/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-FA-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 14:04:21,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 14:04:21,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 14:04:22,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 14:04:22,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 14:04:22,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 14:04:22,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 14:04:22,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 14:04:22,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 14:04:22,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 14:04:22,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 14:04:22,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 14:04:22,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 14:04:22,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 14:04:22,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 14:04:22,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 14:04:22,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 14:04:22,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 14:04:22,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 14:04:22,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 14:04:22,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 14:04:22,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 14:04:22,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 14:04:22,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 14:04:22,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 14:04:22,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 14:04:22,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 14:04:22,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 14:04:22,090 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-FA-SemanticLbe.epf [2021-03-11 14:04:22,110 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 14:04:22,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 14:04:22,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 14:04:22,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 14:04:22,111 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 14:04:22,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 14:04:22,112 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 14:04:22,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 14:04:22,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 14:04:22,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 14:04:22,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 14:04:22,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 14:04:22,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 14:04:22,113 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 14:04:22,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 14:04:22,113 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 14:04:22,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 14:04:22,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 14:04:22,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 14:04:22,114 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 14:04:22,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 14:04:22,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 14:04:22,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 14:04:22,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 14:04:22,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 14:04:22,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 14:04:22,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 14:04:22,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 14:04:22,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 14:04:22,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 14:04:22,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 14:04:22,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 14:04:22,421 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 14:04:22,422 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 14:04:22,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl [2021-03-11 14:04:22,423 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl' [2021-03-11 14:04:22,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 14:04:22,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 14:04:22,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 14:04:22,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 14:04:22,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 14:04:22,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:04:22" (1/1) ... [2021-03-11 14:04:22,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:04:22" (1/1) ... [2021-03-11 14:04:22,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 14:04:22,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 14:04:22,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 14:04:22,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 14:04:22,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:04:22" (1/1) ... [2021-03-11 14:04:22,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:04:22" (1/1) ... [2021-03-11 14:04:22,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:04:22" (1/1) ... [2021-03-11 14:04:22,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:04:22" (1/1) ... [2021-03-11 14:04:22,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:04:22" (1/1) ... [2021-03-11 14:04:22,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:04:22" (1/1) ... [2021-03-11 14:04:22,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:04:22" (1/1) ... [2021-03-11 14:04:22,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 14:04:22,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 14:04:22,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 14:04:22,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 14:04:22,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:04:22" (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 [2021-03-11 14:04:22,746 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 14:04:22,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 14:04:22,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 14:04:22,747 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-03-11 14:04:22,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-03-11 14:04:22,748 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-03-11 14:04:22,749 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 14:04:22,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 14:04:22,865 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-03-11 14:04:22,867 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:04:22 BoogieIcfgContainer [2021-03-11 14:04:22,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 14:04:22,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 14:04:22,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 14:04:22,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 14:04:22,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:04:22" (1/2) ... [2021-03-11 14:04:22,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4942ebe8 and model type fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 02:04:22, skipping insertion in model container [2021-03-11 14:04:22,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:04:22" (2/2) ... [2021-03-11 14:04:22,875 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_local.bpl [2021-03-11 14:04:22,898 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 14:04:22,898 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 14:04:22,901 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 14:04:22,902 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 14:04:22,926 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:22,927 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:22,927 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:22,927 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:22,932 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:22,935 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 14:04:22,950 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 14:04:22,978 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:04:22,978 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:04:22,979 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:04:22,979 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:04:22,979 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:04:22,979 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:04:22,979 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:04:22,979 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:04:22,988 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:04:22,997 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 12 places, 9 transitions, 23 flow [2021-03-11 14:04:23,000 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 12 places, 9 transitions, 23 flow [2021-03-11 14:04:23,001 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 9 transitions, 23 flow [2021-03-11 14:04:23,019 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-11 14:04:23,019 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 14:04:23,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 10 events. 