/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/fork_loop_unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:13:21,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:13:21,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:13:21,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 03:13:21,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 03:13:21,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 03:13:21,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 03:13:21,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 03:13:21,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 03:13:21,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 03:13:21,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 03:13:21,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 03:13:21,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 03:13:21,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 03:13:21,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 03:13:21,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 03:13:21,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 03:13:21,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 03:13:21,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 03:13:21,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 03:13:21,271 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 [2021-06-05 03:13:21,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:13:21,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:13:21,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:13:21,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:13:21,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:13:21,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:13:21,310 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:13:21,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:13:21,310 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:13:21,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:13:21,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:13:21,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:13:21,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:13:21,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:13:21,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:13:21,311 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:13:21,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:13:21,312 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:13:21,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:13:21,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:13:21,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:13:21,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:13:21,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:13:21,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:13:21,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:13:21,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:13:21,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:13:21,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:13:21,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:13:21,313 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:13:21,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:13:21,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:13:21,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:13:21,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:13:21,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:13:21,636 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:13:21,637 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:13:21,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl [2021-06-05 03:13:21,638 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl' [2021-06-05 03:13:21,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:13:21,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:13:21,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:13:21,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:13:21,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:13:21,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:13:21" (1/1) ... [2021-06-05 03:13:21,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:13:21" (1/1) ... [2021-06-05 03:13:21,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:13:21,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:13:21,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:13:21,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:13:21,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:13:21" (1/1) ... [2021-06-05 03:13:21,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:13:21" (1/1) ... [2021-06-05 03:13:21,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:13:21" (1/1) ... [2021-06-05 03:13:21,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:13:21" (1/1) ... [2021-06-05 03:13:21,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:13:21" (1/1) ... [2021-06-05 03:13:21,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:13:21" (1/1) ... [2021-06-05 03:13:21,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:13:21" (1/1) ... [2021-06-05 03:13:21,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:13:21,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:13:21,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:13:21,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:13:21,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:13:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:13:21,790 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:13:21,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:13:21,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:13:21,791 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-06-05 03:13:21,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-06-05 03:13:21,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-06-05 03:13:21,792 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 03:13:21,924 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:13:21,924 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-05 03:13:21,926 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:13:21 BoogieIcfgContainer [2021-06-05 03:13:21,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:13:21,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:13:21,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:13:21,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:13:21,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:13:21" (1/2) ... [2021-06-05 03:13:21,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff61557 and model type fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:13:21, skipping insertion in model container [2021-06-05 03:13:21,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:13:21" (2/2) ... [2021-06-05 03:13:21,933 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe.bpl [2021-06-05 03:13:21,938 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:13:21,939 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:13:21,939 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:13:21,940 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:13:21,970 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:21,971 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:21,972 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:21,973 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:21,983 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:13:21,999 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 03:13:22,016 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:13:22,017 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:13:22,017 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:13:22,017 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:13:22,017 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:13:22,017 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:13:22,017 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:13:22,017 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:13:22,025 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 10 transitions, 25 flow [2021-06-05 03:13:22,033 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:13:22,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:22,040 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:13:22,041 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:13:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:22,045 INFO L82 PathProgramCache]: Analyzing trace with hash 43134170, now seen corresponding path program 1 times [2021-06-05 03:13:22,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:22,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958575501] [2021-06-05 03:13:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:13:22,131 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:13:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:13:22,146 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:13:22,161 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:13:22,161 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:13:22,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:13:22,162 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:13:22,162 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-05 03:13:22,172 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,172 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,173 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,173 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,173 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,174 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,174 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,174 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,183 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:13:22,183 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 03:13:22,190 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:13:22,190 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:13:22,191 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:13:22,191 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:13:22,191 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:13:22,191 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:13:22,191 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:13:22,191 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:13:22,193 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2021-06-05 03:13:22,209 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:13:22,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:22,210 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:13:22,210 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:22,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:22,211 INFO L82 PathProgramCache]: Analyzing trace with hash 57452648, now seen corresponding path program 1 times [2021-06-05 03:13:22,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:22,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199661415] [2021-06-05 03:13:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:22,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:22,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199661415] [2021-06-05 03:13:22,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199661415] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:22,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:22,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:13:22,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876234634] [2021-06-05 03:13:22,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:13:22,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:22,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:13:22,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:13:22,365 INFO L87 Difference]: Start difference. First operand has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 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 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:22,468 INFO L93 Difference]: Finished difference Result 112 states and 249 transitions. [2021-06-05 03:13:22,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:13:22,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 03:13:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:22,478 INFO L225 Difference]: With dead ends: 112 [2021-06-05 03:13:22,478 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 03:13:22,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:13:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 03:13:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-06-05 