/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/time-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 16:07:12,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 16:07:12,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 16:07:12,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 16:07:12,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 16:07:12,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 16:07:12,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 16:07:12,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 16:07:12,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 16:07:12,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 16:07:12,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 16:07:12,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 16:07:12,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 16:07:12,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 16:07:12,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 16:07:12,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 16:07:12,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 16:07:12,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 16:07:12,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 16:07:12,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 16:07:12,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 16:07:12,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 16:07:12,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 16:07:12,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 16:07:12,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-10 16:07:12,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-10 16:07:12,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-10 16:07:12,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-10 16:07:12,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-10 16:07:12,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-10 16:07:12,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-10 16:07:12,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-10 16:07:12,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-10 16:07:12,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-10 16:07:12,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-10 16:07:12,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-10 16:07:12,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-10 16:07:12,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-10 16:07:12,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 16:07:12,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 16:07:12,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 16:07:12,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-10 16:07:12,661 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 16:07:12,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 16:07:12,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 16:07:12,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 16:07:12,663 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 16:07:12,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 16:07:12,663 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 16:07:12,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 16:07:12,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 16:07:12,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 16:07:12,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 16:07:12,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 16:07:12,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 16:07:12,664 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 16:07:12,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 16:07:12,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 16:07:12,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 16:07:12,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 16:07:12,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 16:07:12,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 16:07:12,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 16:07:12,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 16:07:12,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 16:07:12,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 16:07:12,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 16:07:12,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 16:07:12,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 16:07:12,665 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 16:07:12,665 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 16:07:12,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 16:07:12,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 16:07:12,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 16:07:12,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 16:07:12,945 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 16:07:12,945 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 16:07:12,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/time-symm.wvr.bpl [2021-06-10 16:07:12,947 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/time-symm.wvr.bpl' [2021-06-10 16:07:12,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 16:07:12,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 16:07:12,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 16:07:12,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 16:07:12,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 16:07:12,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:07:12" (1/1) ... [2021-06-10 16:07:13,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:07:12" (1/1) ... [2021-06-10 16:07:13,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 16:07:13,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 16:07:13,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 16:07:13,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 16:07:13,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:07:12" (1/1) ... [2021-06-10 16:07:13,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:07:12" (1/1) ... [2021-06-10 16:07:13,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:07:12" (1/1) ... [2021-06-10 16:07:13,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:07:12" (1/1) ... [2021-06-10 16:07:13,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:07:12" (1/1) ... [2021-06-10 16:07:13,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:07:12" (1/1) ... [2021-06-10 16:07:13,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:07:12" (1/1) ... [2021-06-10 16:07:13,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 16:07:13,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 16:07:13,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 16:07:13,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 16:07:13,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:07:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 16:07:13,081 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-10 16:07:13,081 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-10 16:07:13,082 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-10 16:07:13,083 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-10 16:07:13,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-10 16:07:13,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-10 16:07:13,083 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 16:07:13,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 16:07:13,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 16:07:13,084 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 16:07:13,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 16:07:13,239 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 16:07:13,240 INFO L202 PluginConnector]: Adding new model time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 04:07:13 BoogieIcfgContainer [2021-06-10 16:07:13,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 16:07:13,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 16:07:13,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 16:07:13,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 16:07:13,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:07:12" (1/2) ... [2021-06-10 16:07:13,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f5be80 and model type time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 04:07:13, skipping insertion in model container [2021-06-10 16:07:13,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 04:07:13" (2/2) ... [2021-06-10 16:07:13,245 INFO L111 eAbstractionObserver]: Analyzing ICFG time-symm.wvr.bpl [2021-06-10 16:07:13,250 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 16:07:13,253 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 16:07:13,253 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 16:07:13,285 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-10 16:07:13,298 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-10 16:07:13,318 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 16:07:13,318 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 16:07:13,319 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 16:07:13,319 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 16:07:13,319 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 16:07:13,319 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 16:07:13,319 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 16:07:13,319 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 16:07:13,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 44 flow [2021-06-10 16:07:13,344 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-06-10 16:07:13,344 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-10 16:07:13,345 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 12 events. 