/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:35:20,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:35:20,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:35:20,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 14:35:20,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 14:35:20,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 14:35:20,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 14:35:20,300 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-NoLbe.epf [2021-05-03 14:35:20,337 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:35:20,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:35:20,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:35:20,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:35:20,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:35:20,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:35:20,340 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:35:20,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:35:20,340 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:35:20,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:35:20,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:35:20,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:35:20,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:35:20,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:35:20,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:35:20,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:35:20,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:35:20,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:35:20,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:35:20,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:35:20,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:35:20,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:35:20,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:35:20,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:35:20,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:35:20,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:35:20,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:35:20,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:35:20,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:35:20,343 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:35:20,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:35:20,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:35:20,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:35:20,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:35:20,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:35:20,735 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:35:20,739 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:35:20,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl [2021-05-03 14:35:20,741 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl' [2021-05-03 14:35:20,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:35:20,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:35:20,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:35:20,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:35:20,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:35:20,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:35:20" (1/1) ... [2021-05-03 14:35:20,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:35:20" (1/1) ... [2021-05-03 14:35:20,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:35:20,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:35:20,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:35:20,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:35:20,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:35:20" (1/1) ... [2021-05-03 14:35:20,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:35:20" (1/1) ... [2021-05-03 14:35:20,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:35:20" (1/1) ... [2021-05-03 14:35:20,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:35:20" (1/1) ... [2021-05-03 14:35:20,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:35:20" (1/1) ... [2021-05-03 14:35:20,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:35:20" (1/1) ... [2021-05-03 14:35:20,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:35:20" (1/1) ... [2021-05-03 14:35:20,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:35:20,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:35:20,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:35:20,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:35:20,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:35:20" (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 [2021-05-03 14:35:20,898 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:35:20,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:35:20,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:35:20,899 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:35:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:35:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:35:20,899 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:35:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:35:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:35:20,900 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 14:35:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 14:35:20,900 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 14:35:20,901 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 14:35:21,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:35:21,137 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 14:35:21,138 INFO L202 PluginConnector]: Adding new model match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:35:21 BoogieIcfgContainer [2021-05-03 14:35:21,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:35:21,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:35:21,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:35:21,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:35:21,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:35:20" (1/2) ... [2021-05-03 14:35:21,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5191261d and model type match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:35:21, skipping insertion in model container [2021-05-03 14:35:21,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:35:21" (2/2) ... [2021-05-03 14:35:21,147 INFO L111 eAbstractionObserver]: Analyzing ICFG match-subst.wvr.bpl [2021-05-03 14:35:21,154 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:35:21,155 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:35:21,160 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:35:21,161 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:35:21,250 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 14:35:21,295 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 14:35:21,332 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:35:21,332 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:35:21,332 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:35:21,332 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:35:21,332 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:35:21,333 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:35:21,333 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:35:21,333 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:35:21,360 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-05-03 14:35:21,376 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:35:21,416 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:21,417 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:21,417 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:21,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:21,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1166045766, now seen corresponding path program 1 times [2021-05-03 14:35:21,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:21,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240358028] [2021-05-03 14:35:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:22,173 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-05-03 14:35:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:22,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240358028] [2021-05-03 14:35:22,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:35:22,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:35:22,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482351960] [2021-05-03 14:35:22,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:35:22,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:22,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:35:22,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:35:22,347 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:22,594 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 14:35:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:22,606 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-05-03 14:35:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:35:22,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-05-03 14:35:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:22,617 INFO L225 Difference]: With dead ends: 98 [2021-05-03 14:35:22,617 INFO L226 Difference]: Without dead ends: 72 [2021-05-03 14:35:22,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 552.