03:13:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 96 states have (on average 2.3854166666666665) internal successors, (229), 102 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 229 transitions. [2021-06-05 03:13:22,533 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 229 transitions. Word has length 5 [2021-06-05 03:13:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:22,533 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 229 transitions. [2021-06-05 03:13:22,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 229 transitions. [2021-06-05 03:13:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 03:13:22,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:22,535 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-06-05 03:13:22,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 03:13:22,535 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:22,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:22,536 INFO L82 PathProgramCache]: Analyzing trace with hash -622629923, now seen corresponding path program 1 times [2021-06-05 03:13:22,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:22,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310008434] [2021-06-05 03:13:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:13:22,549 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:13:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:13:22,560 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:13:22,562 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:13:22,562 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:13:22,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 03:13:22,563 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:13:22,564 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-05 03:13:22,568 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,568 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,568 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,568 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,569 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,569 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,569 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,569 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,570 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,570 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,570 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,570 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:22,574 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:13:22,574 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 03:13:22,575 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:13:22,576 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:13:22,576 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:13:22,576 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:13:22,576 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:13:22,576 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:13:22,576 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:13:22,576 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:13:22,577 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 61 flow [2021-06-05 03:13:22,601 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:13:22,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:22,603 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:13:22,603 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:22,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:22,604 INFO L82 PathProgramCache]: Analyzing trace with hash 76542848, now seen corresponding path program 1 times [2021-06-05 03:13:22,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:22,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485008477] [2021-06-05 03:13:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:22,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:22,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485008477] [2021-06-05 03:13:22,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485008477] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:22,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:22,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:13:22,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978159238] [2021-06-05 03:13:22,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:13:22,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:22,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:13:22,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:13:22,641 INFO L87 Difference]: Start difference. First operand has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 0 states have call successors, (0), 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 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:22,723 INFO L93 Difference]: Finished difference Result 584 states and 1771 transitions. [2021-06-05 03:13:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:13:22,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 03:13:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:22,731 INFO L225 Difference]: With dead ends: 584 [2021-06-05 03:13:22,732 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 03:13:22,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:13:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 03:13:22,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-06-05 03:13:22,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 549 states have (on average 3.1311475409836067) internal successors, (1719), 566 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1719 transitions. [2021-06-05 03:13:22,782 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1719 transitions. Word has length 5 [2021-06-05 03:13:22,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:22,783 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1719 transitions. [2021-06-05 03:13:22,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1719 transitions. [2021-06-05 03:13:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 03:13:22,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:22,784 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:22,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 03:13:22,784 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:22,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:22,785 INFO L82 PathProgramCache]: Analyzing trace with hash 542941744, now seen corresponding path program 1 times [2021-06-05 03:13:22,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:22,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79305912] [2021-06-05 03:13:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:22,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:22,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79305912] [2021-06-05 03:13:22,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79305912] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:22,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:22,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:13:22,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723421477] [2021-06-05 03:13:22,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:13:22,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:22,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:13:22,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:13:22,828 INFO L87 Difference]: Start difference. First operand 567 states and 1719 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:22,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:22,991 INFO L93 Difference]: Finished difference Result 1180 states and 3596 transitions. [2021-06-05 03:13:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:13:22,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 03:13:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:22,999 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 03:13:22,999 INFO L226 Difference]: Without dead ends: 1180 [2021-06-05 03:13:23,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:13:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-06-05 03:13:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 560. [2021-06-05 03:13:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 542 states have (on average 3.1273062730627306) internal successors, (1695), 559 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1695 transitions. [2021-06-05 03:13:23,032 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1695 transitions. Word has length 7 [2021-06-05 03:13:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:23,032 INFO L482 AbstractCegarLoop]: Abstraction has 560 states and 1695 transitions. [2021-06-05 03:13:23,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1695 transitions. [2021-06-05 03:13:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:13:23,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:23,033 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:23,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 03:13:23,034 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:23,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:23,034 INFO L82 PathProgramCache]: Analyzing trace with hash -339906921, now seen corresponding path program 1 times [2021-06-05 03:13:23,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:23,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773468998] [2021-06-05 03:13:23,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:23,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:23,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773468998] [2021-06-05 03:13:23,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773468998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:13:23,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421536098] [2021-06-05 03:13:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:13:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:13:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:13:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:23,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421536098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:13:23,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:13:23,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:13:23,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043857970] [2021-06-05 03:13:23,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:13:23,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:23,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:13:23,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:13:23,315 INFO L87 Difference]: Start difference. First operand 560 states and 1695 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:23,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:23,383 INFO L93 Difference]: Finished difference Result 636 states and 1874 transitions. [2021-06-05 03:13:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:13:23,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 03:13:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:23,390 INFO L225 Difference]: With dead ends: 636 [2021-06-05 03:13:23,391 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 03:13:23,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:13:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 03:13:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 512. [2021-06-05 03:13:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 496 states have (on average 3.1048387096774195) internal successors, (1540), 511 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1540 transitions. [2021-06-05 03:13:23,421 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1540 transitions. Word has length 8 [2021-06-05 03:13:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:23,422 INFO L482 AbstractCegarLoop]: Abstraction has 512 states and 1540 transitions. [2021-06-05 03:13:23,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1540 transitions. [2021-06-05 03:13:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:13:23,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:23,423 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:23,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 03:13:23,637 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:23,637 INFO L82 PathProgramCache]: Analyzing trace with hash -339906925, now seen corresponding path program 1 times [2021-06-05 03:13:23,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:23,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675805053] [2021-06-05 