/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/exp-term-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 05:47:15,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 05:47:15,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 05:47:15,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 05:47:15,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 05:47:15,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 05:47:15,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 05:47:15,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 05:47:15,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 05:47:15,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 05:47:15,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 05:47:15,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 05:47:15,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 05:47:15,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 05:47:15,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 05:47:15,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 05:47:15,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 05:47:15,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 05:47:15,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 05:47:15,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 05:47:15,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 05:47:15,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 05:47:15,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 05:47:15,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 05:47:15,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 05:47:15,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 05:47:15,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 05:47:15,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 05:47:15,239 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 [2021-03-11 05:47:15,261 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 05:47:15,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 05:47:15,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 05:47:15,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 05:47:15,263 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 05:47:15,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 05:47:15,264 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 05:47:15,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 05:47:15,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 05:47:15,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 05:47:15,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 05:47:15,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 05:47:15,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 05:47:15,265 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 05:47:15,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 05:47:15,265 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 05:47:15,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 05:47:15,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 05:47:15,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 05:47:15,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 05:47:15,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 05:47:15,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 05:47:15,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 05:47:15,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 05:47:15,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 05:47:15,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 05:47:15,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 05:47:15,266 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 05:47:15,266 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 05:47:15,266 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 05:47:15,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 05:47:15,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 05:47:15,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 05:47:15,491 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 05:47:15,491 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 05:47:15,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/exp-term-symm.wvr.bpl [2021-03-11 05:47:15,492 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/exp-term-symm.wvr.bpl' [2021-03-11 05:47:15,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 05:47:15,518 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 05:47:15,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 05:47:15,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 05:47:15,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 05:47:15,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:47:15" (1/1) ... [2021-03-11 05:47:15,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:47:15" (1/1) ... [2021-03-11 05:47:15,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 05:47:15,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 05:47:15,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 05:47:15,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 05:47:15,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:47:15" (1/1) ... [2021-03-11 05:47:15,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:47:15" (1/1) ... [2021-03-11 05:47:15,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:47:15" (1/1) ... [2021-03-11 05:47:15,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:47:15" (1/1) ... [2021-03-11 05:47:15,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:47:15" (1/1) ... [2021-03-11 05:47:15,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:47:15" (1/1) ... [2021-03-11 05:47:15,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:47:15" (1/1) ... [2021-03-11 05:47:15,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 05:47:15,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 05:47:15,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 05:47:15,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 05:47:15,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:47:15" (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 05:47:15,612 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 05:47:15,613 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 05:47:15,613 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 05:47:15,614 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 05:47:15,614 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 05:47:15,614 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 05:47:15,614 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 05:47:15,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 05:47:15,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 05:47:15,615 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 05:47:15,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 05:47:15,742 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 05:47:15,744 INFO L202 PluginConnector]: Adding new model exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 05:47:15 BoogieIcfgContainer [2021-03-11 05:47:15,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 05:47:15,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 05:47:15,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 05:47:15,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 05:47:15,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:47:15" (1/2) ... [2021-03-11 05:47:15,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769d8619 and model type exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 05:47:15, skipping insertion in model container [2021-03-11 05:47:15,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 05:47:15" (2/2) ... [2021-03-11 05:47:15,749 INFO L111 eAbstractionObserver]: Analyzing ICFG exp-term-symm.wvr.bpl [2021-03-11 05:47:15,754 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 05:47:15,757 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 05:47:15,757 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 05:47:15,799 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-11 05:47:15,815 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 05:47:15,828 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 05:47:15,828 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 05:47:15,828 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 05:47:15,828 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 05:47:15,828 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 05:47:15,828 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 05:47:15,828 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 05:47:15,828 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 05:47:15,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 44 flow [2021-03-11 05:47:15,845 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-11 05:47:15,845 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 05:47:15,846 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. [2021-03-11 05:47:15,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 44 flow [2021-03-11 05:47:15,848 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 10 transitions, 32 flow [2021-03-11 05:47:15,852 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-11 05:47:15,852 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 05:47:15,852 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:47:15,852 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:47:15,852 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:47:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:47:15,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1429089767, now seen corresponding path program 1 times [2021-03-11 05:47:15,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:47:15,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056550607] [2021-03-11 05:47:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:47:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:47:16,039 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:47:16,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:47:16,065 INFO L142 QuantifierPusher]: treesize reduction 107, result has 52.9 percent of original size [2021-03-11 05:47:16,078 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-03-11 05:47:16,306 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-11 05:47:16,310 INFO L142 QuantifierPusher]: treesize reduction 64, result has 43.4 percent of original size [2021-03-11 05:47:16,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-03-11 