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:35:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-03 14:35:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-05-03 14:35:22,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 105 transitions. [2021-05-03 14:35:22,654 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 105 transitions. Word has length 14 [2021-05-03 14:35:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:22,654 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 105 transitions. [2021-05-03 14:35:22,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 105 transitions. [2021-05-03 14:35:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:35:22,655 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:22,655 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:22,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:35:22,656 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:22,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:22,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1802957754, now seen corresponding path program 2 times [2021-05-03 14:35:22,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:22,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154158893] [2021-05-03 14:35:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:22,896 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-05-03 14:35:23,078 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 14:35:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:23,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154158893] [2021-05-03 14:35:23,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:35:23,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:35:23,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617909254] [2021-05-03 14:35:23,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:35:23,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:23,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:35:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:35:23,145 INFO L87 Difference]: Start difference. First operand 55 states and 105 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:23,387 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 14:35:23,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:23,401 INFO L93 Difference]: Finished difference Result 93 states and 168 transitions. [2021-05-03 14:35:23,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:35:23,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-05-03 14:35:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:23,404 INFO L225 Difference]: With dead ends: 93 [2021-05-03 14:35:23,404 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 14:35:23,405 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 597.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:35:23,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 14:35:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2021-05-03 14:35:23,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 91 transitions. [2021-05-03 14:35:23,412 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 91 transitions. Word has length 14 [2021-05-03 14:35:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:23,412 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 91 transitions. [2021-05-03 14:35:23,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 91 transitions. [2021-05-03 14:35:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:35:23,413 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:23,413 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:23,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 14:35:23,414 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:23,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:23,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2138675270, now seen corresponding path program 3 times [2021-05-03 14:35:23,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:23,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023652886] [2021-05-03 14:35:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:23,601 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-05-03 14:35:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:23,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023652886] [2021-05-03 14:35:23,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:35:23,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:35:23,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592039620] [2021-05-03 14:35:23,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:35:23,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:23,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:35:23,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:35:23,770 INFO L87 Difference]: Start difference. First operand 48 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:24,014 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-03 14:35:24,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:24,025 INFO L93 Difference]: Finished difference Result 80 states and 141 transitions. [2021-05-03 14:35:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:35:24,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-05-03 14:35:24,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:24,027 INFO L225 Difference]: With dead ends: 80 [2021-05-03 14:35:24,027 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 14:35:24,027 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 477.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:35:24,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 14:35:24,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-03 14:35:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 64 transitions. [2021-05-03 14:35:24,033 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 64 transitions. Word has length 14 [2021-05-03 14:35:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:24,033 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 64 transitions. [2021-05-03 14:35:24,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 64 transitions. [2021-05-03 14:35:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:35:24,034 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:24,034 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:24,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 14:35:24,034 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:24,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:24,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1206578024, now seen corresponding path program 4 times [2021-05-03 14:35:24,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:24,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563865005] [2021-05-03 14:35:24,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:24,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563865005] [2021-05-03 14:35:24,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:35:24,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:35:24,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638719085] [2021-05-03 14:35:24,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:35:24,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:24,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:35:24,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:35:24,337 INFO L87 Difference]: Start difference. First operand 37 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:24,549 INFO L93 Difference]: Finished difference Result 56 states and 96 transitions. [2021-05-03 14:35:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:35:24,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-05-03 14:35:24,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:24,556 INFO L225 Difference]: With dead ends: 56 [2021-05-03 14:35:24,556 INFO L226 Difference]: Without dead ends: 33 [2021-05-03 14:35:24,558 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:35:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-03 14:35:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-03 14:35:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:24,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-05-03 14:35:24,566 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 