0/12 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 16:07:13,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 44 flow [2021-06-10 16:07:13,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 10 transitions, 32 flow [2021-06-10 16:07:13,364 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-06-10 16:07:13,364 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-10 16:07:13,365 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:07:13,365 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:07:13,366 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:07:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:07:13,371 INFO L82 PathProgramCache]: Analyzing trace with hash -242159609, now seen corresponding path program 1 times [2021-06-10 16:07:13,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:07:13,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553554400] [2021-06-10 16:07:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:07:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:07:13,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:07:13,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:07:13,569 INFO L142 QuantifierPusher]: treesize reduction 24, result has 45.5 percent of original size [2021-06-10 16:07:13,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-06-10 16:07:13,606 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:07:13,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-06-10 16:07:13,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:07:13,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:07:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:07:13,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553554400] [2021-06-10 16:07:13,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:07:13,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 16:07:13,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326745572] [2021-06-10 16:07:13,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 16:07:13,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:07:13,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 16:07:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-10 16:07:13,693 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 14 [2021-06-10 16:07:13,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 10 transitions, 32 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:07:13,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:07:13,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 14 [2021-06-10 16:07:13,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:07:13,753 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-10 16:07:13,754 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-10 16:07:13,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 16 events. 0/16 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-10 16:07:13,755 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 2 selfloop transitions, 1 changer transitions 1/11 dead transitions. [2021-06-10 16:07:13,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 11 transitions, 42 flow [2021-06-10 16:07:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 16:07:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 16:07:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2021-06-10 16:07:13,763 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8035714285714286 [2021-06-10 16:07:13,763 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2021-06-10 16:07:13,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2021-06-10 16:07:13,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:07:13,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2021-06-10 16:07:13,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:07:13,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:07:13,771 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:07:13,772 INFO L185 Difference]: Start difference. First operand has 17 places, 10 transitions, 32 flow. Second operand 4 states and 45 transitions. [2021-06-10 16:07:13,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 11 transitions, 42 flow [2021-06-10 16:07:13,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 11 transitions, 34 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-10 16:07:13,778 INFO L241 Difference]: Finished difference. Result has 18 places, 10 transitions, 31 flow [2021-06-10 16:07:13,779 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=31, PETRI_PLACES=18, PETRI_TRANSITIONS=10} [2021-06-10 16:07:13,779 INFO L343 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2021-06-10 16:07:13,780 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 10 transitions, 31 flow [2021-06-10 16:07:13,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:07:13,780 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:07:13,780 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:07:13,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 16:07:13,780 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:07:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:07:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2082930237, now seen corresponding path program 2 times [2021-06-10 16:07:13,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:07:13,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562848616] [2021-06-10 16:07:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:07:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:07:13,816 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:07:13,816 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:07:13,818 INFO L142 QuantifierPusher]: treesize reduction 26, result has 43.5 percent of original size [2021-06-10 16:07:13,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-06-10 16:07:13,831 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:07:13,833 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-06-10 16:07:13,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:07:13,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:07:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:07:13,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562848616] [2021-06-10 16:07:13,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:07:13,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 16:07:13,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528357697] [2021-06-10 16:07:13,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 16:07:13,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:07:13,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 16:07:13,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-10 16:07:13,862 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 14 [2021-06-10 16:07:13,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 10 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:07:13,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:07:13,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 14 [2021-06-10 16:07:13,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:07:13,885 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-06-10 16:07:13,885 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-06-10 16:07:13,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 11 events. 0/11 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 16:07:13,886 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2021-06-10 16:07:13,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 9 transitions, 36 flow [2021-06-10 16:07:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 16:07:13,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 16:07:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2021-06-10 16:07:13,886 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-06-10 16:07:13,886 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2021-06-10 16:07:13,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2021-06-10 16:07:13,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:07:13,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2021-06-10 16:07:13,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:07:13,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:07:13,888 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:07:13,888 INFO L185 Difference]: Start difference. First operand has 18 places, 10 transitions, 31 flow. Second operand 4 states and 44 transitions. [2021-06-10 16:07:13,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 9 transitions, 36 flow [2021-06-10 16:07:13,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 9 transitions, 34 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 16:07:13,889 INFO L241 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2021-06-10 16:07:13,889 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2021-06-10 16:07:13,889 INFO L343 CegarLoopForPetriNet]: 17 programPoint places, 0 predicate places. [2021-06-10 16:07:13,890 INFO L480 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2021-06-10 16:07:13,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:07:13,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 16:07:13,894 INFO L202 PluginConnector]: Adding new model time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 04:07:13 BasicIcfg [2021-06-10 16:07:13,899 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 16:07:13,901 INFO L168 Benchmark]: Toolchain (without parser) took 910.18 ms. Allocated memory is still 316.7 MB. Free memory was 296.1 MB in the beginning and 254.8 MB in the end (delta: 41.3 MB). Peak memory consumption was 44.4 MB. Max. memory is 16.0 GB. [2021-06-10 16:07:13,902 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.74 ms. Allocated memory is still 316.7 MB. Free memory is still 297.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 16:07:13,902 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.68 ms. Allocated memory is still 316.7 MB. Free memory was 296.1 MB in the beginning and 294.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 16:07:13,903 INFO L168 Benchmark]: Boogie Preprocessor took 10.14 ms. Allocated memory is still 316.7 MB. Free memory was 294.6 MB in the beginning and 293.7 MB in the end (delta: 826.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 16:07:13,903 INFO L168 Benchmark]: RCFGBuilder took 218.28 ms. Allocated memory is still 316.7 MB. Free memory was 293.6 MB in the beginning and 283.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-10 16:07:13,903 INFO L168 Benchmark]: TraceAbstraction took 657.70 ms. Allocated memory is still 316.7 MB. Free memory was 282.7 MB in the beginning and 254.8 MB in the end (delta: 27.9 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.0 GB. [2021-06-10 16:07:13,905 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 0.74 ms. Allocated memory is still 316.7 MB. Free memory is still 297.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.68 ms. Allocated memory is still 316.7 MB. Free memory was 296.1 MB in the beginning and 294.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.14 ms. Allocated memory is still 316.7 MB. Free memory was 294.6 MB in the beginning and 293.7 MB in the end (delta: 826.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 218.28 ms. Allocated memory is still 316.7 MB. Free memory was 293.6 MB in the beginning and 283.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 657.70 ms. Allocated memory is still 316.7 MB. Free memory was 282.7 MB in the beginning and 254.8 MB in the end (delta: 27.9 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 15.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 575.6ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 118.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4 SDtfs, 3 SDslu, 0 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 166.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.5ms SsaConstructionTime, 45.1ms SatisfiabilityAnalysisTime, 284.6ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 262 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...