03:13:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:13:23,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:23,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675805053] [2021-06-05 03:13:23,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675805053] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:23,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:23,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:13:23,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486379405] [2021-06-05 03:13:23,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:13:23,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:23,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:13:23,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:13:23,688 INFO L87 Difference]: Start difference. First operand 512 states and 1540 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:23,833 INFO L93 Difference]: Finished difference Result 1501 states and 4509 transitions. [2021-06-05 03:13:23,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:13:23,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 03:13:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:23,842 INFO L225 Difference]: With dead ends: 1501 [2021-06-05 03:13:23,842 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 03:13:23,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:13:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 03:13:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 551. [2021-06-05 03:13:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 535 states have (on average 3.100934579439252) internal successors, (1659), 550 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1659 transitions. [2021-06-05 03:13:23,871 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1659 transitions. Word has length 8 [2021-06-05 03:13:23,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:23,871 INFO L482 AbstractCegarLoop]: Abstraction has 551 states and 1659 transitions. [2021-06-05 03:13:23,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1659 transitions. [2021-06-05 03:13:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:13:23,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:23,873 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:23,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 03:13:23,873 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:23,874 INFO L82 PathProgramCache]: Analyzing trace with hash -348844225, now seen corresponding path program 2 times [2021-06-05 03:13:23,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:23,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162793442] [2021-06-05 03:13:23,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:13:23,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:23,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162793442] [2021-06-05 03:13:23,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162793442] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:23,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:23,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:13:23,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52094688] [2021-06-05 03:13:23,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:13:23,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:23,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:13:23,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:13:23,915 INFO L87 Difference]: Start difference. First operand 551 states and 1659 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:24,074 INFO L93 Difference]: Finished difference Result 1316 states and 3968 transitions. [2021-06-05 03:13:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:13:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 03:13:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:24,082 INFO L225 Difference]: With dead ends: 1316 [2021-06-05 03:13:24,083 INFO L226 Difference]: Without dead ends: 1307 [2021-06-05 03:13:24,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:13:24,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-06-05 03:13:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 548. [2021-06-05 03:13:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 532 states have (on average 3.1090225563909772) internal successors, (1654), 547 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1654 transitions. [2021-06-05 03:13:24,105 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1654 transitions. Word has length 8 [2021-06-05 03:13:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:24,105 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1654 transitions. [2021-06-05 03:13:24,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:24,106 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1654 transitions. [2021-06-05 03:13:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:13:24,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:24,106 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:24,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 03:13:24,107 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash -348671245, now seen corresponding path program 3 times [2021-06-05 03:13:24,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:24,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655759949] [2021-06-05 03:13:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:24,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:24,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655759949] [2021-06-05 03:13:24,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655759949] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:24,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:24,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 03:13:24,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805254073] [2021-06-05 03:13:24,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:13:24,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:24,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:13:24,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:13:24,171 INFO L87 Difference]: Start difference. First operand 548 states and 1654 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:24,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:24,379 INFO L93 Difference]: Finished difference Result 1131 states and 3400 transitions. [2021-06-05 03:13:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:13:24,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 03:13:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:24,385 INFO L225 Difference]: With dead ends: 1131 [2021-06-05 03:13:24,386 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 03:13:24,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:13:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 03:13:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 467. [2021-06-05 03:13:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 452 states have (on average 3.099557522123894) internal successors, (1401), 466 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1401 transitions. [2021-06-05 03:13:24,429 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1401 transitions. Word has length 8 [2021-06-05 03:13:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:24,429 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1401 transitions. [2021-06-05 03:13:24,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1401 transitions. [2021-06-05 03:13:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 03:13:24,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:24,430 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:24,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 03:13:24,430 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:24,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:24,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2075805806, now seen corresponding path program 1 times [2021-06-05 03:13:24,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:24,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853107288] [2021-06-05 03:13:24,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:13:24,435 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:13:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:13:24,438 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:13:24,440 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:13:24,440 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:13:24,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 03:13:24,444 WARN L242 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:13:24,445 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-05 03:13:24,450 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,450 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,451 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,451 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,451 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,451 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,452 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,452 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,452 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,452 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,453 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,453 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,453 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,453 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,453 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,453 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:24,458 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:13:24,458 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 03:13:24,459 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:13:24,459 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:13:24,459 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:13:24,459 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:13:24,459 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:13:24,459 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:13:24,460 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:13:24,460 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:13:24,462 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-06-05 03:13:24,598 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2969 states, 2922 states have (on average 3.893223819301848) internal successors, (11376), 2968 states have internal predecessors, (11376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 2969 states, 2922 states have (on average 3.893223819301848) internal successors, (11376), 2968 states have internal predecessors, (11376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:13:24,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:24,609 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:13:24,609 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:24,609 INFO L82 PathProgramCache]: Analyzing trace with hash 100404189, now seen corresponding path program 1 times [2021-06-05 03:13:24,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:24,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121354240] [2021-06-05 03:13:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:24,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:24,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121354240] [2021-06-05 03:13:24,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121354240] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:24,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:24,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:13:24,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111024800] [2021-06-05 03:13:24,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:13:24,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:24,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:13:24,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:13:24,644 INFO L87 Difference]: Start difference. First operand has 2969 states, 2922 states have (on average 3.893223819301848) internal successors, (11376), 2968 states have internal predecessors, (11376), 0 states have call successors, (0), 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 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:24,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:24,739 INFO L93 Difference]: Finished difference Result 2956 states and 11330 transitions. [2021-06-05 03:13:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:13:24,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 