05:47:16,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:47:16,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:47:16,332 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 05:47:16,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056550607] [2021-03-11 05:47:16,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:47:16,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 05:47:16,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234248977] [2021-03-11 05:47:16,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 05:47:16,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:47:16,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 05:47:16,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 05:47:16,347 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 14 [2021-03-11 05:47:16,349 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) [2021-03-11 05:47:16,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:47:16,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 14 [2021-03-11 05:47:16,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:47:16,413 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 05:47:16,413 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-11 05:47:16,413 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 25 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. [2021-03-11 05:47:16,414 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 2 selfloop transitions, 1 changer transitions 1/11 dead transitions. [2021-03-11 05:47:16,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 11 transitions, 42 flow [2021-03-11 05:47:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 05:47:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 05:47:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2021-03-11 05:47:16,421 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8035714285714286 [2021-03-11 05:47:16,421 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2021-03-11 05:47:16,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2021-03-11 05:47:16,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:47:16,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2021-03-11 05:47:16,424 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) [2021-03-11 05:47:16,426 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) [2021-03-11 05:47:16,426 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) [2021-03-11 05:47:16,427 INFO L185 Difference]: Start difference. First operand has 17 places, 10 transitions, 32 flow. Second operand 4 states and 45 transitions. [2021-03-11 05:47:16,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 11 transitions, 42 flow [2021-03-11 05:47:16,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 11 transitions, 34 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-11 05:47:16,430 INFO L241 Difference]: Finished difference. Result has 18 places, 10 transitions, 31 flow [2021-03-11 05:47:16,431 INFO L318 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} [2021-03-11 05:47:16,432 INFO L335 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2021-03-11 05:47:16,432 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 10 transitions, 31 flow [2021-03-11 05:47:16,432 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) [2021-03-11 05:47:16,432 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:47:16,432 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:47:16,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 05:47:16,432 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:47:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:47:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash -411680861, now seen corresponding path program 2 times [2021-03-11 05:47:16,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:47:16,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404537942] [2021-03-11 05:47:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:47:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:47:16,475 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:47:16,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:47:16,486 INFO L142 QuantifierPusher]: treesize reduction 108, result has 52.6 percent of original size [2021-03-11 05:47:16,491 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-03-11 05:47:16,600 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-11 05:47:16,614 INFO L142 QuantifierPusher]: treesize reduction 62, result has 44.6 percent of original size [2021-03-11 05:47:16,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-03-11 05:47:16,641 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:47:16,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:47:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 05:47:16,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404537942] [2021-03-11 05:47:16,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:47:16,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 05:47:16,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822857631] [2021-03-11 05:47:16,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 05:47:16,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:47:16,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 05:47:16,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 05:47:16,651 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 14 [2021-03-11 05:47:16,652 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) [2021-03-11 05:47:16,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:47:16,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 14 [2021-03-11 05:47:16,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:47:16,690 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 05:47:16,690 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-11 05:47:16,690 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. [2021-03-11 05:47:16,690 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2021-03-11 05:47:16,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 9 transitions, 36 flow [2021-03-11 05:47:16,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 05:47:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 05:47:16,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2021-03-11 05:47:16,692 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-03-11 05:47:16,692 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2021-03-11 05:47:16,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2021-03-11 05:47:16,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:47:16,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2021-03-11 05:47:16,694 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) [2021-03-11 05:47:16,695 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) [2021-03-11 05:47:16,695 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) [2021-03-11 05:47:16,695 INFO L185 Difference]: Start difference. First operand has 18 places, 10 transitions, 31 flow. Second operand 4 states and 44 transitions. [2021-03-11 05:47:16,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 9 transitions, 36 flow [2021-03-11 05:47:16,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 9 transitions, 34 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 05:47:16,697 INFO L241 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2021-03-11 05:47:16,698 INFO L318 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} [2021-03-11 05:47:16,699 INFO L335 CegarLoopForPetriNet]: 17 programPoint places, 0 predicate places. [2021-03-11 05:47:16,699 INFO L480 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2021-03-11 05:47:16,699 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) [2021-03-11 05:47:16,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 05:47:16,706 INFO L202 PluginConnector]: Adding new model exp-term-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 05:47:16 BasicIcfg [2021-03-11 05:47:16,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 05:47:16,707 INFO L168 Benchmark]: Toolchain (without parser) took 1190.82 ms. Allocated memory was 255.9 MB in the beginning and 350.2 MB in the end (delta: 94.4 MB). Free memory was 237.1 MB in the beginning and 329.9 MB in the end (delta: -92.7 MB). Peak memory consumption was 62.3 MB. Max. memory is 16.0 GB. [2021-03-11 05:47:16,708 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 238.2 MB in the beginning and 238.2 MB in the end (delta: 2.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 05:47:16,709 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.73 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 05:47:16,709 INFO L168 Benchmark]: Boogie Preprocessor took 8.22 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.2 MB in the end (delta: 941.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 05:47:16,710 INFO L168 Benchmark]: RCFGBuilder took 197.30 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 241.1 MB in the end (delta: -7.1 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. [2021-03-11 05:47:16,711 INFO L168 Benchmark]: TraceAbstraction took 960.40 ms. Allocated memory was 255.9 MB in the beginning and 350.2 MB in the end (delta: 94.4 MB). Free memory was 240.5 MB in the beginning and 329.9 MB in the end (delta: -89.4 MB). Peak memory consumption was 65.0 MB. Max. memory is 16.0 GB. [2021-03-11 05:47:16,715 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 238.2 MB in the beginning and 238.2 MB in the end (delta: 2.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.73 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 8.22 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.2 MB in the end (delta: 941.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 197.30 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 241.1 MB in the end (delta: -7.1 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 960.40 ms. Allocated memory was 255.9 MB in the beginning and 350.2 MB in the end (delta: 94.4 MB). Free memory was 240.5 MB in the beginning and 329.9 MB in the end (delta: -89.4 MB). Peak memory consumption was 65.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 877.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 138.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4 SDtfs, 3 SDslu, 0 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 450.8ms 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: 3.3ms SsaConstructionTime, 41.4ms SatisfiabilityAnalysisTime, 600.5ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 350 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...