0/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 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. [2021-03-11 14:04:23,023 INFO L116 LiptonReduction]: Number of co-enabled transitions 20 [2021-03-11 14:04:23,204 INFO L131 LiptonReduction]: Checked pairs total: 8 [2021-03-11 14:04:23,204 INFO L133 LiptonReduction]: Total number of compositions: 4 [2021-03-11 14:04:23,210 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 9 places, 6 transitions, 17 flow [2021-03-11 14:04:23,216 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12 states, 7 states have (on average 2.142857142857143) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:23,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 7 states have (on average 2.142857142857143) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:23,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-03-11 14:04:23,233 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:04:23,233 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-03-11 14:04:23,234 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-11 14:04:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:04:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash 42154, now seen corresponding path program 1 times [2021-03-11 14:04:23,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:04:23,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677084230] [2021-03-11 14:04:23,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:04:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:04:23,314 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:04:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:04:23,320 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:04:23,334 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 14:04:23,334 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 14:04:23,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 14:04:23,335 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 14:04:23,335 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-11 14:04:23,344 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,344 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,344 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,344 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,346 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,346 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,347 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,347 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,348 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,349 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,351 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 14:04:23,351 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 14:04:23,358 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:04:23,358 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:04:23,358 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:04:23,359 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:04:23,359 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:04:23,359 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:04:23,359 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:04:23,359 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:04:23,361 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:04:23,361 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 15 transitions, 42 flow [2021-03-11 14:04:23,362 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 15 transitions, 42 flow [2021-03-11 14:04:23,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-03-11 14:04:23,371 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 14:04:23,371 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 14:04:23,371 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 4. Compared 25 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-11 14:04:23,372 INFO L116 LiptonReduction]: Number of co-enabled transitions 100 [2021-03-11 14:04:23,471 INFO L131 LiptonReduction]: Checked pairs total: 184 [2021-03-11 14:04:23,471 INFO L133 LiptonReduction]: Total number of compositions: 2 [2021-03-11 14:04:23,472 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 13 transitions, 38 flow [2021-03-11 14:04:23,478 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 88 states, 77 states have (on average 2.4805194805194803) internal successors, (191), 87 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:23,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 77 states have (on average 2.4805194805194803) internal successors, (191), 87 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:23,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-03-11 14:04:23,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:04:23,479 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-03-11 14:04:23,479 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:04:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:04:23,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1896722, now seen corresponding path program 1 times [2021-03-11 14:04:23,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:04:23,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119168401] [2021-03-11 14:04:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:04:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:04:23,485 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:04:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:04:23,488 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:04:23,489 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 14:04:23,489 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 14:04:23,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 14:04:23,490 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 14:04:23,491 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-11 14:04:23,495 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,495 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,495 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,495 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,496 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,496 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,496 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,496 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,497 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,497 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,497 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,497 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,498 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,508 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,509 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:23,510 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 14:04:23,510 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-11 14:04:23,511 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:04:23,511 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:04:23,511 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:04:23,511 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:04:23,511 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:04:23,511 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:04:23,511 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:04:23,511 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:04:23,512 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:04:23,513 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 21 transitions, 63 flow [2021-03-11 14:04:23,513 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 21 transitions, 63 flow [2021-03-11 14:04:23,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 21 transitions, 63 flow [2021-03-11 14:04:23,521 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-11 14:04:23,521 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 14:04:23,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 24 events. 0/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 60 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-11 14:04:23,522 INFO L116 LiptonReduction]: Number of co-enabled transitions 240 [2021-03-11 14:04:23,613 INFO L131 LiptonReduction]: Checked pairs total: 456 [2021-03-11 14:04:23,613 INFO L133 LiptonReduction]: Total number of compositions: 3 [2021-03-11 14:04:23,614 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 18 transitions, 57 flow [2021-03-11 14:04:23,653 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 438 states, 415 states have (on average 3.1349397590361447) internal successors, (1301), 437 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 438 states, 415 states have (on average 3.1349397590361447) internal successors, (1301), 437 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:23,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-11 14:04:23,657 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:04:23,657 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 14:04:23,658 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:04:23,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:04:23,658 INFO L82 PathProgramCache]: Analyzing trace with hash 80894512, now seen corresponding path program 1 times [2021-03-11 14:04:23,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:04:23,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071331383] [2021-03-11 14:04:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:04:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:04:23,736 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:23,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:23,759 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:23,760 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:23,773 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:04:23,774 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:04:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 14:04:23,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071331383] [2021-03-11 14:04:23,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:04:23,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 14:04:23,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737844594] [2021-03-11 14:04:23,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:04:23,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:04:23,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:04:23,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:04:23,801 INFO L87 Difference]: Start difference. First operand has 438 states, 415 states have (on average 3.1349397590361447) internal successors, (1301), 437 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:23,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:04:23,925 INFO L93 Difference]: Finished difference Result 930 states and 2476 transitions. [2021-03-11 14:04:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 14:04:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-03-11 14:04:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:04:23,961 INFO L225 Difference]: With dead ends: 930 [2021-03-11 14:04:23,961 INFO L226 Difference]: Without dead ends: 895 [2021-03-11 14:04:23,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:04:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-03-11 14:04:24,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 592. [2021-03-11 14:04:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 574 states have (on average 2.942508710801394) internal successors, (1689), 591 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1689 transitions. [2021-03-11 14:04:24,069 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1689 transitions. Word has length 5 [2021-03-11 14:04:24,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:04:24,069 INFO L480 AbstractCegarLoop]: Abstraction has 592 states and 1689 transitions. [2021-03-11 14:04:24,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:24,069 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1689 transitions. [2021-03-11 14:04:24,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-11 14:04:24,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:04:24,070 