14 [2021-05-03 14:35:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:24,566 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-05-03 14:35:24,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-05-03 14:35:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:35:24,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:24,567 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:24,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 14:35:24,567 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:24,568 INFO L82 PathProgramCache]: Analyzing trace with hash 531109224, now seen corresponding path program 5 times [2021-05-03 14:35:24,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:24,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951286244] [2021-05-03 14:35:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:24,812 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 76 [2021-05-03 14:35:24,982 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 38 [2021-05-03 14:35:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:25,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951286244] [2021-05-03 14:35:25,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:35:25,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:35:25,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608091691] [2021-05-03 14:35:25,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:35:25,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:25,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:35:25,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:35:25,137 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:25,369 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-05-03 14:35:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:25,379 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2021-05-03 14:35:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:35:25,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-05-03 14:35:25,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:25,381 INFO L225 Difference]: With dead ends: 48 [2021-05-03 14:35:25,381 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 14:35:25,381 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 510.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:35:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 14:35:25,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-03 14:35:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2021-05-03 14:35:25,384 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 14 [2021-05-03 14:35:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:25,384 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2021-05-03 14:35:25,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2021-05-03 14:35:25,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:35:25,385 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:25,385 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:25,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 14:35:25,386 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:25,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:25,386 INFO L82 PathProgramCache]: Analyzing trace with hash 202726342, now seen corresponding path program 6 times [2021-05-03 14:35:25,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:25,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475870829] [2021-05-03 14:35:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:25,670 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2021-05-03 14:35:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:25,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475870829] [2021-05-03 14:35:25,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:35:25,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:35:25,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799633852] [2021-05-03 14:35:25,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:35:25,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:25,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:35:25,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:35:25,773 INFO L87 Difference]: Start difference. First operand 27 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:25,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:25,936 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-05-03 14:35:25,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:35:25,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-05-03 14:35:25,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:25,937 INFO L225 Difference]: With dead ends: 25 [2021-05-03 14:35:25,937 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 14:35:25,937 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 378.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:35:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 14:35:25,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 14:35:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 14:35:25,938 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-03 14:35:25,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:25,938 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 14:35:25,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 14:35:25,939 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 14:35:25,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 14:35:25,944 INFO L202 PluginConnector]: Adding new model match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 02:35:25 BasicIcfg [2021-05-03 14:35:25,944 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 14:35:25,946 INFO L168 Benchmark]: Toolchain (without parser) took 5164.64 ms. Allocated memory was 339.7 MB in the beginning and 408.9 MB in the end (delta: 69.2 MB). Free memory was 319.1 MB in the beginning and 333.5 MB in the end (delta: -14.5 MB). Peak memory consumption was 56.3 MB. Max. memory is 16.0 GB. [2021-05-03 14:35:25,946 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 339.7 MB. Free memory was 320.2 MB in the beginning and 320.1 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:35:25,946 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.97 ms. Allocated memory is still 339.7 MB. Free memory was 319.0 MB in the beginning and 317.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:35:25,947 INFO L168 Benchmark]: Boogie Preprocessor took 16.73 ms. Allocated memory is still 339.7 MB. Free memory was 317.5 MB in the beginning and 316.5 MB in the end (delta: 956.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:35:25,947 INFO L168 Benchmark]: RCFGBuilder took 310.37 ms. Allocated memory is still 339.7 MB. Free memory was 316.5 MB in the beginning and 306.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-03 14:35:25,948 INFO L168 Benchmark]: TraceAbstraction took 4804.36 ms. Allocated memory was 339.7 MB in the beginning and 408.9 MB in the end (delta: 69.2 MB). Free memory was 305.9 MB in the beginning and 333.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 16.0 GB. [2021-05-03 14:35:25,949 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 0.26 ms. Allocated memory is still 339.7 MB. Free memory was 320.2 MB in the beginning and 320.1 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.97 ms. Allocated memory is still 339.7 MB. Free memory was 319.0 MB in the beginning and 317.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.73 ms. Allocated memory is still 339.7 MB. Free memory was 317.5 MB in the beginning and 316.5 MB in the end (delta: 956.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 310.37 ms. Allocated memory is still 339.7 MB. Free memory was 316.5 MB in the beginning and 306.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4804.36 ms. Allocated memory was 339.7 MB in the beginning and 408.9 MB in the end (delta: 69.2 MB). Free memory was 305.9 MB in the beginning and 333.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: 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 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4610.5ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 43.5ms, AutomataDifference: 1456.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 42.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 147 SDslu, 177 SDs, 0 SdLazy, 80 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 116.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2904.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=0, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 45.2ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.4ms SsaConstructionTime, 165.1ms SatisfiabilityAnalysisTime, 2664.0ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 3316 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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...