03:13:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:24,762 INFO L225 Difference]: With dead ends: 2956 [2021-06-05 03:13:24,762 INFO L226 Difference]: Without dead ends: 2923 [2021-06-05 03:13:24,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:13:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-06-05 03:13:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2923. [2021-06-05 03:13:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2882 states have (on average 3.885496183206107) internal successors, (11198), 2922 states have internal predecessors, (11198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 11198 transitions. [2021-06-05 03:13:24,917 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 11198 transitions. Word has length 5 [2021-06-05 03:13:24,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:24,917 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 11198 transitions. [2021-06-05 03:13:24,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 11198 transitions. [2021-06-05 03:13:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 03:13:24,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:24,920 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:24,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 03:13:24,921 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:24,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:24,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1998981745, now seen corresponding path program 1 times [2021-06-05 03:13:24,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:24,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127626114] [2021-06-05 03:13:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:24,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:24,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127626114] [2021-06-05 03:13:24,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127626114] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:24,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:24,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:13:24,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190731214] [2021-06-05 03:13:24,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:13:24,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:24,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:13:24,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:13:24,973 INFO L87 Difference]: Start difference. First operand 2923 states and 11198 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:25,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:25,200 INFO L93 Difference]: Finished difference Result 6688 states and 25812 transitions. [2021-06-05 03:13:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:13:25,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 03:13:25,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:25,257 INFO L225 Difference]: With dead ends: 6688 [2021-06-05 03:13:25,257 INFO L226 Difference]: Without dead ends: 6688 [2021-06-05 03:13:25,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:13:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2021-06-05 03:13:25,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 2913. [2021-06-05 03:13:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2872 states have (on average 3.885097493036212) internal successors, (11158), 2912 states have internal predecessors, (11158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:25,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 11158 transitions. [2021-06-05 03:13:25,576 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 11158 transitions. Word has length 7 [2021-06-05 03:13:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:25,577 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 11158 transitions. [2021-06-05 03:13:25,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:25,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 11158 transitions. [2021-06-05 03:13:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:13:25,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:25,577 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:25,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 03:13:25,578 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:25,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:25,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1838888163, now seen corresponding path program 1 times [2021-06-05 03:13:25,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:25,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555250750] [2021-06-05 03:13:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:25,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:25,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555250750] [2021-06-05 03:13:25,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555250750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:13:25,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11785833] [2021-06-05 03:13:25,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:13:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:25,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:13:25,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:13:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:25,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11785833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:13:25,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:13:25,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:13:25,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541839942] [2021-06-05 03:13:25,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:13:25,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:25,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:13:25,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:13:25,740 INFO L87 Difference]: Start difference. First operand 2913 states and 11158 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:25,893 INFO L93 Difference]: Finished difference Result 3797 states and 14239 transitions. [2021-06-05 03:13:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:13:25,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 03:13:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:25,910 INFO L225 Difference]: With dead ends: 3797 [2021-06-05 03:13:25,911 INFO L226 Difference]: Without dead ends: 3793 [2021-06-05 03:13:25,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:13:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2021-06-05 03:13:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 2825. [2021-06-05 03:13:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2786 states have (on average 3.8797559224694904) internal successors, (10809), 2824 states have internal predecessors, (10809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 10809 transitions. [2021-06-05 03:13:26,054 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 10809 transitions. Word has length 8 [2021-06-05 03:13:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:26,055 INFO L482 AbstractCegarLoop]: Abstraction has 2825 states and 10809 transitions. [2021-06-05 03:13:26,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 10809 transitions. [2021-06-05 03:13:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:13:26,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:26,055 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:26,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 03:13:26,280 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:26,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:26,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1838888167, now seen corresponding path program 1 times [2021-06-05 03:13:26,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:26,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855455144] [2021-06-05 03:13:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:26,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:26,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855455144] [2021-06-05 03:13:26,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855455144] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:26,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:26,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 03:13:26,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318810904] [2021-06-05 03:13:26,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:13:26,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:26,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:13:26,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:13:26,320 INFO L87 Difference]: Start difference. First operand 2825 states and 10809 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:26,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:26,652 INFO L93 Difference]: Finished difference Result 6503 states and 24965 transitions. [2021-06-05 03:13:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:13:26,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 03:13:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:26,678 INFO L225 Difference]: With dead ends: 6503 [2021-06-05 03:13:26,679 INFO L226 Difference]: Without dead ends: 6488 [2021-06-05 03:13:26,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:13:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6488 states. [2021-06-05 03:13:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6488 to 2836. [2021-06-05 03:13:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 2797 states have (on average 3.8698605648909545) internal successors, (10824), 2835 states have internal predecessors, (10824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 10824 transitions. [2021-06-05 03:13:26,848 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 10824 transitions. Word has length 8 [2021-06-05 03:13:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:26,848 INFO L482 AbstractCegarLoop]: Abstraction has 2836 states and 10824 transitions. [2021-06-05 03:13:26,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:26,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 10824 transitions. [2021-06-05 03:13:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:13:26,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:26,849 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:26,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 03:13:26,849 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:26,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1843846927, now seen corresponding path program 2 times [2021-06-05 03:13:26,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:26,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853312097] [2021-06-05 03:13:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:13:26,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:26,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853312097] [2021-06-05 03:13:26,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853312097] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:26,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:26,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:13:26,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581554836] [2021-06-05 03:13:26,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:13:26,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:26,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:13:26,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:13:26,905 INFO L87 Difference]: Start difference. First operand 2836 states and 10824 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:27,155 INFO L93 Difference]: Finished difference Result 7897 states and 30138 transitions. [2021-06-05 03:13:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:13:27,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 03:13:27,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:27,192 INFO L225 Difference]: With dead ends: 7897 [2021-06-05 03:13:27,193 INFO L226 Difference]: Without dead ends: 7888 [2021-06-05 03:13:27,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:13:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7888 states. [2021-06-05 03:13:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7888 to 2743. [2021-06-05 03:13:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2743 states, 2705 states have (on average 3.878743068391867) internal successors, (10492), 2742 states have internal predecessors, (10492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:27,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 10492 transitions. [2021-06-05 03:13:27,409 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 10492 transitions. Word has length 8 [2021-06-05 03:13:27,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:27,409 INFO L482 AbstractCegarLoop]: Abstraction has 2743 states and 10492 transitions. [2021-06-05 03:13:27,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:27,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 10492 transitions. [2021-06-05 03:13:27,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 03:13:27,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:27,410 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:27,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 03:13:27,410 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:27,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:27,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1170789958, now seen corresponding path program 1 times [2021-06-05 03:13:27,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:27,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663786515] [2021-06-05 03:13:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:27,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:27,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663786515] [2021-06-05 03:13:27,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663786515] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:27,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:27,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 03:13:27,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650562986] [2021-06-05 03:13:27,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:13:27,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:27,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:13:27,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:13:27,456 INFO L87 Difference]: Start difference. First operand 2743 states and 10492 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:27,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:27,722 INFO L93 Difference]: Finished difference Result 6277 states and 24190 transitions. [2021-06-05 03:13:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:13:27,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-06-05 03:13:27,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:27,776 INFO L225 Difference]: With dead ends: 6277 [2021-06-05 03:13:27,777 INFO L226 Difference]: Without dead ends: 6277 [2021-06-05 03:13:27,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:13:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2021-06-05 03:13:27,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 2736. [2021-06-05 03:13:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2698 states have (on average 3.8773165307635287) internal successors, (10461), 2735 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 10461 transitions. [2021-06-05 03:13:27,917 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 10461 transitions. Word has length 9 [2021-06-05 03:13:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:27,918 INFO L482 AbstractCegarLoop]: Abstraction has 2736 states and 10461 transitions. [2021-06-05 03:13:27,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 10461 transitions. [2021-06-05 03:13:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 03:13:27,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:27,918 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:27,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 03:13:27,919 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:27,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:27,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1934750506, now seen corresponding path program 1 times [2021-06-05 03:13:27,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:27,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259886636] [2021-06-05 03:13:27,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:27,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:27,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259886636] [2021-06-05 03:13:27,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259886636] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:27,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:27,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 03:13:27,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945666791] [2021-06-05 03:13:27,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:13:27,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:27,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:13:27,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:13:27,967 INFO L87 Difference]: Start difference. First operand 2736 states and 10461 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:28,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:28,273 INFO L93 Difference]: Finished difference Result 6137 states and 23593 transitions. [2021-06-05 03:13:28,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:13:28,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-06-05 03:13:28,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:28,304 INFO L225 Difference]: With dead ends: 6137 [2021-06-05 03:13:28,304 INFO L226 Difference]: Without dead ends: 6137 [2021-06-05 03:13:28,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:13:28,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6137 states. [2021-06-05 03:13:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6137 to 2750. [2021-06-05 03:13:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2712 states have (on average 3.870206489675516) internal successors, (10496), 2749 states have internal predecessors, (10496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 10496 transitions. [2021-06-05 03:13:28,470 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 10496 transitions. Word has length 10 [2021-06-05 03:13:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:28,470 INFO L482 AbstractCegarLoop]: Abstraction has 2750 states and 10496 transitions. [2021-06-05 03:13:28,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 10496 transitions. [2021-06-05 03:13:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 03:13:28,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:28,471 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:28,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 03:13:28,471 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:28,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1884882076, now seen corresponding path program 2 times [2021-06-05 03:13:28,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:28,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311597159] [2021-06-05 03:13:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:13:28,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:28,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311597159] [2021-06-05 03:13:28,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311597159] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:28,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:28,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 03:13:28,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357656381] [2021-06-05 03:13:28,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:13:28,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:28,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:13:28,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:13:28,535 INFO L87 Difference]: Start difference. First operand 2750 states and 10496 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:28,798 INFO L93 Difference]: Finished difference Result 8764 states and 33656 transitions. [2021-06-05 03:13:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:13:28,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-06-05 03:13:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:28,833 INFO L225 Difference]: With dead ends: 8764 [2021-06-05 03:13:28,833 INFO L226 Difference]: Without dead ends: 8764 [2021-06-05 03:13:28,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:13:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2021-06-05 03:13:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 2678. [2021-06-05 03:13:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2640 states have (on average 3.8700757575757576) internal successors, (10217), 2677 states have internal predecessors, (10217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:29,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 10217 transitions. [2021-06-05 03:13:29,012 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 10217 transitions. Word has length 10 [2021-06-05 03:13:29,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:29,012 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 10217 transitions. [2021-06-05 03:13:29,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 10217 transitions. [2021-06-05 03:13:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 03:13:29,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:29,013 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:29,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 03:13:29,013 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash -152320659, now seen corresponding path program 1 times [2021-06-05 03:13:29,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:29,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304201388] [2021-06-05 03:13:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:13:29,021 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:13:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:13:29,033 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:13:29,039 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:13:29,039 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:13:29,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 03:13:29,040 WARN L242 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:13:29,040 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-05 03:13:29,046 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,047 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,047 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,047 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,047 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,047 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,047 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,047 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,048 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,048 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,048 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,048 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,048 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,051 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,052 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,052 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,052 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,052 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,052 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,052 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:13:29,056 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:13:29,057 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-05 03:13:29,060 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:13:29,060 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:13:29,060 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:13:29,060 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:13:29,060 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:13:29,060 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:13:29,060 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:13:29,060 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:13:29,063 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 30 transitions, 105 flow [2021-06-05 03:13:30,546 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 14844 states, 14749 states have (on average 4.661400772933758) internal successors, (68751), 14843 states have internal predecessors, (68751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:30,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 14844 states, 14749 states have (on average 4.661400772933758) internal successors, (68751), 14843 states have internal predecessors, (68751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:13:30,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:30,573 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:13:30,573 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:30,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:30,574 INFO L82 PathProgramCache]: Analyzing trace with hash 129037055, now seen corresponding path program 1 times [2021-06-05 03:13:30,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:30,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502663400] [2021-06-05 03:13:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:30,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:30,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502663400] [2021-06-05 03:13:30,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502663400] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:30,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:30,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:13:30,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659347030] [2021-06-05 03:13:30,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:13:30,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:30,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:13:30,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:13:30,633 INFO L87 Difference]: Start difference. First operand has 14844 states, 14749 states have (on average 4.661400772933758) internal successors, (68751), 14843 states have internal predecessors, (68751), 0 states have call successors, (0), 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 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:30,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:30,828 INFO L93 Difference]: Finished difference Result 14828 states and 68686 transitions. [2021-06-05 03:13:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:13:30,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-06-05 03:13:30,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:30,887 INFO L225 Difference]: With dead ends: 14828 [2021-06-05 03:13:30,887 INFO L226 Difference]: Without dead ends: 14763 [2021-06-05 03:13:30,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:13:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14763 states. [2021-06-05 03:13:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14763 to 14763. [2021-06-05 03:13:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14763 states, 14675 states have (on average 4.6583986371379895) internal successors, (68362), 14762 states have internal predecessors, (68362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14763 states to 14763 states and 68362 transitions. [2021-06-05 03:13:31,871 INFO L78 Accepts]: Start accepts. Automaton has 14763 states and 68362 transitions. Word has length 5 [2021-06-05 03:13:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:31,872 INFO L482 AbstractCegarLoop]: Abstraction has 14763 states and 68362 transitions. [2021-06-05 03:13:31,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 14763 states and 68362 transitions. [2021-06-05 03:13:31,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 03:13:31,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:31,873 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:31,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 03:13:31,873 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:31,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:31,874 INFO L82 PathProgramCache]: Analyzing trace with hash -549477417, now seen corresponding path program 1 times [2021-06-05 03:13:31,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:31,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653140528] [2021-06-05 03:13:31,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:31,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:31,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653140528] [2021-06-05 03:13:31,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653140528] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:31,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:31,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:13:31,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528883743] [2021-06-05 03:13:31,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:13:31,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:31,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:13:31,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:13:31,918 INFO L87 Difference]: Start difference. First operand 14763 states and 68362 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:32,452 INFO L93 Difference]: Finished difference Result 35580 states and 165794 transitions. [2021-06-05 03:13:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:13:32,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 03:13:32,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:32,883 INFO L225 Difference]: With dead ends: 35580 [2021-06-05 03:13:32,883 INFO L226 Difference]: Without dead ends: 35580 [2021-06-05 03:13:32,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:13:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35580 states. [2021-06-05 03:13:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35580 to 14750. [2021-06-05 03:13:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14750 states, 14662 states have (on average 4.658504978856909) internal successors, (68303), 14749 states have internal predecessors, (68303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14750 states to 14750 states and 68303 transitions. [2021-06-05 03:13:34,196 INFO L78 Accepts]: Start accepts. Automaton has 14750 states and 68303 transitions. Word has length 7 [2021-06-05 03:13:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:34,196 INFO L482 AbstractCegarLoop]: Abstraction has 14750 states and 68303 transitions. [2021-06-05 03:13:34,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 14750 states and 68303 transitions. [2021-06-05 03:13:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:13:34,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:34,197 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:34,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 03:13:34,197 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:34,197 INFO L82 PathProgramCache]: Analyzing trace with hash 147218695, now seen corresponding path program 1 times [2021-06-05 03:13:34,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:34,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660564641] [2021-06-05 03:13:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:34,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:34,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660564641] [2021-06-05 03:13:34,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660564641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:13:34,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436015842] [2021-06-05 03:13:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:13:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:34,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:13:34,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:13:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:34,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436015842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:13:34,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:13:34,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:13:34,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688742980] [2021-06-05 03:13:34,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:13:34,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:34,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:13:34,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:13:34,341 INFO L87 Difference]: Start difference. First operand 14750 states and 68303 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:34,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:34,722 INFO L93 Difference]: Finished difference Result 20190 states and 91829 transitions. [2021-06-05 03:13:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:13:34,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 03:13:34,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:34,801 INFO L225 Difference]: With dead ends: 20190 [2021-06-05 03:13:34,801 INFO L226 Difference]: Without dead ends: 20186 [2021-06-05 03:13:34,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:13:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20186 states. [2021-06-05 03:13:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20186 to 14610. [2021-06-05 03:13:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14610 states, 14524 states have (on average 4.657601211787386) internal successors, (67647), 14609 states have internal predecessors, (67647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14610 states to 14610 states and 67647 transitions. [2021-06-05 03:13:35,556 INFO L78 Accepts]: Start accepts. Automaton has 14610 states and 67647 transitions. Word has length 8 [2021-06-05 03:13:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:35,557 INFO L482 AbstractCegarLoop]: Abstraction has 14610 states and 67647 transitions. [2021-06-05 03:13:35,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 14610 states and 67647 transitions. [2021-06-05 03:13:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:13:35,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:35,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:35,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 03:13:35,758 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:35,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:35,758 INFO L82 PathProgramCache]: Analyzing trace with hash 147218699, now seen corresponding path program 1 times [2021-06-05 03:13:35,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:35,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723439101] [2021-06-05 03:13:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:13:35,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:35,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723439101] [2021-06-05 03:13:35,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723439101] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:35,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:35,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:13:35,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768548170] [2021-06-05 03:13:35,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:13:35,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:35,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:13:35,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:13:35,793 INFO L87 Difference]: Start difference. First operand 14610 states and 67647 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:36,380 INFO L93 Difference]: Finished difference Result 41197 states and 190392 transitions. [2021-06-05 03:13:36,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:13:36,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 03:13:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:36,617 INFO L225 Difference]: With dead ends: 41197 [2021-06-05 03:13:36,617 INFO L226 Difference]: Without dead ends: 41188 [2021-06-05 03:13:36,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:13:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41188 states. [2021-06-05 03:13:37,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41188 to 14685. [2021-06-05 03:13:37,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14685 states, 14599 states have (on average 4.655387355298308) internal successors, (67964), 14684 states have internal predecessors, (67964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14685 states to 14685 states and 67964 transitions. [2021-06-05 03:13:37,611 INFO L78 Accepts]: Start accepts. Automaton has 14685 states and 67964 transitions. Word has length 8 [2021-06-05 03:13:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:37,611 INFO L482 AbstractCegarLoop]: Abstraction has 14685 states and 67964 transitions. [2021-06-05 03:13:37,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 14685 states and 67964 transitions. [2021-06-05 03:13:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:13:37,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:37,611 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:37,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 03:13:37,611 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:37,612 INFO L82 PathProgramCache]: Analyzing trace with hash 145431239, now seen corresponding path program 2 times [2021-06-05 03:13:37,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:37,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224482067] [2021-06-05 03:13:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:13:37,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:37,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224482067] [2021-06-05 03:13:37,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224482067] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:37,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:37,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:13:37,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532890879] [2021-06-05 03:13:37,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:13:37,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:37,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:13:37,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:13:37,641 INFO L87 Difference]: Start difference. First operand 14685 states and 67964 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:38,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:38,039 INFO L93 Difference]: Finished difference Result 36030 states and 167688 transitions. [2021-06-05 03:13:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:13:38,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 03:13:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:38,174 INFO L225 Difference]: With dead ends: 36030 [2021-06-05 03:13:38,175 INFO L226 Difference]: Without dead ends: 36021 [2021-06-05 03:13:38,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:13:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36021 states. [2021-06-05 03:13:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36021 to 14682. [2021-06-05 03:13:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14682 states, 14596 states have (on average 4.656001644286106) internal successors, (67959), 14681 states have internal predecessors, (67959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14682 states to 14682 states and 67959 transitions. [2021-06-05 03:13:39,387 INFO L78 Accepts]: Start accepts. Automaton has 14682 states and 67959 transitions. Word has length 8 [2021-06-05 03:13:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:39,387 INFO L482 AbstractCegarLoop]: Abstraction has 14682 states and 67959 transitions. [2021-06-05 03:13:39,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 14682 states and 67959 transitions. [2021-06-05 03:13:39,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:13:39,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:39,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:39,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 03:13:39,388 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:39,388 INFO L82 PathProgramCache]: Analyzing trace with hash 146065499, now seen corresponding path program 3 times [2021-06-05 03:13:39,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:39,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112094560] [2021-06-05 03:13:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:39,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:39,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112094560] [2021-06-05 03:13:39,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112094560] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:39,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:39,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 03:13:39,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585492360] [2021-06-05 03:13:39,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:13:39,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:13:39,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:13:39,425 INFO L87 Difference]: Start difference. First operand 14682 states and 67959 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:39,889 INFO L93 Difference]: Finished difference Result 35343 states and 164489 transitions. [2021-06-05 03:13:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:13:39,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 03:13:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:40,008 INFO L225 Difference]: With dead ends: 35343 [2021-06-05 03:13:40,008 INFO L226 Difference]: Without dead ends: 35328 [2021-06-05 03:13:40,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:13:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35328 states. [2021-06-05 03:13:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35328 to 14479. [2021-06-05 03:13:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14479 states, 14394 states have (on average 4.657635125746839) internal successors, (67042), 14478 states have internal predecessors, (67042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14479 states to 14479 states and 67042 transitions. [2021-06-05 03:13:41,211 INFO L78 Accepts]: Start accepts. Automaton has 14479 states and 67042 transitions. Word has length 8 [2021-06-05 03:13:41,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:41,211 INFO L482 AbstractCegarLoop]: Abstraction has 14479 states and 67042 transitions. [2021-06-05 03:13:41,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:41,211 INFO L276 IsEmpty]: Start isEmpty. Operand 14479 states and 67042 transitions. [2021-06-05 03:13:41,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 03:13:41,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:41,212 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:41,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 03:13:41,212 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:41,212 INFO L82 PathProgramCache]: Analyzing trace with hash 233022064, now seen corresponding path program 1 times [2021-06-05 03:13:41,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:41,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918703527] [2021-06-05 03:13:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:41,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:41,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918703527] [2021-06-05 03:13:41,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918703527] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:41,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:41,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 03:13:41,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164690583] [2021-06-05 03:13:41,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:13:41,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:13:41,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:13:41,247 INFO L87 Difference]: Start difference. First operand 14479 states and 67042 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:41,649 INFO L93 Difference]: Finished difference Result 37319 states and 174666 transitions. [2021-06-05 03:13:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:13:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-06-05 03:13:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:41,779 INFO L225 Difference]: With dead ends: 37319 [2021-06-05 03:13:41,779 INFO L226 Difference]: Without dead ends: 37319 [2021-06-05 03:13:41,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:13:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37319 states. [2021-06-05 03:13:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37319 to 14469. [2021-06-05 03:13:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14469 states, 14384 states have (on average 4.657397107897664) internal successors, (66992), 14468 states have internal predecessors, (66992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14469 states to 14469 states and 66992 transitions. [2021-06-05 03:13:42,875 INFO L78 Accepts]: Start accepts. Automaton has 14469 states and 66992 transitions. Word has length 9 [2021-06-05 03:13:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:42,875 INFO L482 AbstractCegarLoop]: Abstraction has 14469 states and 66992 transitions. [2021-06-05 03:13:42,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 14469 states and 66992 transitions. [2021-06-05 03:13:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 03:13:42,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:42,876 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:42,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 03:13:42,876 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:42,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:42,876 INFO L82 PathProgramCache]: Analyzing trace with hash -256908636, now seen corresponding path program 1 times [2021-06-05 03:13:42,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:42,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769431423] [2021-06-05 03:13:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:13:42,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:42,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769431423] [2021-06-05 03:13:42,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769431423] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:42,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:42,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 03:13:42,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470413931] [2021-06-05 03:13:42,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:13:42,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:42,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:13:42,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:13:42,914 INFO L87 Difference]: Start difference. First operand 14469 states and 66992 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:43,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:43,592 INFO L93 Difference]: Finished difference Result 49141 states and 228612 transitions. [2021-06-05 03:13:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:13:43,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-06-05 03:13:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:43,774 INFO L225 Difference]: With dead ends: 49141 [2021-06-05 03:13:43,774 INFO L226 Difference]: Without dead ends: 49141 [2021-06-05 03:13:43,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:13:44,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49141 states. [2021-06-05 03:13:44,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49141 to 14595. [2021-06-05 03:13:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14595 states, 14510 states have (on average 4.656650585802894) internal successors, (67568), 14594 states have internal predecessors, (67568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14595 states to 14595 states and 67568 transitions. [2021-06-05 03:13:44,847 INFO L78 Accepts]: Start accepts. Automaton has 14595 states and 67568 transitions. Word has length 10 [2021-06-05 03:13:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:44,847 INFO L482 AbstractCegarLoop]: Abstraction has 14595 states and 67568 transitions. [2021-06-05 03:13:44,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 14595 states and 67568 transitions. [2021-06-05 03:13:44,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 03:13:44,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:44,848 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:44,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 03:13:44,848 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:44,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:44,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1366921296, now seen corresponding path program 2 times [2021-06-05 03:13:44,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:44,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956170343] [2021-06-05 03:13:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:13:44,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:44,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956170343] [2021-06-05 03:13:44,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956170343] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:44,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:44,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 03:13:44,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739629709] [2021-06-05 03:13:44,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:13:44,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:13:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:13:44,885 INFO L87 Difference]: Start difference. First operand 14595 states and 67568 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:45,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:45,547 INFO L93 Difference]: Finished difference Result 38423 states and 179905 transitions. [2021-06-05 03:13:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:13:45,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-06-05 03:13:45,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:45,682 INFO L225 Difference]: With dead ends: 38423 [2021-06-05 03:13:45,682 INFO L226 Difference]: Without dead ends: 38423 [2021-06-05 03:13:45,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:13:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38423 states. [2021-06-05 03:13:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38423 to 14589. [2021-06-05 03:13:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14589 states, 14504 states have (on average 4.657473800330943) internal successors, (67552), 14588 states have internal predecessors, (67552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14589 states to 14589 states and 67552 transitions. [2021-06-05 03:13:46,691 INFO L78 Accepts]: Start accepts. Automaton has 14589 states and 67552 transitions. Word has length 10 [2021-06-05 03:13:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:46,691 INFO L482 AbstractCegarLoop]: Abstraction has 14589 states and 67552 transitions. [2021-06-05 03:13:46,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 14589 states and 67552 transitions. [2021-06-05 03:13:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 03:13:46,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:46,692 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:46,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-05 03:13:46,692 INFO L430 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:46,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:46,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1366258206, now seen corresponding path program 3 times [2021-06-05 03:13:46,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:46,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877952405] [2021-06-05 03:13:46,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:13:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:13:46,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:13:46,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877952405] [2021-06-05 03:13:46,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877952405] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:13:46,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:13:46,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 03:13:46,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626862804] [2021-06-05 03:13:46,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:13:46,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:13:46,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:13:46,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:13:46,736 INFO L87 Difference]: Start difference. First operand 14589 states and 67552 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:13:47,253 INFO L93 Difference]: Finished difference Result 37171 states and 173891 transitions. [2021-06-05 03:13:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:13:47,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-06-05 03:13:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:13:47,391 INFO L225 Difference]: With dead ends: 37171 [2021-06-05 03:13:47,391 INFO L226 Difference]: Without dead ends: 37171 [2021-06-05 03:13:47,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:13:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37171 states. [2021-06-05 03:13:48,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37171 to 14365. [2021-06-05 03:13:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14365 states, 14280 states have (on average 4.655392156862745) internal successors, (66479), 14364 states have internal predecessors, (66479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14365 states to 14365 states and 66479 transitions. [2021-06-05 03:13:48,659 INFO L78 Accepts]: Start accepts. Automaton has 14365 states and 66479 transitions. Word has length 10 [2021-06-05 03:13:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:13:48,659 INFO L482 AbstractCegarLoop]: Abstraction has 14365 states and 66479 transitions. [2021-06-05 03:13:48,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:13:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 14365 states and 66479 transitions. [2021-06-05 03:13:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 03:13:48,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:13:48,660 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:13:48,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-05 03:13:48,660 INFO L430 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:13:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:13:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash 630577724, now seen corresponding path program 1 times [2021-06-05 03:13:48,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:13:48,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631328634] [2021-06-05 03:13:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:13:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:13:48,664 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:13:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:13:48,665 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:13:48,666 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:13:48,667 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:13:48,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-05 03:13:48,669 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2021-06-05 03:13:48,679 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:13:48 BasicIcfg [2021-06-05 03:13:48,679 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 03:13:48,679 INFO L168 Benchmark]: Toolchain (without parser) took 27009.71 ms. Allocated memory was 373.3 MB in the beginning and 13.2 GB in the end (delta: 12.8 GB). Free memory was 352.6 MB in the beginning and 11.4 GB in the end (delta: -11.1 GB). Peak memory consumption was 1.7 GB. Max. memory is 16.0 GB. [2021-06-05 03:13:48,679 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 373.3 MB. Free memory was 353.6 MB in the beginning and 353.5 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:13:48,679 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.67 ms. Allocated memory is still 373.3 MB. Free memory was 352.5 MB in the beginning and 351.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:13:48,680 INFO L168 Benchmark]: Boogie Preprocessor took 11.57 ms. Allocated memory is still 373.3 MB. Free memory was 351.0 MB in the beginning and 350.1 MB in the end (delta: 907.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 03:13:48,680 INFO L168 Benchmark]: RCFGBuilder took 202.00 ms. Allocated memory is still 373.3 MB. Free memory was 350.0 MB in the beginning and 341.7 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 03:13:48,680 INFO L168 Benchmark]: TraceAbstraction took 26750.60 ms. Allocated memory was 373.3 MB in the beginning and 13.2 GB in the end (delta: 12.8 GB). Free memory was 341.3 MB in the beginning and 11.4 GB in the end (delta: -11.1 GB). Peak memory consumption was 1.7 GB. Max. memory is 16.0 GB. [2021-06-05 03:13:48,680 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 0.14 ms. Allocated memory is still 373.3 MB. Free memory was 353.6 MB in the beginning and 353.5 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.67 ms. Allocated memory is still 373.3 MB. Free memory was 352.5 MB in the beginning and 351.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.57 ms. Allocated memory is still 373.3 MB. Free memory was 351.0 MB in the beginning and 350.1 MB in the end (delta: 907.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 202.00 ms. Allocated memory is still 373.3 MB. Free memory was 350.0 MB in the beginning and 341.7 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 26750.60 ms. Allocated memory was 373.3 MB in the beginning and 13.2 GB in the end (delta: 12.8 GB). Free memory was 341.3 MB in the beginning and 11.4 GB in the end (delta: -11.1 GB). Peak memory consumption was 1.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: assertion can be violated assertion can be violated We found a FailurePath: [L24] 0 x := 0; VAL [x=0] [L25] 0 i := 0; VAL [i=0, x=0] [L28] FORK 0 fork i thread(i); VAL [i=0, x=0, y=0] [L16] 1 x := x + 1; VAL [i=0, x=1, y=0] [L29] 0 i := i + 1; VAL [i=1, x=1, y=0] [L28] FORK 0 fork i thread(i); VAL [i=1, x=1, y=1] [L16] 2 x := x + 1; VAL [i=1, x=2, y=1] [L29] 0 i := i + 1; VAL [i=2, x=2, y=1] [L28] FORK 0 fork i thread(i); VAL [i=2, x=2, y=1] [L16] 3 x := x + 1; VAL [i=2, x=3, y=1] [L17] 1 assert x <= y + 2; VAL [i=2, x=3, y=1] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 16 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 147.9ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 5.9ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 0, 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, 18.7ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 373.3ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 2.0ms, AutomataDifference: 142.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8 SDtfs, 21 SDslu, 24 SDs, 0 SdLazy, 37 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43.8ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.1ms SsaConstructionTime, 16.2ms SatisfiabilityAnalysisTime, 102.5ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 14 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 26 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1864.8ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 6.1ms, AutomataDifference: 884.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 75 SDtfs, 453 SDslu, 309 SDs, 0 SdLazy, 693 SolverSat, 108 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 415.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 359.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=594occurred in iteration=0, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 202.1ms AutomataMinimizationTime, 6 MinimizatonAttempts, 3089 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.8ms SsaConstructionTime, 34.8ms SatisfiabilityAnalysisTime, 420.1ms InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 187 SizeOfPredicates, 1 NumberOfNonLiveVariables, 21 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 4/6 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 - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 31 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4580.4ms, OverallIterations: 9, TraceHistogramMax: 4, EmptinessCheckTime: 15.1ms, AutomataDifference: 2195.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 139.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 131 SDtfs, 779 SDslu, 579 SDs, 0 SdLazy, 1493 SolverSat, 202 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 859.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 538.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2969occurred in iteration=0, InterpolantAutomatonStates: 85, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1481.3ms AutomataMinimizationTime, 8 MinimizatonAttempts, 26554 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.0ms SsaConstructionTime, 29.6ms SatisfiabilityAnalysisTime, 398.6ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 262 SizeOfPredicates, 1 NumberOfNonLiveVariables, 21 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 15/17 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 - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 36 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19606.9ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 30.1ms, AutomataDifference: 6499.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1485.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 179 SDtfs, 1486 SDslu, 830 SDs, 0 SdLazy, 2241 SolverSat, 366 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1408.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 629.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14844occurred in iteration=0, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10901.2ms AutomataMinimizationTime, 10 MinimizatonAttempts, 199133 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.7ms SsaConstructionTime, 20.0ms SatisfiabilityAnalysisTime, 375.1ms InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 328 SizeOfPredicates, 1 NumberOfNonLiveVariables, 21 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 11 InterpolantComputations, 9 PerfectInterpolantSequences, 20/22 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 incorrect! Received shutdown request...