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 14:04:24,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 14:04:24,070 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:04:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:04:24,071 INFO L82 PathProgramCache]: Analyzing trace with hash 80901459, now seen corresponding path program 1 times [2021-03-11 14:04:24,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:04:24,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423589202] [2021-03-11 14:04:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:04:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:04:24,075 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:04:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:04:24,077 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:04:24,079 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 14:04:24,079 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 14:04:24,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 14:04:24,079 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 14:04:24,079 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-11 14:04:24,087 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,087 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,087 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,087 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,088 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,088 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,088 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,088 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,089 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,089 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,089 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,089 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,089 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,090 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,090 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,090 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,090 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,093 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,093 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,095 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,096 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 14:04:24,096 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-11 14:04:24,097 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:04:24,097 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:04:24,097 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:04:24,098 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:04:24,098 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:04:24,098 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:04:24,098 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:04:24,098 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:04:24,100 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:04:24,101 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 36 places, 27 transitions, 86 flow [2021-03-11 14:04:24,102 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 36 places, 27 transitions, 86 flow [2021-03-11 14:04:24,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 27 transitions, 86 flow [2021-03-11 14:04:24,111 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-11 14:04:24,111 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 14:04:24,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 31 events. 0/31 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. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-11 14:04:24,114 INFO L116 LiptonReduction]: Number of co-enabled transitions 440 [2021-03-11 14:04:24,220 INFO L131 LiptonReduction]: Checked pairs total: 894 [2021-03-11 14:04:24,221 INFO L133 LiptonReduction]: Total number of compositions: 4 [2021-03-11 14:04:24,223 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 78 flow [2021-03-11 14:04:24,325 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2188 states, 2141 states have (on average 3.8538066324147593) internal successors, (8251), 2187 states have internal predecessors, (8251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 2188 states, 2141 states have (on average 3.8538066324147593) internal successors, (8251), 2187 states have internal predecessors, (8251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-11 14:04:24,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:04:24,329 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 14:04:24,330 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:04:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:04:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash 109667652, now seen corresponding path program 1 times [2021-03-11 14:04:24,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:04:24,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290596811] [2021-03-11 14:04:24,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:04:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:04:24,370 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:24,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:24,395 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:24,395 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:24,402 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:04:24,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:04:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 14:04:24,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290596811] [2021-03-11 14:04:24,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:04:24,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 14:04:24,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369545912] [2021-03-11 14:04:24,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:04:24,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:04:24,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:04:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:04:24,413 INFO L87 Difference]: Start difference. First operand has 2188 states, 2141 states have (on average 3.8538066324147593) internal successors, (8251), 2187 states have internal predecessors, (8251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:04:24,547 INFO L93 Difference]: Finished difference Result 5586 states and 18685 transitions. [2021-03-11 14:04:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 14:04:24,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-03-11 14:04:24,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:04:24,584 INFO L225 Difference]: With dead ends: 5586 [2021-03-11 14:04:24,585 INFO L226 Difference]: Without dead ends: 5506 [2021-03-11 14:04:24,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:04:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5506 states. [2021-03-11 14:04:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5506 to 3458. [2021-03-11 14:04:24,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 3417 states have (on average 3.6195493122622184) internal successors, (12368), 3457 states have internal predecessors, (12368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 12368 transitions. [2021-03-11 14:04:24,814 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 12368 transitions. Word has length 5 [2021-03-11 14:04:24,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:04:24,814 INFO L480 AbstractCegarLoop]: Abstraction has 3458 states and 12368 transitions. [2021-03-11 14:04:24,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:24,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 12368 transitions. [2021-03-11 14:04:24,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-11 14:04:24,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:04:24,816 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 14:04:24,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 14:04:24,816 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:04:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:04:24,817 INFO L82 PathProgramCache]: Analyzing trace with hash -894746661, now seen corresponding path program 1 times [2021-03-11 14:04:24,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:04:24,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30128295] [2021-03-11 14:04:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:04:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:04:24,827 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:04:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:04:24,842 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:04:24,843 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 14:04:24,843 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 14:04:24,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 14:04:24,843 WARN L342 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 14:04:24,844 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-03-11 14:04:24,856 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,856 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,856 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,856 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,856 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,857 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,857 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,857 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,857 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,857 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,857 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,858 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,859 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,859 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,859 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,859 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,860 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,860 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,860 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,860 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,860 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,864 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,865 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,865 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,866 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:24,866 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 14:04:24,867 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-03-11 14:04:24,869 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:04:24,869 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:04:24,869 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:04:24,869 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:04:24,869 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:04:24,869 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:04:24,869 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:04:24,869 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:04:24,872 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:04:24,872 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 33 transitions, 111 flow [2021-03-11 14:04:24,872 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 33 transitions, 111 flow [2021-03-11 14:04:24,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 33 transitions, 111 flow [2021-03-11 14:04:24,883 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-11 14:04:24,883 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 14:04:24,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 116 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-11 14:04:24,885 INFO L116 LiptonReduction]: Number of co-enabled transitions 700 [2021-03-11 14:04:24,975 INFO L131 LiptonReduction]: Checked pairs total: 1462 [2021-03-11 14:04:24,975 INFO L133 LiptonReduction]: Total number of compositions: 5 [2021-03-11 14:04:24,978 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 28 transitions, 101 flow [2021-03-11 14:04:25,828 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10938 states, 10843 states have (on average 4.6113621691413815) internal successors, (50001), 10937 states have internal predecessors, (50001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand has 10938 states, 10843 states have (on average 4.6113621691413815) internal successors, (50001), 10937 states have internal predecessors, (50001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-11 14:04:25,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:04:25,855 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 14:04:25,856 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:04:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:04:25,856 INFO L82 PathProgramCache]: Analyzing trace with hash 145120927, now seen corresponding path program 1 times [2021-03-11 14:04:25,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:04:25,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077900293] [2021-03-11 14:04:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:04:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:04:25,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:25,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:25,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:25,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:25,904 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:04:25,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:04:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 14:04:25,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077900293] [2021-03-11 14:04:25,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:04:25,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 14:04:25,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068390927] [2021-03-11 14:04:25,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:04:25,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:04:25,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:04:25,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:04:25,935 INFO L87 Difference]: Start difference. First operand has 10938 states, 10843 states have (on average 4.6113621691413815) internal successors, (50001), 10937 states have internal predecessors, (50001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:04:26,525 INFO L93 Difference]: Finished difference Result 31142 states and 125716 transitions. [2021-03-11 14:04:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 14:04:26,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-03-11 14:04:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:04:26,883 INFO L225 Difference]: With dead ends: 31142 [2021-03-11 14:04:26,883 INFO L226 Difference]: Without dead ends: 30969 [2021-03-11 14:04:26,883 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:04:27,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30969 states. [2021-03-11 14:04:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30969 to 19116. [2021-03-11 14:04:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19116 states, 19028 states have (on average 4.299611099432416) internal successors, (81813), 19115 states have internal predecessors, (81813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19116 states to 19116 states and 81813 transitions. [2021-03-11 14:04:28,191 INFO L78 Accepts]: Start accepts. Automaton has 19116 states and 81813 transitions. Word has length 5 [2021-03-11 14:04:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:04:28,191 INFO L480 AbstractCegarLoop]: Abstraction has 19116 states and 81813 transitions. [2021-03-11 14:04:28,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 19116 states and 81813 transitions. [2021-03-11 14:04:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-11 14:04:28,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:04:28,192 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 14:04:28,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 14:04:28,192 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:04:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:04:28,193 INFO L82 PathProgramCache]: Analyzing trace with hash 204589902, now seen corresponding path program 1 times [2021-03-11 14:04:28,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:04:28,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967432007] [2021-03-11 14:04:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:04:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:04:28,204 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:28,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:28,209 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:28,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:28,216 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:04:28,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:04:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 14:04:28,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967432007] [2021-03-11 14:04:28,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:04:28,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 14:04:28,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574403010] [2021-03-11 14:04:28,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:04:28,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:04:28,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:04:28,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:04:28,221 INFO L87 Difference]: Start difference. First operand 19116 states and 81813 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:28,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:04:28,953 INFO L93 Difference]: Finished difference Result 41339 states and 166896 transitions. [2021-03-11 14:04:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 14:04:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-03-11 14:04:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:04:29,472 INFO L225 Difference]: With dead ends: 41339 [2021-03-11 14:04:29,472 INFO L226 Difference]: Without dead ends: 41215 [2021-03-11 14:04:29,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:04:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41215 states. [2021-03-11 14:04:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41215 to 23886. [2021-03-11 14:04:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23886 states, 23798 states have (on average 4.305866039162955) internal successors, (102471), 23885 states have internal predecessors, (102471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23886 states to 23886 states and 102471 transitions. [2021-03-11 14:04:31,043 INFO L78 Accepts]: Start accepts. Automaton has 23886 states and 102471 transitions. Word has length 6 [2021-03-11 14:04:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:04:31,045 INFO L480 AbstractCegarLoop]: Abstraction has 23886 states and 102471 transitions. [2021-03-11 14:04:31,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:31,045 INFO L276 IsEmpty]: Start isEmpty. Operand 23886 states and 102471 transitions. [2021-03-11 14:04:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-11 14:04:31,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:04:31,047 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 14:04:31,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 14:04:31,048 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:04:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:04:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash 2048008968, now seen corresponding path program 1 times [2021-03-11 14:04:31,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:04:31,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543756641] [2021-03-11 14:04:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:04:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:04:31,078 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:31,079 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:31,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:31,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:31,095 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:04:31,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:04:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 14:04:31,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543756641] [2021-03-11 14:04:31,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:04:31,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 14:04:31,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273105750] [2021-03-11 14:04:31,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:04:31,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:04:31,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:04:31,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:04:31,101 INFO L87 Difference]: Start difference. First operand 23886 states and 102471 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:04:31,440 INFO L93 Difference]: Finished difference Result 51539 states and 209028 transitions. [2021-03-11 14:04:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 14:04:31,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-03-11 14:04:31,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:04:31,664 INFO L225 Difference]: With dead ends: 51539 [2021-03-11 14:04:31,664 INFO L226 Difference]: Without dead ends: 51364 [2021-03-11 14:04:31,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:04:32,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51364 states. [2021-03-11 14:04:33,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51364 to 29525. [2021-03-11 14:04:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29525 states, 29437 states have (on average 4.30648503583925) internal successors, (126770), 29524 states have internal predecessors, (126770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29525 states to 29525 states and 126770 transitions. [2021-03-11 14:04:33,435 INFO L78 Accepts]: Start accepts. Automaton has 29525 states and 126770 transitions. Word has length 7 [2021-03-11 14:04:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:04:33,435 INFO L480 AbstractCegarLoop]: Abstraction has 29525 states and 126770 transitions. [2021-03-11 14:04:33,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 29525 states and 126770 transitions. [2021-03-11 14:04:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-11 14:04:33,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:04:33,437 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 14:04:33,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 14:04:33,437 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:04:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:04:33,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2048027829, now seen corresponding path program 1 times [2021-03-11 14:04:33,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:04:33,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521291672] [2021-03-11 14:04:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:04:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:04:33,441 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:04:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:04:33,442 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:04:33,443 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 14:04:33,444 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 14:04:33,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 14:04:33,444 WARN L342 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 14:04:33,444 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-03-11 14:04:33,449 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,449 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,449 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,449 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,450 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,450 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,450 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,450 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,450 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,450 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,450 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,450 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,451 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,451 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,451 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,451 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,451 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,451 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,451 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,452 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,452 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,452 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,452 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,452 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,452 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,453 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,454 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,454 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,455 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,456 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:04:33,456 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 14:04:33,456 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-03-11 14:04:33,457 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:04:33,457 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:04:33,457 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:04:33,457 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:04:33,457 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:04:33,457 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:04:33,457 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:04:33,457 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:04:33,458 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:04:33,458 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 39 transitions, 138 flow [2021-03-11 14:04:33,458 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 39 transitions, 138 flow [2021-03-11 14:04:33,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 39 transitions, 138 flow [2021-03-11 14:04:33,463 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2021-03-11 14:04:33,463 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 14:04:33,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 149 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-03-11 14:04:33,464 INFO L116 LiptonReduction]: Number of co-enabled transitions 1020 [2021-03-11 14:04:33,564 INFO L131 LiptonReduction]: Checked pairs total: 2242 [2021-03-11 14:04:33,564 INFO L133 LiptonReduction]: Total number of compositions: 6 [2021-03-11 14:04:33,565 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 33 transitions, 126 flow [2021-03-11 14:04:45,401 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54688 states, 54497 states have (on average 5.390223315044865) internal successors, (293751), 54687 states have internal predecessors, (293751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 54688 states, 54497 states have (on average 5.390223315044865) internal successors, (293751), 54687 states have internal predecessors, (293751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:45,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-11 14:04:45,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:04:45,478 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 14:04:45,478 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:04:45,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:04:45,479 INFO L82 PathProgramCache]: Analyzing trace with hash 187284127, now seen corresponding path program 1 times [2021-03-11 14:04:45,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:04:45,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26713541] [2021-03-11 14:04:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:04:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:04:45,498 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:45,498 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:45,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:45,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:45,509 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:04:45,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:04:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 14:04:45,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26713541] [2021-03-11 14:04:45,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:04:45,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 14:04:45,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531001183] [2021-03-11 14:04:45,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:04:45,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:04:45,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:04:45,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:04:45,582 INFO L87 Difference]: Start difference. First operand has 54688 states, 54497 states have (on average 5.390223315044865) internal successors, (293751), 54687 states have internal predecessors, (293751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:47,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:04:47,254 INFO L93 Difference]: Finished difference Result 166714 states and 789193 transitions. [2021-03-11 14:04:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 14:04:47,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-03-11 14:04:47,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:04:48,204 INFO L225 Difference]: With dead ends: 166714 [2021-03-11 14:04:48,204 INFO L226 Difference]: Without dead ends: 166352 [2021-03-11 14:04:48,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:04:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166352 states. [2021-03-11 14:04:55,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166352 to 102598. [2021-03-11 14:04:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102598 states, 102415 states have (on average 4.981535907826002) internal successors, (510184), 102597 states have internal predecessors, (510184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102598 states to 102598 states and 510184 transitions. [2021-03-11 14:04:56,523 INFO L78 Accepts]: Start accepts. Automaton has 102598 states and 510184 transitions. Word has length 5 [2021-03-11 14:04:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:04:56,523 INFO L480 AbstractCegarLoop]: Abstraction has 102598 states and 510184 transitions. [2021-03-11 14:04:56,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:56,523 INFO L276 IsEmpty]: Start isEmpty. Operand 102598 states and 510184 transitions. [2021-03-11 14:04:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-11 14:04:56,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:04:56,524 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 14:04:56,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-11 14:04:56,524 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:04:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:04:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1511038456, now seen corresponding path program 1 times [2021-03-11 14:04:56,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:04:56,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440346119] [2021-03-11 14:04:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:04:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:04:56,534 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:56,534 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:56,539 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:04:56,539 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:04:56,550 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:04:56,551 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:04:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 14:04:56,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440346119] [2021-03-11 14:04:56,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:04:56,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 14:04:56,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497379711] [2021-03-11 14:04:56,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:04:56,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:04:56,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:04:56,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:04:56,556 INFO L87 Difference]: Start difference. First operand 102598 states and 510184 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:04:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:04:58,905 INFO L93 Difference]: Finished difference Result 224363 states and 1062339 transitions. [2021-03-11 14:04:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 14:04:58,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-03-11 14:04:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:04:59,911 INFO L225 Difference]: With dead ends: 224363 [2021-03-11 14:04:59,912 INFO L226 Difference]: Without dead ends: 224098 [2021-03-11 14:04:59,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:05:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224098 states. [2021-03-11 14:05:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224098 to 129117. [2021-03-11 14:05:09,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129117 states, 128934 states have (on average 4.997409527355081) internal successors, (644336), 129116 states have internal predecessors, (644336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:05:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129117 states to 129117 states and 644336 transitions. [2021-03-11 14:05:10,548 INFO L78 Accepts]: Start accepts. Automaton has 129117 states and 644336 transitions. Word has length 6 [2021-03-11 14:05:10,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:05:10,548 INFO L480 AbstractCegarLoop]: Abstraction has 129117 states and 644336 transitions. [2021-03-11 14:05:10,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:05:10,548 INFO L276 IsEmpty]: Start isEmpty. Operand 129117 states and 644336 transitions. [2021-03-11 14:05:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-11 14:05:10,549 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:05:10,549 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 14:05:10,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-11 14:05:10,549 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:05:10,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:05:10,550 INFO L82 PathProgramCache]: Analyzing trace with hash -401922614, now seen corresponding path program 1 times [2021-03-11 14:05:10,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:05:10,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932629828] [2021-03-11 14:05:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:05:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:05:10,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:05:10,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:05:10,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:05:10,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:05:10,605 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:05:10,606 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:05:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 14:05:10,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932629828] [2021-03-11 14:05:10,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:05:10,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 14:05:10,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172361387] [2021-03-11 14:05:10,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:05:10,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:05:10,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:05:10,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:05:10,610 INFO L87 Difference]: Start difference. First operand 129117 states and 644336 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:05:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:05:13,176 INFO L93 Difference]: Finished difference Result 283525 states and 1349293 transitions. [2021-03-11 14:05:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 14:05:13,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-03-11 14:05:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:05:15,368 INFO L225 Difference]: With dead ends: 283525 [2021-03-11 14:05:15,368 INFO L226 Difference]: Without dead ends: 283139 [2021-03-11 14:05:15,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:05:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283139 states. [2021-03-11 14:05:26,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283139 to 162005. [2021-03-11 14:05:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162005 states, 161822 states have (on average 5.0088924868064915) internal successors, (810549), 162004 states have internal predecessors, (810549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:05:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162005 states to 162005 states and 810549 transitions. [2021-03-11 14:05:27,650 INFO L78 Accepts]: Start accepts. Automaton has 162005 states and 810549 transitions. Word has length 7 [2021-03-11 14:05:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:05:27,650 INFO L480 AbstractCegarLoop]: Abstraction has 162005 states and 810549 transitions. [2021-03-11 14:05:27,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:05:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 162005 states and 810549 transitions. [2021-03-11 14:05:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-11 14:05:27,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:05:27,651 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 14:05:27,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-11 14:05:27,651 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:05:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:05:27,652 INFO L82 PathProgramCache]: Analyzing trace with hash 219245635, now seen corresponding path program 1 times [2021-03-11 14:05:27,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:05:27,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994459055] [2021-03-11 14:05:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:05:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:05:27,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:05:27,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:05:27,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:05:27,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:05:27,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:05:27,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:05:27,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:05:27,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:05:27,681 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:05:27,682 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:05:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 14:05:27,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994459055] [2021-03-11 14:05:27,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:05:27,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 14:05:27,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369708360] [2021-03-11 14:05:27,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 14:05:27,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:05:27,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 14:05:27,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:05:27,688 INFO L87 Difference]: Start difference. First operand 162005 states and 810549 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:05:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:05:32,956 INFO L93 Difference]: Finished difference Result 429634 states and 2021689 transitions. [2021-03-11 14:05:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 14:05:32,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-03-11 14:05:32,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:05:35,823 INFO L225 Difference]: With dead ends: 429634 [2021-03-11 14:05:35,823 INFO L226 Difference]: Without dead ends: 429109 [2021-03-11 14:05:35,823 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 14:05:43,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429109 states. [2021-03-11 14:05:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429109 to 158782. [2021-03-11 14:05:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158782 states, 158602 states have (on average 5.011424824403223) internal successors, (794822), 158781 states have internal predecessors, (794822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:05:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158782 states to 158782 states and 794822 transitions. [2021-03-11 14:05:51,391 INFO L78 Accepts]: Start accepts. Automaton has 158782 states and 794822 transitions. Word has length 8 [2021-03-11 14:05:51,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:05:51,391 INFO L480 AbstractCegarLoop]: Abstraction has 158782 states and 794822 transitions. [2021-03-11 14:05:51,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:05:51,391 INFO L276 IsEmpty]: Start isEmpty. Operand 158782 states and 794822 transitions. [2021-03-11 14:05:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-11 14:05:51,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:05:51,392 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 14:05:51,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-11 14:05:51,392 INFO L428 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:05:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:05:51,393 INFO L82 PathProgramCache]: Analyzing trace with hash 426193764, now seen corresponding path program 1 times [2021-03-11 14:05:51,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:05:51,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123349038] [2021-03-11 14:05:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:05:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:05:51,396 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:05:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:05:51,397 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:05:51,399 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 14:05:51,399 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 14:05:51,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-11 14:05:51,399 WARN L342 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 14:05:51,399 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-03-11 14:05:51,405 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,405 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,405 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,405 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,406 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,406 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,406 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,406 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,406 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,406 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,406 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,406 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,406 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,406 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,407 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,407 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,407 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,407 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,407 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,407 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,407 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,407 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,407 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,407 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,408 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,408 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,408 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,408 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,408 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,413 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,414 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,415 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,415 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,416 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,417 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:05:51,417 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 14:05:51,417 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-03-11 14:05:51,418 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:05:51,418 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:05:51,418 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:05:51,418 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:05:51,418 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:05:51,418 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:05:51,418 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:05:51,418 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:05:51,419 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:05:51,419 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 45 transitions, 167 flow [2021-03-11 14:05:51,419 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 45 transitions, 167 flow [2021-03-11 14:05:51,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 60 places, 45 transitions, 167 flow [2021-03-11 14:05:51,425 INFO L129 PetriNetUnfolder]: 0/52 cut-off events. [2021-03-11 14:05:51,425 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 14:05:51,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 52 events. 0/52 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 176 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-03-11 14:05:51,437 INFO L116 LiptonReduction]: Number of co-enabled transitions 1400 [2021-03-11 14:05:51,561 INFO L131 LiptonReduction]: Checked pairs total: 2900 [2021-03-11 14:05:51,561 INFO L133 LiptonReduction]: Total number of compositions: 7 [2021-03-11 14:05:51,562 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 53 places, 38 transitions, 153 flow [2021-03-11 14:11:45,784 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 273438 states, 273055 states have (on average 6.180077273809306) internal successors, (1687501), 273437 states have internal predecessors, (1687501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:11:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 273438 states, 273055 states have (on average 6.180077273809306) internal successors, (1687501), 273437 states have internal predecessors, (1687501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:11:46,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-11 14:11:46,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:11:46,428 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 14:11:46,428 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:11:46,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:11:46,429 INFO L82 PathProgramCache]: Analyzing trace with hash 236082777, now seen corresponding path program 1 times [2021-03-11 14:11:46,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:11:46,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548727645] [2021-03-11 14:11:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:11:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:11:46,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:11:46,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:11:46,457 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:11:46,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:11:46,462 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:11:46,462 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:11:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 14:11:46,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548727645] [2021-03-11 14:11:46,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:11:46,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 14:11:46,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638499785] [2021-03-11 14:11:46,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:11:46,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:11:46,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:11:46,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:11:46,836 INFO L87 Difference]: Start difference. First operand has 273438 states, 273055 states have (on average 6.180077273809306) internal successors, (1687501), 273437 states have internal predecessors, (1687501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:11:56,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:11:56,855 INFO L93 Difference]: Finished difference Result 871870 states and 4737132 transitions. [2021-03-11 14:11:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 14:11:56,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-03-11 14:11:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:12:03,740 INFO L225 Difference]: With dead ends: 871870 [2021-03-11 14:12:03,740 INFO L226 Difference]: Without dead ends: 871127 [2021-03-11 14:12:03,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:13:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871127 states. [2021-03-11 14:13:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871127 to 540800. [2021-03-11 14:13:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540800 states, 540426 states have (on average 5.664733006924167) internal successors, (3061369), 540799 states have internal predecessors, (3061369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:13:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540800 states to 540800 states and 3061369 transitions. [2021-03-11 14:13:39,253 INFO L78 Accepts]: Start accepts. Automaton has 540800 states and 3061369 transitions. Word has length 5 [2021-03-11 14:13:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:13:39,253 INFO L480 AbstractCegarLoop]: Abstraction has 540800 states and 3061369 transitions. [2021-03-11 14:13:39,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:13:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 540800 states and 3061369 transitions. [2021-03-11 14:13:39,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-11 14:13:39,254 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:13:39,254 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 14:13:39,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-11 14:13:39,254 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:13:39,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:13:39,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1270391129, now seen corresponding path program 1 times [2021-03-11 14:13:39,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:13:39,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796329276] [2021-03-11 14:13:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:13:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:13:39,264 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:13:39,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:13:39,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:13:39,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:13:39,276 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:13:39,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:13:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 14:13:39,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796329276] [2021-03-11 14:13:39,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:13:39,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 14:13:39,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965666344] [2021-03-11 14:13:39,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:13:39,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:13:39,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:13:39,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:13:39,280 INFO L87 Difference]: Start difference. First operand 540800 states and 3061369 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:13:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:13:59,174 INFO L93 Difference]: Finished difference Result 1180587 states and 6409786 transitions. [2021-03-11 14:13:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 14:13:59,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-03-11 14:13:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:14:10,378 INFO L225 Difference]: With dead ends: 1180587 [2021-03-11 14:14:10,378 INFO L226 Difference]: Without dead ends: 1180037 [2021-03-11 14:14:10,379 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:15:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180037 states. Received shutdown request... [2021-03-11 14:15:55,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-11 14:15:55,592 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 14:15:55,594 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 14:15:55,594 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 02:15:55 BasicIcfg [2021-03-11 14:15:55,594 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 14:15:55,597 INFO L168 Benchmark]: Toolchain (without parser) took 692963.15 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.8 MB in the beginning and 7.5 GB in the end (delta: -7.2 GB). Peak memory consumption was 10.7 GB. Max. memory is 16.0 GB. [2021-03-11 14:15:55,597 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:15:55,598 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.15 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:55,598 INFO L168 Benchmark]: Boogie Preprocessor took 11.21 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.8 MB in the end (delta: 833.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:15:55,599 INFO L168 Benchmark]: RCFGBuilder took 194.60 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 226.2 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:55,600 INFO L168 Benchmark]: TraceAbstraction took 692723.72 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 225.8 MB in the beginning and 7.5 GB in the end (delta: -7.3 GB). Peak memory consumption was 10.7 GB. Max. memory is 16.0 GB. [2021-03-11 14:15:55,600 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.15 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.21 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.8 MB in the end (delta: 833.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 194.60 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 226.2 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 692723.72 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 225.8 MB in the beginning and 7.5 GB in the end (delta: -7.3 GB). Peak memory consumption was 10.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 204.4ms, 12 PlacesBefore, 9 PlacesAfterwards, 9 TransitionsBefore, 6 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 8 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 108.9ms, 20 PlacesBefore, 18 PlacesAfterwards, 15 TransitionsBefore, 13 TransitionsAfterwards, 100 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 184 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 126, positive: 102, positive conditional: 0, positive unconditional: 102, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 73, positive: 60, positive conditional: 0, positive unconditional: 60, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 73, positive: 60, positive conditional: 0, positive unconditional: 60, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 13, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 65, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 65, negative conditional: 0, negative unconditional: 65, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 126, positive: 42, positive conditional: 0, positive unconditional: 42, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 73, unknown conditional: 0, unknown unconditional: 73] , Statistics on independence cache: Total cache size (in pairs): 45, Positive cache size: 35, Positive conditional cache size: 0, Positive unconditional cache size: 35, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 100.1ms, 28 PlacesBefore, 25 PlacesAfterwards, 21 TransitionsBefore, 18 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 456 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 117, positive: 82, positive conditional: 0, positive unconditional: 82, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 83, positive: 65, positive conditional: 0, positive unconditional: 65, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 83, positive: 65, positive conditional: 0, positive unconditional: 65, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 18, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 68, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 68, negative conditional: 0, negative unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 117, positive: 17, positive conditional: 0, positive unconditional: 17, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 83, unknown conditional: 0, unknown unconditional: 83] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 17, Positive conditional cache size: 0, Positive unconditional cache size: 17, Negative cache size: 14, Negative conditional cache size: 0, Negative unconditional cache size: 14 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 119.3ms, 36 PlacesBefore, 32 PlacesAfterwards, 27 TransitionsBefore, 23 TransitionsAfterwards, 440 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 894 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 167, positive: 119, positive conditional: 0, positive unconditional: 119, negative: 48, negative conditional: 0, negative unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 122, positive: 98, positive conditional: 0, positive unconditional: 98, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 122, positive: 98, positive conditional: 0, positive unconditional: 98, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 24, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 71, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 71, negative conditional: 0, negative unconditional: 71, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 167, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 122, unknown conditional: 0, unknown unconditional: 122] , Statistics on independence cache: Total cache size (in pairs): 30, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 103.4ms, 44 PlacesBefore, 39 PlacesAfterwards, 33 TransitionsBefore, 28 TransitionsAfterwards, 700 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 5 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 1462 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 214, positive: 153, positive conditional: 0, positive unconditional: 153, negative: 61, negative conditional: 0, negative unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 171, positive: 140, positive conditional: 0, positive unconditional: 140, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 171, positive: 140, positive conditional: 0, positive unconditional: 140, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 31, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 59, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 59, negative conditional: 0, negative unconditional: 59, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 214, positive: 13, positive conditional: 0, positive unconditional: 13, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 171, unknown conditional: 0, unknown unconditional: 171] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 15, Positive conditional cache size: 0, Positive unconditional cache size: 15, Negative cache size: 23, Negative conditional cache size: 0, Negative unconditional cache size: 23 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 105.7ms, 52 PlacesBefore, 46 PlacesAfterwards, 39 TransitionsBefore, 33 TransitionsAfterwards, 1020 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 2242 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 327, positive: 251, positive conditional: 0, positive unconditional: 251, negative: 76, negative conditional: 0, negative unconditional: 76, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 254, positive: 215, positive conditional: 0, positive unconditional: 215, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 254, positive: 215, positive conditional: 0, positive unconditional: 215, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 39, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 66, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 66, negative conditional: 0, negative unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 327, positive: 36, positive conditional: 0, positive unconditional: 36, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 254, unknown conditional: 0, unknown unconditional: 254] , Statistics on independence cache: Total cache size (in pairs): 46, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 141.5ms, 60 PlacesBefore, 53 PlacesAfterwards, 45 TransitionsBefore, 38 TransitionsAfterwards, 1400 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 7 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 7 TotalNumberOfCompositions, 2900 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 838, positive: 755, positive conditional: 0, positive unconditional: 755, negative: 83, negative conditional: 0, negative unconditional: 83, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 630, positive: 584, positive conditional: 0, positive unconditional: 584, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 630, positive: 584, positive conditional: 0, positive unconditional: 584, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 46, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 79, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 79, negative conditional: 0, negative unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 838, positive: 171, positive conditional: 0, positive unconditional: 171, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 630, unknown conditional: 0, unknown unconditional: 630] , Statistics on independence cache: Total cache size (in pairs): 312, Positive cache size: 276, Positive conditional cache size: 0, Positive unconditional cache size: 276, Negative cache size: 36, Negative conditional cache size: 0, Negative unconditional cache size: 36 - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 19). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 9 locations, 1 error locations. Started 7 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 692496.6ms, OverallIterations: 17, TraceHistogramMax: 1, EmptinessCheckTime: 762.3ms, AutomataDifference: 70462.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 368012.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 499 SDtfs, 645 SDslu, 441 SDs, 0 SdLazy, 765 SolverSat, 150 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 584.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 272.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=540800occurred in iteration=1, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 252492.5ms AutomataMinimizationTime, 11 MinimizatonAttempts, 933895 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 16.0ms SsaConstructionTime, 73.7ms SatisfiabilityAnalysisTime, 432.2ms InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 378 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 10/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown