times [2021-06-10 14:39:13,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:13,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985186369] [2021-06-10 14:39:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:39:13,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:39:13,894 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:39:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:39:13,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985186369] [2021-06-10 14:39:13,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:39:13,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:39:13,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614435016] [2021-06-10 14:39:13,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:39:13,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:39:13,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:39:13,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:39:13,897 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 665 out of 668 [2021-06-10 14:39:13,898 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1109 places, 666 transitions, 51057 flow. Second operand has 3 states, 3 states have (on average 665.6666666666666) internal successors, (1997), 3 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:13,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:39:13,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 665 of 668 [2021-06-10 14:39:13,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:39:15,417 INFO L129 PetriNetUnfolder]: 0/665 cut-off events. [2021-06-10 14:39:15,417 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:15,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25862 conditions, 665 events. 0/665 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1302 event pairs, 0 based on Foata normal form. 222/887 useless extension candidates. Maximal degree in co-relation 0. Up to 222 conditions per place. [2021-06-10 14:39:15,420 INFO L132 encePairwiseOnDemand]: 666/668 looper letters, 0 selfloop transitions, 1 changer transitions 0/665 dead transitions. [2021-06-10 14:39:15,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1110 places, 665 transitions, 51057 flow [2021-06-10 14:39:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:39:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:39:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1997 transitions. [2021-06-10 14:39:15,420 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9965069860279441 [2021-06-10 14:39:15,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1997 transitions. [2021-06-10 14:39:15,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1997 transitions. [2021-06-10 14:39:15,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:39:15,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1997 transitions. [2021-06-10 14:39:15,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 665.6666666666666) internal successors, (1997), 3 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:15,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 668.0) internal successors, (2672), 4 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:15,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 668.0) internal successors, (2672), 4 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:15,423 INFO L185 Difference]: Start difference. First operand has 1109 places, 666 transitions, 51057 flow. Second operand 3 states and 1997 transitions. [2021-06-10 14:39:15,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1110 places, 665 transitions, 51057 flow [2021-06-10 14:39:20,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1110 places, 665 transitions, 2437 flow, removed 24310 selfloop flow, removed 0 redundant places. [2021-06-10 14:39:20,057 INFO L241 Difference]: Finished difference. Result has 1110 places, 665 transitions, 2437 flow [2021-06-10 14:39:20,057 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=668, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=1108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2437, PETRI_PLACES=1110, PETRI_TRANSITIONS=665} [2021-06-10 14:39:20,057 INFO L343 CegarLoopForPetriNet]: 1109 programPoint places, 1 predicate places. [2021-06-10 14:39:20,057 INFO L480 AbstractCegarLoop]: Abstraction has has 1110 places, 665 transitions, 2437 flow [2021-06-10 14:39:20,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 665.6666666666666) internal successors, (1997), 3 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:20,058 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:20,058 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:39:20,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440 [2021-06-10 14:39:20,058 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:20,058 INFO L82 PathProgramCache]: Analyzing trace with hash 868723357, now seen corresponding path program 1 times [2021-06-10 14:39:20,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:20,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508506737] [2021-06-10 14:39:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:20,426 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:20,429 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:20,540 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:39:20,540 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:39:20,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441 [2021-06-10 14:39:20,540 WARN L342 ceAbstractionStarter]: 221 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:39:20,540 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 222 thread instances. [2021-06-10 14:39:20,735 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:39:20,735 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:39:20,735 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:39:20,736 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:39:20,736 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:39:20,736 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:39:20,736 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:39:20,736 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:39:20,736 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:39:20,736 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:39:20,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1116 places, 671 transitions, 51514 flow [2021-06-10 14:39:22,364 INFO L129 PetriNetUnfolder]: 0/1337 cut-off events. [2021-06-10 14:39:22,364 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:22,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26757 conditions, 1337 events. 0/1337 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5209 event pairs, 0 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 0. Up to 223 conditions per place. [2021-06-10 14:39:22,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 1116 places, 671 transitions, 51514 flow [2021-06-10 14:39:22,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1114 places, 669 transitions, 51510 flow [2021-06-10 14:39:22,381 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:39:22,381 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:22,381 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:22,381 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:39:22,381 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:22,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2412867, now seen corresponding path program 1 times [2021-06-10 14:39:22,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:22,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026564757] [2021-06-10 14:39:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:39:22,546 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:39:22,546 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:39:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:39:22,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026564757] [2021-06-10 14:39:22,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:39:22,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:39:22,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240411020] [2021-06-10 14:39:22,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:39:22,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:39:22,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:39:22,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:39:22,549 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 668 out of 671 [2021-06-10 14:39:22,550 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1114 places, 669 transitions, 51510 flow. Second operand has 3 states, 3 states have (on average 668.6666666666666) internal successors, (2006), 3 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:22,550 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:39:22,550 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 668 of 671 [2021-06-10 14:39:22,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:39:23,897 INFO L129 PetriNetUnfolder]: 0/668 cut-off events. [2021-06-10 14:39:23,897 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:23,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26090 conditions, 668 events. 0/668 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1291 event pairs, 0 based on Foata normal form. 223/891 useless extension candidates. Maximal degree in co-relation 0. Up to 223 conditions per place. [2021-06-10 14:39:23,899 INFO L132 encePairwiseOnDemand]: 669/671 looper letters, 0 selfloop transitions, 1 changer transitions 0/668 dead transitions. [2021-06-10 14:39:23,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1115 places, 668 transitions, 51510 flow [2021-06-10 14:39:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:39:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:39:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2006 transitions. [2021-06-10 14:39:23,900 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9965226030799801 [2021-06-10 14:39:23,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2006 transitions. [2021-06-10 14:39:23,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2006 transitions. [2021-06-10 14:39:23,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:39:23,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2006 transitions. [2021-06-10 14:39:23,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 668.6666666666666) internal successors, (2006), 3 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:23,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 671.0) internal successors, (2684), 4 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:23,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 671.0) internal successors, (2684), 4 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:23,902 INFO L185 Difference]: Start difference. First operand has 1114 places, 669 transitions, 51510 flow. Second operand 3 states and 2006 transitions. [2021-06-10 14:39:23,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1115 places, 668 transitions, 51510 flow [2021-06-10 14:39:28,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1115 places, 668 transitions, 2448 flow, removed 24531 selfloop flow, removed 0 redundant places. [2021-06-10 14:39:28,984 INFO L241 Difference]: Finished difference. Result has 1115 places, 668 transitions, 2448 flow [2021-06-10 14:39:28,984 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=671, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=1113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2448, PETRI_PLACES=1115, PETRI_TRANSITIONS=668} [2021-06-10 14:39:28,984 INFO L343 CegarLoopForPetriNet]: 1114 programPoint places, 1 predicate places. [2021-06-10 14:39:28,984 INFO L480 AbstractCegarLoop]: Abstraction has has 1115 places, 668 transitions, 2448 flow [2021-06-10 14:39:28,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 668.6666666666666) internal successors, (2006), 3 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:28,984 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:28,984 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:39:28,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442 [2021-06-10 14:39:28,985 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash 857982901, now seen corresponding path program 1 times [2021-06-10 14:39:28,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:28,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501918864] [2021-06-10 14:39:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:29,139 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:29,142 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:29,250 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:39:29,251 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:39:29,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443 [2021-06-10 14:39:29,251 WARN L342 ceAbstractionStarter]: 222 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:39:29,251 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 223 thread instances. [2021-06-10 14:39:29,414 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:39:29,415 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:39:29,415 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:39:29,415 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:39:29,415 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:39:29,415 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:39:29,415 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:39:29,415 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:39:29,415 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:39:29,415 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:39:29,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1121 places, 674 transitions, 51969 flow [2021-06-10 14:39:30,962 INFO L129 PetriNetUnfolder]: 0/1343 cut-off events. [2021-06-10 14:39:30,962 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:30,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26989 conditions, 1343 events. 0/1343 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5272 event pairs, 0 based on Foata normal form. 0/1119 useless extension candidates. Maximal degree in co-relation 0. Up to 224 conditions per place. [2021-06-10 14:39:30,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 1121 places, 674 transitions, 51969 flow [2021-06-10 14:39:30,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1119 places, 672 transitions, 51965 flow [2021-06-10 14:39:30,978 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:39:30,978 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:30,978 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:30,978 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:39:30,978 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:30,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:30,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2434435, now seen corresponding path program 1 times [2021-06-10 14:39:30,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:30,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018924685] [2021-06-10 14:39:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:39:31,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:39:31,244 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:39:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:39:31,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018924685] [2021-06-10 14:39:31,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:39:31,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:39:31,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845370981] [2021-06-10 14:39:31,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:39:31,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:39:31,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:39:31,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:39:31,247 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 671 out of 674 [2021-06-10 14:39:31,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1119 places, 672 transitions, 51965 flow. Second operand has 3 states, 3 states have (on average 671.6666666666666) internal successors, (2015), 3 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:31,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:39:31,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 671 of 674 [2021-06-10 14:39:31,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:39:32,588 INFO L129 PetriNetUnfolder]: 0/671 cut-off events. [2021-06-10 14:39:32,588 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:32,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26319 conditions, 671 events. 0/671 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1318 event pairs, 0 based on Foata normal form. 224/895 useless extension candidates. Maximal degree in co-relation 0. Up to 224 conditions per place. [2021-06-10 14:39:32,591 INFO L132 encePairwiseOnDemand]: 672/674 looper letters, 0 selfloop transitions, 1 changer transitions 0/671 dead transitions. [2021-06-10 14:39:32,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1120 places, 671 transitions, 51965 flow [2021-06-10 14:39:32,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:39:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:39:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2015 transitions. [2021-06-10 14:39:32,592 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.996538081107814 [2021-06-10 14:39:32,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2015 transitions. [2021-06-10 14:39:32,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2015 transitions. [2021-06-10 14:39:32,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:39:32,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2015 transitions. [2021-06-10 14:39:32,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 671.6666666666666) internal successors, (2015), 3 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:32,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 674.0) internal successors, (2696), 4 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:32,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 674.0) internal successors, (2696), 4 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:32,594 INFO L185 Difference]: Start difference. First operand has 1119 places, 672 transitions, 51965 flow. Second operand 3 states and 2015 transitions. [2021-06-10 14:39:32,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1120 places, 671 transitions, 51965 flow [2021-06-10 14:39:37,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1120 places, 671 transitions, 2459 flow, removed 24753 selfloop flow, removed 0 redundant places. [2021-06-10 14:39:37,522 INFO L241 Difference]: Finished difference. Result has 1120 places, 671 transitions, 2459 flow [2021-06-10 14:39:37,522 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=674, PETRI_DIFFERENCE_MINUEND_FLOW=2457, PETRI_DIFFERENCE_MINUEND_PLACES=1118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2459, PETRI_PLACES=1120, PETRI_TRANSITIONS=671} [2021-06-10 14:39:37,522 INFO L343 CegarLoopForPetriNet]: 1119 programPoint places, 1 predicate places. [2021-06-10 14:39:37,522 INFO L480 AbstractCegarLoop]: Abstraction has has 1120 places, 671 transitions, 2459 flow [2021-06-10 14:39:37,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 671.6666666666666) internal successors, (2015), 3 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:37,523 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:37,523 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:39:37,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable444 [2021-06-10 14:39:37,523 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:37,523 INFO L82 PathProgramCache]: Analyzing trace with hash 77935805, now seen corresponding path program 1 times [2021-06-10 14:39:37,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:37,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589362782] [2021-06-10 14:39:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:37,686 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:37,689 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:37,800 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:39:37,800 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:39:37,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445 [2021-06-10 14:39:37,800 WARN L342 ceAbstractionStarter]: 223 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:39:37,800 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 224 thread instances. [2021-06-10 14:39:38,191 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:39:38,191 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:39:38,191 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:39:38,191 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:39:38,191 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:39:38,191 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:39:38,191 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:39:38,191 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:39:38,191 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:39:38,191 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:39:38,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1126 places, 677 transitions, 52426 flow [2021-06-10 14:39:39,951 INFO L129 PetriNetUnfolder]: 0/1349 cut-off events. [2021-06-10 14:39:39,951 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:39,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27222 conditions, 1349 events. 0/1349 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5399 event pairs, 0 based on Foata normal form. 0/1124 useless extension candidates. Maximal degree in co-relation 0. Up to 225 conditions per place. [2021-06-10 14:39:39,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 1126 places, 677 transitions, 52426 flow [2021-06-10 14:39:39,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1124 places, 675 transitions, 52422 flow [2021-06-10 14:39:39,969 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:39:39,969 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:39,969 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:39,969 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:39:39,969 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:39,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:39,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2456099, now seen corresponding path program 1 times [2021-06-10 14:39:39,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:39,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604747612] [2021-06-10 14:39:39,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:39:40,133 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:39:40,133 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:39:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:39:40,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604747612] [2021-06-10 14:39:40,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:39:40,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:39:40,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115821686] [2021-06-10 14:39:40,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:39:40,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:39:40,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:39:40,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:39:40,136 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 674 out of 677 [2021-06-10 14:39:40,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1124 places, 675 transitions, 52422 flow. Second operand has 3 states, 3 states have (on average 674.6666666666666) internal successors, (2024), 3 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:40,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:39:40,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 674 of 677 [2021-06-10 14:39:40,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:39:41,624 INFO L129 PetriNetUnfolder]: 0/674 cut-off events. [2021-06-10 14:39:41,624 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:41,624 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26549 conditions, 674 events. 0/674 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1235 event pairs, 0 based on Foata normal form. 225/899 useless extension candidates. Maximal degree in co-relation 0. Up to 225 conditions per place. [2021-06-10 14:39:41,627 INFO L132 encePairwiseOnDemand]: 675/677 looper letters, 0 selfloop transitions, 1 changer transitions 0/674 dead transitions. [2021-06-10 14:39:41,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1125 places, 674 transitions, 52422 flow [2021-06-10 14:39:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:39:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:39:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2024 transitions. [2021-06-10 14:39:41,628 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9965534219596258 [2021-06-10 14:39:41,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2024 transitions. [2021-06-10 14:39:41,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2024 transitions. [2021-06-10 14:39:41,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:39:41,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2024 transitions. [2021-06-10 14:39:41,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 674.6666666666666) internal successors, (2024), 3 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:41,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 677.0) internal successors, (2708), 4 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:41,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 677.0) internal successors, (2708), 4 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:41,630 INFO L185 Difference]: Start difference. First operand has 1124 places, 675 transitions, 52422 flow. Second operand 3 states and 2024 transitions. [2021-06-10 14:39:41,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1125 places, 674 transitions, 52422 flow [2021-06-10 14:39:46,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1125 places, 674 transitions, 2470 flow, removed 24976 selfloop flow, removed 0 redundant places. [2021-06-10 14:39:46,874 INFO L241 Difference]: Finished difference. Result has 1125 places, 674 transitions, 2470 flow [2021-06-10 14:39:46,874 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=1123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2470, PETRI_PLACES=1125, PETRI_TRANSITIONS=674} [2021-06-10 14:39:46,874 INFO L343 CegarLoopForPetriNet]: 1124 programPoint places, 1 predicate places. [2021-06-10 14:39:46,874 INFO L480 AbstractCegarLoop]: Abstraction has has 1125 places, 674 transitions, 2470 flow [2021-06-10 14:39:46,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 674.6666666666666) internal successors, (2024), 3 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:46,874 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:46,875 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:39:46,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446 [2021-06-10 14:39:46,875 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:46,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2027890552, now seen corresponding path program 1 times [2021-06-10 14:39:46,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:46,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571636920] [2021-06-10 14:39:46,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:47,030 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:47,034 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:47,146 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:39:47,146 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:39:47,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447 [2021-06-10 14:39:47,146 WARN L342 ceAbstractionStarter]: 224 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:39:47,146 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 225 thread instances. [2021-06-10 14:39:47,314 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:39:47,314 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:39:47,314 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:39:47,314 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:39:47,314 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:39:47,314 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:39:47,315 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:39:47,315 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:39:47,315 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:39:47,315 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:39:47,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1131 places, 680 transitions, 52885 flow [2021-06-10 14:39:49,006 INFO L129 PetriNetUnfolder]: 0/1355 cut-off events. [2021-06-10 14:39:49,006 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:49,006 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27456 conditions, 1355 events. 0/1355 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5317 event pairs, 0 based on Foata normal form. 0/1129 useless extension candidates. Maximal degree in co-relation 0. Up to 226 conditions per place. [2021-06-10 14:39:49,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 1131 places, 680 transitions, 52885 flow [2021-06-10 14:39:49,023 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1129 places, 678 transitions, 52881 flow [2021-06-10 14:39:49,024 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:39:49,024 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:49,024 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:49,024 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:39:49,024 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:49,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2477859, now seen corresponding path program 1 times [2021-06-10 14:39:49,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:49,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94404742] [2021-06-10 14:39:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:39:49,191 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:39:49,191 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:39:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:39:49,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94404742] [2021-06-10 14:39:49,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:39:49,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:39:49,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169560803] [2021-06-10 14:39:49,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:39:49,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:39:49,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:39:49,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:39:49,194 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 677 out of 680 [2021-06-10 14:39:49,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1129 places, 678 transitions, 52881 flow. Second operand has 3 states, 3 states have (on average 677.6666666666666) internal successors, (2033), 3 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:49,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:39:49,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 677 of 680 [2021-06-10 14:39:49,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:39:50,536 INFO L129 PetriNetUnfolder]: 0/677 cut-off events. [2021-06-10 14:39:50,536 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:50,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26780 conditions, 677 events. 0/677 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1360 event pairs, 0 based on Foata normal form. 226/903 useless extension candidates. Maximal degree in co-relation 0. Up to 226 conditions per place. [2021-06-10 14:39:50,539 INFO L132 encePairwiseOnDemand]: 678/680 looper letters, 0 selfloop transitions, 1 changer transitions 0/677 dead transitions. [2021-06-10 14:39:50,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1130 places, 677 transitions, 52881 flow [2021-06-10 14:39:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:39:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:39:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2033 transitions. [2021-06-10 14:39:50,540 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9965686274509804 [2021-06-10 14:39:50,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2033 transitions. [2021-06-10 14:39:50,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2033 transitions. [2021-06-10 14:39:50,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:39:50,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2033 transitions. [2021-06-10 14:39:50,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 677.6666666666666) internal successors, (2033), 3 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:50,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:50,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:50,542 INFO L185 Difference]: Start difference. First operand has 1129 places, 678 transitions, 52881 flow. Second operand 3 states and 2033 transitions. [2021-06-10 14:39:50,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1130 places, 677 transitions, 52881 flow [2021-06-10 14:39:55,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1130 places, 677 transitions, 2481 flow, removed 25200 selfloop flow, removed 0 redundant places. [2021-06-10 14:39:55,957 INFO L241 Difference]: Finished difference. Result has 1130 places, 677 transitions, 2481 flow [2021-06-10 14:39:55,957 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=1128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2481, PETRI_PLACES=1130, PETRI_TRANSITIONS=677} [2021-06-10 14:39:55,957 INFO L343 CegarLoopForPetriNet]: 1129 programPoint places, 1 predicate places. [2021-06-10 14:39:55,957 INFO L480 AbstractCegarLoop]: Abstraction has has 1130 places, 677 transitions, 2481 flow [2021-06-10 14:39:55,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 677.6666666666666) internal successors, (2033), 3 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:55,958 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:55,958 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:39:55,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448 [2021-06-10 14:39:55,958 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:55,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:55,958 INFO L82 PathProgramCache]: Analyzing trace with hash -842741207, now seen corresponding path program 1 times [2021-06-10 14:39:55,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:55,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619911791] [2021-06-10 14:39:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:56,116 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:39:56,119 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:39:56,230 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:39:56,231 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:39:56,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449 [2021-06-10 14:39:56,231 WARN L342 ceAbstractionStarter]: 225 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:39:56,231 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 226 thread instances. [2021-06-10 14:39:56,398 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:39:56,399 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:39:56,399 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:39:56,399 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:39:56,399 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:39:56,399 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:39:56,399 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:39:56,399 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:39:56,399 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:39:56,399 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:39:56,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1136 places, 683 transitions, 53346 flow [2021-06-10 14:39:58,323 INFO L129 PetriNetUnfolder]: 0/1361 cut-off events. [2021-06-10 14:39:58,323 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:58,323 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27691 conditions, 1361 events. 0/1361 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5262 event pairs, 0 based on Foata normal form. 0/1134 useless extension candidates. Maximal degree in co-relation 0. Up to 227 conditions per place. [2021-06-10 14:39:58,323 INFO L82 GeneralOperation]: Start removeDead. Operand has 1136 places, 683 transitions, 53346 flow [2021-06-10 14:39:58,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1134 places, 681 transitions, 53342 flow [2021-06-10 14:39:58,357 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:39:58,357 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:39:58,357 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:39:58,357 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:39:58,357 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:39:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:39:58,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2499715, now seen corresponding path program 1 times [2021-06-10 14:39:58,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:39:58,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836045196] [2021-06-10 14:39:58,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:39:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:39:58,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:39:58,538 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:39:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:39:58,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836045196] [2021-06-10 14:39:58,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:39:58,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:39:58,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725829272] [2021-06-10 14:39:58,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:39:58,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:39:58,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:39:58,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:39:58,541 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 680 out of 683 [2021-06-10 14:39:58,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1134 places, 681 transitions, 53342 flow. Second operand has 3 states, 3 states have (on average 680.6666666666666) internal successors, (2042), 3 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:39:58,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:39:58,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 680 of 683 [2021-06-10 14:39:58,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:40:00,093 INFO L129 PetriNetUnfolder]: 0/680 cut-off events. [2021-06-10 14:40:00,094 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:00,094 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27012 conditions, 680 events. 0/680 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1197 event pairs, 0 based on Foata normal form. 227/907 useless extension candidates. Maximal degree in co-relation 0. Up to 227 conditions per place. [2021-06-10 14:40:00,096 INFO L132 encePairwiseOnDemand]: 681/683 looper letters, 0 selfloop transitions, 1 changer transitions 0/680 dead transitions. [2021-06-10 14:40:00,096 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1135 places, 680 transitions, 53342 flow [2021-06-10 14:40:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:40:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:40:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2042 transitions. [2021-06-10 14:40:00,097 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9965836993655441 [2021-06-10 14:40:00,097 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2042 transitions. [2021-06-10 14:40:00,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2042 transitions. [2021-06-10 14:40:00,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:40:00,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2042 transitions. [2021-06-10 14:40:00,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 680.6666666666666) internal successors, (2042), 3 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:00,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 683.0) internal successors, (2732), 4 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:00,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 683.0) internal successors, (2732), 4 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:00,099 INFO L185 Difference]: Start difference. First operand has 1134 places, 681 transitions, 53342 flow. Second operand 3 states and 2042 transitions. [2021-06-10 14:40:00,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1135 places, 680 transitions, 53342 flow [2021-06-10 14:40:05,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1135 places, 680 transitions, 2492 flow, removed 25425 selfloop flow, removed 0 redundant places. [2021-06-10 14:40:05,059 INFO L241 Difference]: Finished difference. Result has 1135 places, 680 transitions, 2492 flow [2021-06-10 14:40:05,060 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=683, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=1133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2492, PETRI_PLACES=1135, PETRI_TRANSITIONS=680} [2021-06-10 14:40:05,060 INFO L343 CegarLoopForPetriNet]: 1134 programPoint places, 1 predicate places. [2021-06-10 14:40:05,060 INFO L480 AbstractCegarLoop]: Abstraction has has 1135 places, 680 transitions, 2492 flow [2021-06-10 14:40:05,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 680.6666666666666) internal successors, (2042), 3 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:05,060 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:40:05,060 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:40:05,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450 [2021-06-10 14:40:05,060 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:40:05,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:40:05,060 INFO L82 PathProgramCache]: Analyzing trace with hash 554770171, now seen corresponding path program 1 times [2021-06-10 14:40:05,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:40:05,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010813959] [2021-06-10 14:40:05,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:40:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:40:05,369 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:40:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:40:05,373 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:40:05,487 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:40:05,487 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:40:05,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451 [2021-06-10 14:40:05,487 WARN L342 ceAbstractionStarter]: 226 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:40:05,487 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 227 thread instances. [2021-06-10 14:40:05,654 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:40:05,655 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:40:05,655 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:40:05,655 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:40:05,655 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:40:05,655 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:40:05,655 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:40:05,655 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:40:05,655 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:40:05,655 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:40:05,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1141 places, 686 transitions, 53809 flow [2021-06-10 14:40:07,405 INFO L129 PetriNetUnfolder]: 0/1367 cut-off events. [2021-06-10 14:40:07,405 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:07,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27927 conditions, 1367 events. 0/1367 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5350 event pairs, 0 based on Foata normal form. 0/1139 useless extension candidates. Maximal degree in co-relation 0. Up to 228 conditions per place. [2021-06-10 14:40:07,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 1141 places, 686 transitions, 53809 flow [2021-06-10 14:40:07,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1139 places, 684 transitions, 53805 flow [2021-06-10 14:40:07,422 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:40:07,422 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:07,422 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:40:07,423 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:40:07,423 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:40:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:40:07,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2521667, now seen corresponding path program 1 times [2021-06-10 14:40:07,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:40:07,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192443712] [2021-06-10 14:40:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:40:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:40:07,593 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:40:07,594 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:40:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:40:07,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192443712] [2021-06-10 14:40:07,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:40:07,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:40:07,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107826146] [2021-06-10 14:40:07,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:40:07,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:40:07,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:40:07,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:40:07,597 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 683 out of 686 [2021-06-10 14:40:07,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1139 places, 684 transitions, 53805 flow. Second operand has 3 states, 3 states have (on average 683.6666666666666) internal successors, (2051), 3 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:07,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:40:07,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 683 of 686 [2021-06-10 14:40:07,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:40:09,161 INFO L129 PetriNetUnfolder]: 0/683 cut-off events. [2021-06-10 14:40:09,162 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:09,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27245 conditions, 683 events. 0/683 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1333 event pairs, 0 based on Foata normal form. 228/911 useless extension candidates. Maximal degree in co-relation 0. Up to 228 conditions per place. [2021-06-10 14:40:09,164 INFO L132 encePairwiseOnDemand]: 684/686 looper letters, 0 selfloop transitions, 1 changer transitions 0/683 dead transitions. [2021-06-10 14:40:09,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1140 places, 683 transitions, 53805 flow [2021-06-10 14:40:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:40:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:40:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2051 transitions. [2021-06-10 14:40:09,165 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9965986394557823 [2021-06-10 14:40:09,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2051 transitions. [2021-06-10 14:40:09,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2051 transitions. [2021-06-10 14:40:09,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:40:09,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2051 transitions. [2021-06-10 14:40:09,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 683.6666666666666) internal successors, (2051), 3 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:09,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:09,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:09,167 INFO L185 Difference]: Start difference. First operand has 1139 places, 684 transitions, 53805 flow. Second operand 3 states and 2051 transitions. [2021-06-10 14:40:09,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1140 places, 683 transitions, 53805 flow [2021-06-10 14:40:14,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1140 places, 683 transitions, 2503 flow, removed 25651 selfloop flow, removed 0 redundant places. [2021-06-10 14:40:14,384 INFO L241 Difference]: Finished difference. Result has 1140 places, 683 transitions, 2503 flow [2021-06-10 14:40:14,385 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=2501, PETRI_DIFFERENCE_MINUEND_PLACES=1138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2503, PETRI_PLACES=1140, PETRI_TRANSITIONS=683} [2021-06-10 14:40:14,385 INFO L343 CegarLoopForPetriNet]: 1139 programPoint places, 1 predicate places. [2021-06-10 14:40:14,385 INFO L480 AbstractCegarLoop]: Abstraction has has 1140 places, 683 transitions, 2503 flow [2021-06-10 14:40:14,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 683.6666666666666) internal successors, (2051), 3 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:14,385 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:40:14,385 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:40:14,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452 [2021-06-10 14:40:14,385 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:40:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:40:14,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1321447839, now seen corresponding path program 1 times [2021-06-10 14:40:14,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:40:14,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913708085] [2021-06-10 14:40:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:40:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:40:14,548 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:40:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:40:14,552 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:40:14,667 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:40:14,667 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:40:14,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453 [2021-06-10 14:40:14,668 WARN L342 ceAbstractionStarter]: 227 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:40:14,668 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 228 thread instances. [2021-06-10 14:40:14,839 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:40:14,840 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:40:14,840 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:40:14,840 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:40:14,840 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:40:14,840 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:40:14,840 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:40:14,840 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:40:14,840 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:40:14,840 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:40:14,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1146 places, 689 transitions, 54274 flow [2021-06-10 14:40:16,501 INFO L129 PetriNetUnfolder]: 0/1373 cut-off events. [2021-06-10 14:40:16,501 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:16,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28164 conditions, 1373 events. 0/1373 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5340 event pairs, 0 based on Foata normal form. 0/1144 useless extension candidates. Maximal degree in co-relation 0. Up to 229 conditions per place. [2021-06-10 14:40:16,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 1146 places, 689 transitions, 54274 flow [2021-06-10 14:40:16,518 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1144 places, 687 transitions, 54270 flow [2021-06-10 14:40:16,519 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:40:16,519 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:16,519 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:40:16,519 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:40:16,519 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:40:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:40:16,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2543715, now seen corresponding path program 1 times [2021-06-10 14:40:16,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:40:16,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888165882] [2021-06-10 14:40:16,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:40:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:40:16,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:40:16,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:40:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:40:16,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888165882] [2021-06-10 14:40:16,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:40:16,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:40:16,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259884469] [2021-06-10 14:40:16,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:40:16,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:40:16,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:40:16,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:40:16,799 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 686 out of 689 [2021-06-10 14:40:16,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1144 places, 687 transitions, 54270 flow. Second operand has 3 states, 3 states have (on average 686.6666666666666) internal successors, (2060), 3 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:16,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:40:16,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 686 of 689 [2021-06-10 14:40:16,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:40:18,331 INFO L129 PetriNetUnfolder]: 0/686 cut-off events. [2021-06-10 14:40:18,331 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:18,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27479 conditions, 686 events. 0/686 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1319 event pairs, 0 based on Foata normal form. 229/915 useless extension candidates. Maximal degree in co-relation 0. Up to 229 conditions per place. [2021-06-10 14:40:18,334 INFO L132 encePairwiseOnDemand]: 687/689 looper letters, 0 selfloop transitions, 1 changer transitions 0/686 dead transitions. [2021-06-10 14:40:18,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1145 places, 686 transitions, 54270 flow [2021-06-10 14:40:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:40:18,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:40:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2060 transitions. [2021-06-10 14:40:18,335 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9966134494436382 [2021-06-10 14:40:18,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2060 transitions. [2021-06-10 14:40:18,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2060 transitions. [2021-06-10 14:40:18,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:40:18,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2060 transitions. [2021-06-10 14:40:18,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 686.6666666666666) internal successors, (2060), 3 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:18,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 689.0) internal successors, (2756), 4 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:18,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 689.0) internal successors, (2756), 4 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:18,337 INFO L185 Difference]: Start difference. First operand has 1144 places, 687 transitions, 54270 flow. Second operand 3 states and 2060 transitions. [2021-06-10 14:40:18,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1145 places, 686 transitions, 54270 flow [2021-06-10 14:40:23,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1145 places, 686 transitions, 2514 flow, removed 25878 selfloop flow, removed 0 redundant places. [2021-06-10 14:40:23,411 INFO L241 Difference]: Finished difference. Result has 1145 places, 686 transitions, 2514 flow [2021-06-10 14:40:23,411 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=689, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=1143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2514, PETRI_PLACES=1145, PETRI_TRANSITIONS=686} [2021-06-10 14:40:23,411 INFO L343 CegarLoopForPetriNet]: 1144 programPoint places, 1 predicate places. [2021-06-10 14:40:23,411 INFO L480 AbstractCegarLoop]: Abstraction has has 1145 places, 686 transitions, 2514 flow [2021-06-10 14:40:23,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 686.6666666666666) internal successors, (2060), 3 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:23,411 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:40:23,411 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:40:23,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454 [2021-06-10 14:40:23,412 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:40:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:40:23,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1958303042, now seen corresponding path program 1 times [2021-06-10 14:40:23,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:40:23,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827075882] [2021-06-10 14:40:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:40:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:40:23,571 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:40:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:40:23,575 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:40:23,885 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:40:23,885 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:40:23,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable455 [2021-06-10 14:40:23,885 WARN L342 ceAbstractionStarter]: 228 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:40:23,886 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 229 thread instances. [2021-06-10 14:40:24,093 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:40:24,093 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:40:24,093 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:40:24,094 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:40:24,094 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:40:24,094 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:40:24,094 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:40:24,094 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:40:24,094 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:40:24,094 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:40:24,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1151 places, 692 transitions, 54741 flow [2021-06-10 14:40:25,940 INFO L129 PetriNetUnfolder]: 0/1379 cut-off events. [2021-06-10 14:40:25,940 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:25,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28402 conditions, 1379 events. 0/1379 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5321 event pairs, 0 based on Foata normal form. 0/1149 useless extension candidates. Maximal degree in co-relation 0. Up to 230 conditions per place. [2021-06-10 14:40:25,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 1151 places, 692 transitions, 54741 flow [2021-06-10 14:40:25,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1149 places, 690 transitions, 54737 flow [2021-06-10 14:40:25,957 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:40:25,957 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:25,957 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:40:25,957 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:40:25,957 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:40:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:40:25,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2565859, now seen corresponding path program 1 times [2021-06-10 14:40:25,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:40:25,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017072640] [2021-06-10 14:40:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:40:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:40:26,118 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:40:26,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:40:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:40:26,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017072640] [2021-06-10 14:40:26,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:40:26,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:40:26,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469927946] [2021-06-10 14:40:26,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:40:26,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:40:26,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:40:26,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:40:26,122 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 689 out of 692 [2021-06-10 14:40:26,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1149 places, 690 transitions, 54737 flow. Second operand has 3 states, 3 states have (on average 689.6666666666666) internal successors, (2069), 3 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:26,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:40:26,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 689 of 692 [2021-06-10 14:40:26,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:40:27,767 INFO L129 PetriNetUnfolder]: 0/689 cut-off events. [2021-06-10 14:40:27,768 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:27,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27714 conditions, 689 events. 0/689 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1338 event pairs, 0 based on Foata normal form. 230/919 useless extension candidates. Maximal degree in co-relation 0. Up to 230 conditions per place. [2021-06-10 14:40:27,771 INFO L132 encePairwiseOnDemand]: 690/692 looper letters, 0 selfloop transitions, 1 changer transitions 0/689 dead transitions. [2021-06-10 14:40:27,771 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1150 places, 689 transitions, 54737 flow [2021-06-10 14:40:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:40:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:40:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2069 transitions. [2021-06-10 14:40:27,772 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9966281310211946 [2021-06-10 14:40:27,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2069 transitions. [2021-06-10 14:40:27,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2069 transitions. [2021-06-10 14:40:27,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:40:27,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2069 transitions. [2021-06-10 14:40:27,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 689.6666666666666) internal successors, (2069), 3 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:27,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 692.0) internal successors, (2768), 4 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:27,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 692.0) internal successors, (2768), 4 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:27,774 INFO L185 Difference]: Start difference. First operand has 1149 places, 690 transitions, 54737 flow. Second operand 3 states and 2069 transitions. [2021-06-10 14:40:27,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1150 places, 689 transitions, 54737 flow [2021-06-10 14:40:33,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1150 places, 689 transitions, 2525 flow, removed 26106 selfloop flow, removed 0 redundant places. [2021-06-10 14:40:33,053 INFO L241 Difference]: Finished difference. Result has 1150 places, 689 transitions, 2525 flow [2021-06-10 14:40:33,053 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=1148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2525, PETRI_PLACES=1150, PETRI_TRANSITIONS=689} [2021-06-10 14:40:33,053 INFO L343 CegarLoopForPetriNet]: 1149 programPoint places, 1 predicate places. [2021-06-10 14:40:33,053 INFO L480 AbstractCegarLoop]: Abstraction has has 1150 places, 689 transitions, 2525 flow [2021-06-10 14:40:33,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 689.6666666666666) internal successors, (2069), 3 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:33,053 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:40:33,053 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:40:33,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456 [2021-06-10 14:40:33,053 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:40:33,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:40:33,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1434458907, now seen corresponding path program 1 times [2021-06-10 14:40:33,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:40:33,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043398666] [2021-06-10 14:40:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:40:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:40:33,215 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:40:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:40:33,218 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:40:33,339 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:40:33,339 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:40:33,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457 [2021-06-10 14:40:33,339 WARN L342 ceAbstractionStarter]: 229 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:40:33,339 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 230 thread instances. [2021-06-10 14:40:33,520 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:40:33,520 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:40:33,521 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:40:33,521 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:40:33,521 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:40:33,521 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:40:33,521 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:40:33,521 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:40:33,521 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:40:33,521 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:40:33,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1156 places, 695 transitions, 55210 flow [2021-06-10 14:40:35,203 INFO L129 PetriNetUnfolder]: 0/1385 cut-off events. [2021-06-10 14:40:35,203 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:35,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28641 conditions, 1385 events. 0/1385 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5526 event pairs, 0 based on Foata normal form. 0/1154 useless extension candidates. Maximal degree in co-relation 0. Up to 231 conditions per place. [2021-06-10 14:40:35,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 1156 places, 695 transitions, 55210 flow [2021-06-10 14:40:35,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1154 places, 693 transitions, 55206 flow [2021-06-10 14:40:35,220 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-06-10 14:40:35,220 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:35,220 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:40:35,220 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:40:35,221 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:40:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:40:35,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2588099, now seen corresponding path program 1 times [2021-06-10 14:40:35,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:40:35,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088114779] [2021-06-10 14:40:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:40:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:40:35,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:40:35,522 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:40:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:40:35,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088114779] [2021-06-10 14:40:35,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:40:35,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:40:35,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600194910] [2021-06-10 14:40:35,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:40:35,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:40:35,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:40:35,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:40:35,525 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 692 out of 695 [2021-06-10 14:40:35,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1154 places, 693 transitions, 55206 flow. Second operand has 3 states, 3 states have (on average 692.6666666666666) internal successors, (2078), 3 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:35,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:40:35,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 692 of 695 [2021-06-10 14:40:35,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:40:37,037 INFO L129 PetriNetUnfolder]: 0/692 cut-off events. [2021-06-10 14:40:37,037 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:37,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27950 conditions, 692 events. 0/692 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1517 event pairs, 0 based on Foata normal form. 231/923 useless extension candidates. Maximal degree in co-relation 0. Up to 231 conditions per place. [2021-06-10 14:40:37,040 INFO L132 encePairwiseOnDemand]: 693/695 looper letters, 0 selfloop transitions, 1 changer transitions 0/692 dead transitions. [2021-06-10 14:40:37,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1155 places, 692 transitions, 55206 flow [2021-06-10 14:40:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:40:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:40:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2078 transitions. [2021-06-10 14:40:37,041 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.996642685851319 [2021-06-10 14:40:37,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2078 transitions. [2021-06-10 14:40:37,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2078 transitions. [2021-06-10 14:40:37,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:40:37,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2078 transitions. [2021-06-10 14:40:37,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 692.6666666666666) internal successors, (2078), 3 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:37,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 695.0) internal successors, (2780), 4 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:37,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 695.0) internal successors, (2780), 4 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:37,043 INFO L185 Difference]: Start difference. First operand has 1154 places, 693 transitions, 55206 flow. Second operand 3 states and 2078 transitions. [2021-06-10 14:40:37,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1155 places, 692 transitions, 55206 flow [2021-06-10 14:40:42,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1155 places, 692 transitions, 2536 flow, removed 26335 selfloop flow, removed 0 redundant places. [2021-06-10 14:40:42,255 INFO L241 Difference]: Finished difference. Result has 1155 places, 692 transitions, 2536 flow [2021-06-10 14:40:42,255 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=1153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2536, PETRI_PLACES=1155, PETRI_TRANSITIONS=692} [2021-06-10 14:40:42,255 INFO L343 CegarLoopForPetriNet]: 1154 programPoint places, 1 predicate places. [2021-06-10 14:40:42,255 INFO L480 AbstractCegarLoop]: Abstraction has has 1155 places, 692 transitions, 2536 flow [2021-06-10 14:40:42,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 692.6666666666666) internal successors, (2078), 3 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:42,255 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:40:42,255 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:40:42,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458 [2021-06-10 14:40:42,255 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:40:42,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:40:42,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1859745983, now seen corresponding path program 1 times [2021-06-10 14:40:42,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:40:42,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804039911] [2021-06-10 14:40:42,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:40:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:40:42,418 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:40:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:40:42,422 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:40:42,745 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:40:42,745 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:40:42,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable459 [2021-06-10 14:40:42,746 WARN L342 ceAbstractionStarter]: 230 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 14:40:42,746 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 231 thread instances. [2021-06-10 14:40:42,915 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:40:42,916 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:40:42,916 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:40:42,916 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:40:42,916 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:40:42,916 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:40:42,916 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:40:42,916 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:40:42,916 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:40:42,916 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:40:42,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1161 places, 698 transitions, 55681 flow [2021-06-10 14:40:44,784 INFO L129 PetriNetUnfolder]: 0/1391 cut-off events. [2021-06-10 14:40:44,784 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:44,784 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28881 conditions, 1391 events. 0/1391 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5425 event pairs, 0 based on Foata normal form. 0/1159 useless extension candidates. Maximal degree in co-relation 0. Up to 232 conditions per place. [2021-06-10 14:40:44,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 1161 places, 698 transitions, 55681 flow [2021-06-10 14:40:44,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1159 places, 696 transitions, 55677 flow [2021-06-10 14:40:44,802 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-06-10 14:40:44,802 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:40:44,802 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:40:44,802 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-06-10 14:40:44,802 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:40:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:40:44,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2610435, now seen corresponding path program 1 times [2021-06-10 14:40:44,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:40:44,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491273873] [2021-06-10 14:40:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:40:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:40:44,965 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:40:44,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:40:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:40:44,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491273873] [2021-06-10 14:40:44,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:40:44,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:40:44,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569102151] [2021-06-10 14:40:44,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:40:44,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:40:44,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:40:44,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:40:44,968 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 695 out of 698 [2021-06-10 14:40:44,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1159 places, 696 transitions, 55677 flow. Second operand has 3 states, 3 states have (on average 695.6666666666666) internal successors, (2087), 3 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:40:44,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:40:44,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 695 of 698 [2021-06-10 14:40:44,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand