/usr/bin/java -Xmx8000000000 -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 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 18:38:42,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 18:38:42,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 18:38:42,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-12 18:38:42,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-12 18:38:42,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-12 18:38:42,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-12 18:38:42,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-12 18:38:42,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-12 18:38:42,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-12 18:38:42,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-12 18:38:42,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-12 18:38:42,656 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 [2021-08-12 18:38:42,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 18:38:42,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 18:38:42,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 18:38:42,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 18:38:42,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 18:38:42,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 18:38:42,696 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 18:38:42,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 18:38:42,697 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 18:38:42,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 18:38:42,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 18:38:42,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 18:38:42,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 18:38:42,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 18:38:42,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 18:38:42,699 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 18:38:42,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 18:38:42,699 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 18:38:42,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 18:38:42,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 18:38:42,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 18:38:42,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 18:38:42,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 18:38:42,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 18:38:42,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 18:38:42,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 18:38:42,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 18:38:42,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 18:38:42,701 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 18:38:42,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 18:38:42,701 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 18:38:42,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 18:38:43,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 18:38:43,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 18:38:43,012 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 18:38:43,013 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 18:38:43,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl [2021-08-12 18:38:43,014 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl' [2021-08-12 18:38:43,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 18:38:43,042 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 18:38:43,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 18:38:43,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 18:38:43,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 18:38:43,055 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 12.08 06:38:43" (1/1) ... [2021-08-12 18:38:43,061 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 12.08 06:38:43" (1/1) ... [2021-08-12 18:38:43,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 18:38:43,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 18:38:43,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 18:38:43,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 18:38:43,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:38:43" (1/1) ... [2021-08-12 18:38:43,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:38:43" (1/1) ... [2021-08-12 18:38:43,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:38:43" (1/1) ... [2021-08-12 18:38:43,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:38:43" (1/1) ... [2021-08-12 18:38:43,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:38:43" (1/1) ... [2021-08-12 18:38:43,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:38:43" (1/1) ... [2021-08-12 18:38:43,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:38:43" (1/1) ... [2021-08-12 18:38:43,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 18:38:43,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 18:38:43,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 18:38:43,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 18:38:43,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:38:43" (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 [2021-08-12 18:38:43,152 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 18:38:43,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 18:38:43,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 18:38:43,155 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-08-12 18:38:43,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-08-12 18:38:43,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-08-12 18:38:43,156 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 18:38:43,304 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 18:38:43,304 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-12 18:38:43,307 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:38:43 BoogieIcfgContainer [2021-08-12 18:38:43,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 18:38:43,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 18:38:43,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 18:38:43,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 18:38:43,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:38:43" (1/2) ... [2021-08-12 18:38:43,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539398b2 and model type fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 06:38:43, skipping insertion in model container [2021-08-12 18:38:43,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:38:43" (2/2) ... [2021-08-12 18:38:43,314 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe.bpl [2021-08-12 18:38:43,323 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 18:38:43,324 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 18:38:43,325 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 18:38:43,346 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,348 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,348 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,348 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,354 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 18:38:43,373 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 18:38:43,392 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:38:43,392 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:38:43,392 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:38:43,392 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:38:43,393 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:38:43,393 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:38:43,393 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:38:43,393 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:38:43,401 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 10 transitions, 25 flow [2021-08-12 18:38:43,415 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) [2021-08-12 18:38:43,418 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) [2021-08-12 18:38:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-12 18:38:43,423 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:43,424 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-12 18:38:43,425 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:43,432 INFO L82 PathProgramCache]: Analyzing trace with hash 43134170, now seen corresponding path program 1 times [2021-08-12 18:38:43,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:43,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790805008] [2021-08-12 18:38:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:38:43,502 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:38:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:38:43,508 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:38:43,520 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 18:38:43,520 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 18:38:43,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 18:38:43,521 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 18:38:43,521 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-08-12 18:38:43,526 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,526 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,526 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,527 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,527 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,527 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,528 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,528 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,532 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 18:38:43,532 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-12 18:38:43,534 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:38:43,534 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:38:43,535 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:38:43,535 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:38:43,535 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:38:43,535 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:38:43,535 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:38:43,535 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:38:43,537 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2021-08-12 18:38:43,549 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) [2021-08-12 18:38:43,551 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) [2021-08-12 18:38:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-12 18:38:43,551 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:43,551 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-12 18:38:43,552 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:43,553 INFO L82 PathProgramCache]: Analyzing trace with hash 57452648, now seen corresponding path program 1 times [2021-08-12 18:38:43,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:43,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377791068] [2021-08-12 18:38:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:43,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:43,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377791068] [2021-08-12 18:38:43,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377791068] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:43,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:43,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:38:43,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774185841] [2021-08-12 18:38:43,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:38:43,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:43,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:38:43,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:38:43,705 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) [2021-08-12 18:38:43,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:43,814 INFO L93 Difference]: Finished difference Result 135 states and 290 transitions. [2021-08-12 18:38:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:38:43,824 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 [2021-08-12 18:38:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:43,839 INFO L225 Difference]: With dead ends: 135 [2021-08-12 18:38:43,839 INFO L226 Difference]: Without dead ends: 103 [2021-08-12 18:38:43,842 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:38:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-12 18:38:43,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-08-12 18:38:43,909 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) [2021-08-12 18:38:43,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 229 transitions. [2021-08-12 18:38:43,918 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 229 transitions. Word has length 5 [2021-08-12 18:38:43,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:43,918 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 229 transitions. [2021-08-12 18:38:43,918 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) [2021-08-12 18:38:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 229 transitions. [2021-08-12 18:38:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-12 18:38:43,919 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:43,919 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-08-12 18:38:43,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 18:38:43,920 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:43,922 INFO L82 PathProgramCache]: Analyzing trace with hash -622629923, now seen corresponding path program 1 times [2021-08-12 18:38:43,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:43,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7546053] [2021-08-12 18:38:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:38:43,938 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:38:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:38:43,948 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:38:43,950 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 18:38:43,950 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 18:38:43,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 18:38:43,951 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 18:38:43,951 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-08-12 18:38:43,958 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,958 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,960 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,960 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,962 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,962 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,962 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,962 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,962 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,963 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,963 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,963 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:43,972 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 18:38:43,972 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-12 18:38:43,973 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:38:43,973 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:38:43,974 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:38:43,974 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:38:43,974 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:38:43,974 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:38:43,974 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:38:43,974 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:38:43,975 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 61 flow [2021-08-12 18:38:44,003 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) [2021-08-12 18:38:44,007 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) [2021-08-12 18:38:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-12 18:38:44,008 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:44,008 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-12 18:38:44,008 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:44,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:44,012 INFO L82 PathProgramCache]: Analyzing trace with hash 76542848, now seen corresponding path program 1 times [2021-08-12 18:38:44,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:44,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464428121] [2021-08-12 18:38:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:44,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:44,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464428121] [2021-08-12 18:38:44,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464428121] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:44,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:44,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:38:44,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116488522] [2021-08-12 18:38:44,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:38:44,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:44,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:38:44,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:38:44,086 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) [2021-08-12 18:38:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:44,252 INFO L93 Difference]: Finished difference Result 702 states and 2046 transitions. [2021-08-12 18:38:44,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:38:44,259 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 [2021-08-12 18:38:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:44,273 INFO L225 Difference]: With dead ends: 702 [2021-08-12 18:38:44,273 INFO L226 Difference]: Without dead ends: 567 [2021-08-12 18:38:44,275 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:38:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-08-12 18:38:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-08-12 18:38:44,341 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) [2021-08-12 18:38:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1719 transitions. [2021-08-12 18:38:44,349 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1719 transitions. Word has length 5 [2021-08-12 18:38:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:44,349 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1719 transitions. [2021-08-12 18:38:44,349 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) [2021-08-12 18:38:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1719 transitions. [2021-08-12 18:38:44,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-12 18:38:44,350 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:44,350 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:44,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 18:38:44,351 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:44,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:44,351 INFO L82 PathProgramCache]: Analyzing trace with hash 542941744, now seen corresponding path program 1 times [2021-08-12 18:38:44,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:44,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896396671] [2021-08-12 18:38:44,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:44,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:44,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896396671] [2021-08-12 18:38:44,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896396671] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:44,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:44,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:38:44,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063049681] [2021-08-12 18:38:44,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:38:44,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:44,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:38:44,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:38:44,414 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) [2021-08-12 18:38:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:44,679 INFO L93 Difference]: Finished difference Result 1295 states and 3871 transitions. [2021-08-12 18:38:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:38:44,679 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 [2021-08-12 18:38:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:44,690 INFO L225 Difference]: With dead ends: 1295 [2021-08-12 18:38:44,690 INFO L226 Difference]: Without dead ends: 1180 [2021-08-12 18:38:44,694 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:38:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-08-12 18:38:44,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 560. [2021-08-12 18:38:44,743 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) [2021-08-12 18:38:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1695 transitions. [2021-08-12 18:38:44,746 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1695 transitions. Word has length 7 [2021-08-12 18:38:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:44,747 INFO L482 AbstractCegarLoop]: Abstraction has 560 states and 1695 transitions. [2021-08-12 18:38:44,747 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) [2021-08-12 18:38:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1695 transitions. [2021-08-12 18:38:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-12 18:38:44,748 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:44,748 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:44,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 18:38:44,748 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:44,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash -339906921, now seen corresponding path program 1 times [2021-08-12 18:38:44,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:44,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726537270] [2021-08-12 18:38:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:44,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:44,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726537270] [2021-08-12 18:38:44,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726537270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:38:44,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223043715] [2021-08-12 18:38:44,812 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 [2021-08-12 18:38:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:38:44,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:38:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:44,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223043715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:38:44,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:38:44,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 18:38:44,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691950961] [2021-08-12 18:38:44,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:38:44,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:44,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:38:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:38:44,974 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) [2021-08-12 18:38:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:45,079 INFO L93 Difference]: Finished difference Result 744 states and 2163 transitions. [2021-08-12 18:38:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:38:45,079 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 [2021-08-12 18:38:45,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:45,084 INFO L225 Difference]: With dead ends: 744 [2021-08-12 18:38:45,084 INFO L226 Difference]: Without dead ends: 632 [2021-08-12 18:38:45,085 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:38:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-08-12 18:38:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 512. [2021-08-12 18:38:45,107 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) [2021-08-12 18:38:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1540 transitions. [2021-08-12 18:38:45,110 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1540 transitions. Word has length 8 [2021-08-12 18:38:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:45,111 INFO L482 AbstractCegarLoop]: Abstraction has 512 states and 1540 transitions. [2021-08-12 18:38:45,111 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) [2021-08-12 18:38:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1540 transitions. [2021-08-12 18:38:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-12 18:38:45,112 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:45,112 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:45,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-12 18:38:45,335 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:45,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash -339906925, now seen corresponding path program 1 times [2021-08-12 18:38:45,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:45,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60306203] [2021-08-12 18:38:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:38:45,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:45,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60306203] [2021-08-12 18:38:45,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60306203] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:45,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:45,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:38:45,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789372567] [2021-08-12 18:38:45,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:38:45,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:38:45,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:38:45,389 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) [2021-08-12 18:38:45,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:45,651 INFO L93 Difference]: Finished difference Result 1586 states and 4736 transitions. [2021-08-12 18:38:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:38:45,653 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 [2021-08-12 18:38:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:45,665 INFO L225 Difference]: With dead ends: 1586 [2021-08-12 18:38:45,665 INFO L226 Difference]: Without dead ends: 1492 [2021-08-12 18:38:45,667 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:38:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-12 18:38:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 551. [2021-08-12 18:38:45,706 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) [2021-08-12 18:38:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1659 transitions. [2021-08-12 18:38:45,710 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1659 transitions. Word has length 8 [2021-08-12 18:38:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:45,711 INFO L482 AbstractCegarLoop]: Abstraction has 551 states and 1659 transitions. [2021-08-12 18:38:45,711 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) [2021-08-12 18:38:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1659 transitions. [2021-08-12 18:38:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-12 18:38:45,713 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:45,713 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:45,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 18:38:45,713 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:45,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:45,713 INFO L82 PathProgramCache]: Analyzing trace with hash -348844225, now seen corresponding path program 2 times [2021-08-12 18:38:45,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:45,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734274616] [2021-08-12 18:38:45,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:38:45,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:45,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734274616] [2021-08-12 18:38:45,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734274616] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:45,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:45,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:38:45,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051236570] [2021-08-12 18:38:45,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:38:45,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:45,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:38:45,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:38:45,788 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) [2021-08-12 18:38:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:46,073 INFO L93 Difference]: Finished difference Result 1401 states and 4204 transitions. [2021-08-12 18:38:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:38:46,073 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 [2021-08-12 18:38:46,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:46,083 INFO L225 Difference]: With dead ends: 1401 [2021-08-12 18:38:46,083 INFO L226 Difference]: Without dead ends: 1307 [2021-08-12 18:38:46,084 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:38:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-08-12 18:38:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 548. [2021-08-12 18:38:46,132 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) [2021-08-12 18:38:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1654 transitions. [2021-08-12 18:38:46,139 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1654 transitions. Word has length 8 [2021-08-12 18:38:46,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:46,140 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1654 transitions. [2021-08-12 18:38:46,140 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) [2021-08-12 18:38:46,140 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1654 transitions. [2021-08-12 18:38:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-12 18:38:46,141 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:46,141 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:46,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-12 18:38:46,141 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:46,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:46,141 INFO L82 PathProgramCache]: Analyzing trace with hash -348671245, now seen corresponding path program 3 times [2021-08-12 18:38:46,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:46,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032698807] [2021-08-12 18:38:46,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:46,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:46,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032698807] [2021-08-12 18:38:46,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032698807] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:46,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:46,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:38:46,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848037066] [2021-08-12 18:38:46,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:38:46,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:46,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:38:46,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:38:46,207 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) [2021-08-12 18:38:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:46,488 INFO L93 Difference]: Finished difference Result 1232 states and 3720 transitions. [2021-08-12 18:38:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:38:46,489 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 [2021-08-12 18:38:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:46,497 INFO L225 Difference]: With dead ends: 1232 [2021-08-12 18:38:46,497 INFO L226 Difference]: Without dead ends: 1116 [2021-08-12 18:38:46,498 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:38:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-08-12 18:38:46,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 467. [2021-08-12 18:38:46,522 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) [2021-08-12 18:38:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1401 transitions. [2021-08-12 18:38:46,526 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1401 transitions. Word has length 8 [2021-08-12 18:38:46,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:46,526 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1401 transitions. [2021-08-12 18:38:46,526 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) [2021-08-12 18:38:46,526 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1401 transitions. [2021-08-12 18:38:46,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-12 18:38:46,527 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:46,527 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:46,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-12 18:38:46,527 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:46,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2075805806, now seen corresponding path program 1 times [2021-08-12 18:38:46,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:46,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911627935] [2021-08-12 18:38:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:38:46,532 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:38:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:38:46,534 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:38:46,536 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 18:38:46,536 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 18:38:46,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-12 18:38:46,536 WARN L235 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 18:38:46,536 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-08-12 18:38:46,540 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,540 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,541 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,541 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,541 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,541 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,541 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,541 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,542 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,542 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,542 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,542 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,542 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,542 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,542 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,542 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:46,546 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 18:38:46,546 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-12 18:38:46,547 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:38:46,547 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:38:46,547 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:38:46,547 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:38:46,547 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:38:46,548 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:38:46,548 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:38:46,548 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:38:46,548 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-08-12 18:38:46,705 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) [2021-08-12 18:38:46,716 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) [2021-08-12 18:38:46,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-12 18:38:46,717 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:46,717 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-12 18:38:46,717 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:46,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:46,717 INFO L82 PathProgramCache]: Analyzing trace with hash 100404189, now seen corresponding path program 1 times [2021-08-12 18:38:46,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:46,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067689829] [2021-08-12 18:38:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:46,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:46,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067689829] [2021-08-12 18:38:46,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067689829] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:46,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:46,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:38:46,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651493789] [2021-08-12 18:38:46,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:38:46,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:46,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:38:46,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:38:46,765 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) [2021-08-12 18:38:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:46,880 INFO L93 Difference]: Finished difference Result 3549 states and 13143 transitions. [2021-08-12 18:38:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:38:46,881 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 [2021-08-12 18:38:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:46,906 INFO L225 Difference]: With dead ends: 3549 [2021-08-12 18:38:46,906 INFO L226 Difference]: Without dead ends: 2923 [2021-08-12 18:38:46,908 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:38:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-08-12 18:38:47,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2923. [2021-08-12 18:38:47,060 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) [2021-08-12 18:38:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 11198 transitions. [2021-08-12 18:38:47,088 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 11198 transitions. Word has length 5 [2021-08-12 18:38:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:47,088 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 11198 transitions. [2021-08-12 18:38:47,088 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) [2021-08-12 18:38:47,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 11198 transitions. [2021-08-12 18:38:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-12 18:38:47,091 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:47,091 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:47,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-12 18:38:47,091 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:47,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:47,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1998981745, now seen corresponding path program 1 times [2021-08-12 18:38:47,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:47,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036258040] [2021-08-12 18:38:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:47,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:47,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036258040] [2021-08-12 18:38:47,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036258040] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:47,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:47,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:38:47,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866575485] [2021-08-12 18:38:47,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:38:47,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:47,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:38:47,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:38:47,135 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) [2021-08-12 18:38:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:47,493 INFO L93 Difference]: Finished difference Result 7278 states and 27628 transitions. [2021-08-12 18:38:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:38:47,493 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 [2021-08-12 18:38:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:47,559 INFO L225 Difference]: With dead ends: 7278 [2021-08-12 18:38:47,559 INFO L226 Difference]: Without dead ends: 6688 [2021-08-12 18:38:47,566 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:38:47,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2021-08-12 18:38:47,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 2913. [2021-08-12 18:38:47,799 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) [2021-08-12 18:38:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 11158 transitions. [2021-08-12 18:38:47,824 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 11158 transitions. Word has length 7 [2021-08-12 18:38:47,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:47,824 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 11158 transitions. [2021-08-12 18:38:47,824 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) [2021-08-12 18:38:47,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 11158 transitions. [2021-08-12 18:38:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-12 18:38:47,825 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:47,825 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:47,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-12 18:38:47,825 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:47,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1838888163, now seen corresponding path program 1 times [2021-08-12 18:38:47,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:47,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973205505] [2021-08-12 18:38:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:47,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:47,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973205505] [2021-08-12 18:38:47,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973205505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:38:47,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207780505] [2021-08-12 18:38:47,861 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 [2021-08-12 18:38:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:47,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:38:47,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:38:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:48,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207780505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:38:48,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:38:48,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 18:38:48,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045156284] [2021-08-12 18:38:48,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:38:48,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:38:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:38:48,039 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) [2021-08-12 18:38:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:48,274 INFO L93 Difference]: Finished difference Result 4377 states and 16090 transitions. [2021-08-12 18:38:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:38:48,275 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 [2021-08-12 18:38:48,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:48,294 INFO L225 Difference]: With dead ends: 4377 [2021-08-12 18:38:48,295 INFO L226 Difference]: Without dead ends: 3793 [2021-08-12 18:38:48,297 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:38:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2021-08-12 18:38:48,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 2825. [2021-08-12 18:38:48,429 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) [2021-08-12 18:38:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 10809 transitions. [2021-08-12 18:38:48,444 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 10809 transitions. Word has length 8 [2021-08-12 18:38:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:48,445 INFO L482 AbstractCegarLoop]: Abstraction has 2825 states and 10809 transitions. [2021-08-12 18:38:48,446 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) [2021-08-12 18:38:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 10809 transitions. [2021-08-12 18:38:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-12 18:38:48,446 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:48,446 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:48,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-12 18:38:48,665 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:48,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:48,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1838888167, now seen corresponding path program 1 times [2021-08-12 18:38:48,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:48,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173109956] [2021-08-12 18:38:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:48,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:48,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173109956] [2021-08-12 18:38:48,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173109956] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:48,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:48,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:38:48,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508496319] [2021-08-12 18:38:48,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:38:48,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:48,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:38:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:38:48,724 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) [2021-08-12 18:38:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:49,118 INFO L93 Difference]: Finished difference Result 7073 states and 26901 transitions. [2021-08-12 18:38:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:38:49,118 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 [2021-08-12 18:38:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:49,150 INFO L225 Difference]: With dead ends: 7073 [2021-08-12 18:38:49,150 INFO L226 Difference]: Without dead ends: 6488 [2021-08-12 18:38:49,155 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:38:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6488 states. [2021-08-12 18:38:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6488 to 2836. [2021-08-12 18:38:49,339 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) [2021-08-12 18:38:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 10824 transitions. [2021-08-12 18:38:49,355 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 10824 transitions. Word has length 8 [2021-08-12 18:38:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:49,356 INFO L482 AbstractCegarLoop]: Abstraction has 2836 states and 10824 transitions. [2021-08-12 18:38:49,356 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) [2021-08-12 18:38:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 10824 transitions. [2021-08-12 18:38:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-12 18:38:49,357 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:49,357 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:49,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-12 18:38:49,358 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:49,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1843846927, now seen corresponding path program 2 times [2021-08-12 18:38:49,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:49,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247905256] [2021-08-12 18:38:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:38:49,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:49,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247905256] [2021-08-12 18:38:49,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247905256] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:49,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:49,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:38:49,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196877623] [2021-08-12 18:38:49,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:38:49,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:49,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:38:49,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:38:49,409 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) [2021-08-12 18:38:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:49,789 INFO L93 Difference]: Finished difference Result 8359 states and 31579 transitions. [2021-08-12 18:38:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:38:49,790 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 [2021-08-12 18:38:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:49,831 INFO L225 Difference]: With dead ends: 8359 [2021-08-12 18:38:49,831 INFO L226 Difference]: Without dead ends: 7888 [2021-08-12 18:38:49,836 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:38:49,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7888 states. [2021-08-12 18:38:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7888 to 2743. [2021-08-12 18:38:50,019 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) [2021-08-12 18:38:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 10492 transitions. [2021-08-12 18:38:50,039 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 10492 transitions. Word has length 8 [2021-08-12 18:38:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:50,040 INFO L482 AbstractCegarLoop]: Abstraction has 2743 states and 10492 transitions. [2021-08-12 18:38:50,040 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) [2021-08-12 18:38:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 10492 transitions. [2021-08-12 18:38:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-12 18:38:50,041 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:50,041 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:50,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-12 18:38:50,041 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1170789958, now seen corresponding path program 1 times [2021-08-12 18:38:50,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:50,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483498546] [2021-08-12 18:38:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:50,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:50,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483498546] [2021-08-12 18:38:50,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483498546] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:50,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:50,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:38:50,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85060331] [2021-08-12 18:38:50,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:38:50,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:50,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:38:50,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:38:50,088 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) [2021-08-12 18:38:50,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:50,494 INFO L93 Difference]: Finished difference Result 6838 states and 25925 transitions. [2021-08-12 18:38:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:38:50,499 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 [2021-08-12 18:38:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:50,534 INFO L225 Difference]: With dead ends: 6838 [2021-08-12 18:38:50,534 INFO L226 Difference]: Without dead ends: 6277 [2021-08-12 18:38:50,539 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:38:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2021-08-12 18:38:50,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 2736. [2021-08-12 18:38:50,679 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) [2021-08-12 18:38:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 10461 transitions. [2021-08-12 18:38:50,696 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 10461 transitions. Word has length 9 [2021-08-12 18:38:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:50,697 INFO L482 AbstractCegarLoop]: Abstraction has 2736 states and 10461 transitions. [2021-08-12 18:38:50,697 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) [2021-08-12 18:38:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 10461 transitions. [2021-08-12 18:38:50,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 18:38:50,697 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:50,697 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:50,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-12 18:38:50,698 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:50,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1934750506, now seen corresponding path program 1 times [2021-08-12 18:38:50,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:50,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261289561] [2021-08-12 18:38:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:50,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:50,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261289561] [2021-08-12 18:38:50,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261289561] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:50,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:50,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 18:38:50,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849548366] [2021-08-12 18:38:50,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:38:50,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:50,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:38:50,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:38:50,740 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) [2021-08-12 18:38:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:51,219 INFO L93 Difference]: Finished difference Result 6691 states and 25431 transitions. [2021-08-12 18:38:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:38:51,220 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 [2021-08-12 18:38:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:51,248 INFO L225 Difference]: With dead ends: 6691 [2021-08-12 18:38:51,248 INFO L226 Difference]: Without dead ends: 6137 [2021-08-12 18:38:51,254 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:38:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6137 states. [2021-08-12 18:38:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6137 to 2750. [2021-08-12 18:38:51,399 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) [2021-08-12 18:38:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 10496 transitions. [2021-08-12 18:38:51,419 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 10496 transitions. Word has length 10 [2021-08-12 18:38:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:51,420 INFO L482 AbstractCegarLoop]: Abstraction has 2750 states and 10496 transitions. [2021-08-12 18:38:51,420 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) [2021-08-12 18:38:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 10496 transitions. [2021-08-12 18:38:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 18:38:51,420 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:51,420 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:51,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-12 18:38:51,421 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:51,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1884882076, now seen corresponding path program 2 times [2021-08-12 18:38:51,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:51,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987378600] [2021-08-12 18:38:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:38:51,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:51,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987378600] [2021-08-12 18:38:51,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987378600] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:51,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:51,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:38:51,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508351293] [2021-08-12 18:38:51,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:38:51,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:51,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:38:51,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:38:51,471 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) [2021-08-12 18:38:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:51,902 INFO L93 Difference]: Finished difference Result 9217 states and 35064 transitions. [2021-08-12 18:38:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:38:51,902 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 [2021-08-12 18:38:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:51,942 INFO L225 Difference]: With dead ends: 9217 [2021-08-12 18:38:51,942 INFO L226 Difference]: Without dead ends: 8764 [2021-08-12 18:38:51,948 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:38:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2021-08-12 18:38:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 2678. [2021-08-12 18:38:52,113 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) [2021-08-12 18:38:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 10217 transitions. [2021-08-12 18:38:52,182 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 10217 transitions. Word has length 10 [2021-08-12 18:38:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:52,182 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 10217 transitions. [2021-08-12 18:38:52,182 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) [2021-08-12 18:38:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 10217 transitions. [2021-08-12 18:38:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 18:38:52,183 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:52,183 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:52,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-12 18:38:52,184 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:52,184 INFO L82 PathProgramCache]: Analyzing trace with hash -152320659, now seen corresponding path program 1 times [2021-08-12 18:38:52,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:52,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158082378] [2021-08-12 18:38:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:38:52,188 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:38:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:38:52,190 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:38:52,197 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 18:38:52,198 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 18:38:52,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-12 18:38:52,198 WARN L235 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 18:38:52,198 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-08-12 18:38:52,204 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,204 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,204 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,204 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,205 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,205 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,205 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,205 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,205 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,205 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,205 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,205 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,206 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,209 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,209 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,209 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,210 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,210 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,210 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,210 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:38:52,215 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 18:38:52,216 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-12 18:38:52,219 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:38:52,219 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:38:52,219 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:38:52,219 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:38:52,219 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:38:52,219 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:38:52,219 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:38:52,219 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:38:52,222 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 30 transitions, 105 flow [2021-08-12 18:38:53,601 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) [2021-08-12 18:38:53,645 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) [2021-08-12 18:38:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-12 18:38:53,646 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:53,646 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-12 18:38:53,646 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash 129037055, now seen corresponding path program 1 times [2021-08-12 18:38:53,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:53,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861778631] [2021-08-12 18:38:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:53,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:53,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861778631] [2021-08-12 18:38:53,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861778631] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:53,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:53,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:38:53,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053705884] [2021-08-12 18:38:53,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:38:53,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:53,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:38:53,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:38:53,695 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) [2021-08-12 18:38:54,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:54,112 INFO L93 Difference]: Finished difference Result 17796 states and 80077 transitions. [2021-08-12 18:38:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:38:54,116 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 [2021-08-12 18:38:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:54,226 INFO L225 Difference]: With dead ends: 17796 [2021-08-12 18:38:54,227 INFO L226 Difference]: Without dead ends: 14763 [2021-08-12 18:38:54,238 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:38:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14763 states. [2021-08-12 18:38:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14763 to 14763. [2021-08-12 18:38:55,338 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) [2021-08-12 18:38:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14763 states to 14763 states and 68362 transitions. [2021-08-12 18:38:55,441 INFO L78 Accepts]: Start accepts. Automaton has 14763 states and 68362 transitions. Word has length 5 [2021-08-12 18:38:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:55,441 INFO L482 AbstractCegarLoop]: Abstraction has 14763 states and 68362 transitions. [2021-08-12 18:38:55,441 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) [2021-08-12 18:38:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 14763 states and 68362 transitions. [2021-08-12 18:38:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-12 18:38:55,442 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:55,442 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:55,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-12 18:38:55,442 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:55,443 INFO L82 PathProgramCache]: Analyzing trace with hash -549477417, now seen corresponding path program 1 times [2021-08-12 18:38:55,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:55,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262328508] [2021-08-12 18:38:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:55,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:55,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262328508] [2021-08-12 18:38:55,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262328508] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:55,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:55,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:38:55,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151220994] [2021-08-12 18:38:55,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:38:55,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:55,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:38:55,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:38:55,480 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) [2021-08-12 18:38:56,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:56,367 INFO L93 Difference]: Finished difference Result 38545 states and 177191 transitions. [2021-08-12 18:38:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:38:56,368 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 [2021-08-12 18:38:56,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:56,548 INFO L225 Difference]: With dead ends: 38545 [2021-08-12 18:38:56,549 INFO L226 Difference]: Without dead ends: 35580 [2021-08-12 18:38:56,569 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:38:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35580 states. [2021-08-12 18:38:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35580 to 14750. [2021-08-12 18:38:57,828 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) [2021-08-12 18:38:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14750 states to 14750 states and 68303 transitions. [2021-08-12 18:38:57,926 INFO L78 Accepts]: Start accepts. Automaton has 14750 states and 68303 transitions. Word has length 7 [2021-08-12 18:38:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:57,926 INFO L482 AbstractCegarLoop]: Abstraction has 14750 states and 68303 transitions. [2021-08-12 18:38:57,926 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) [2021-08-12 18:38:57,926 INFO L276 IsEmpty]: Start isEmpty. Operand 14750 states and 68303 transitions. [2021-08-12 18:38:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-12 18:38:57,927 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:57,927 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:57,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-12 18:38:57,927 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:57,927 INFO L82 PathProgramCache]: Analyzing trace with hash 147218695, now seen corresponding path program 1 times [2021-08-12 18:38:57,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:57,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220644220] [2021-08-12 18:38:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:57,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:57,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220644220] [2021-08-12 18:38:57,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220644220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:38:57,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759217542] [2021-08-12 18:38:57,975 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 [2021-08-12 18:38:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:58,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:38:58,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:38:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:38:58,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759217542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:38:58,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:38:58,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 18:38:58,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358901084] [2021-08-12 18:38:58,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:38:58,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:58,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:38:58,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:38:58,100 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) [2021-08-12 18:38:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:38:58,783 INFO L93 Difference]: Finished difference Result 23142 states and 103291 transitions. [2021-08-12 18:38:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:38:58,793 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 [2021-08-12 18:38:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:38:58,889 INFO L225 Difference]: With dead ends: 23142 [2021-08-12 18:38:58,890 INFO L226 Difference]: Without dead ends: 20186 [2021-08-12 18:38:58,898 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:38:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20186 states. [2021-08-12 18:38:59,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20186 to 14610. [2021-08-12 18:38:59,644 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) [2021-08-12 18:38:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14610 states to 14610 states and 67647 transitions. [2021-08-12 18:38:59,718 INFO L78 Accepts]: Start accepts. Automaton has 14610 states and 67647 transitions. Word has length 8 [2021-08-12 18:38:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:38:59,719 INFO L482 AbstractCegarLoop]: Abstraction has 14610 states and 67647 transitions. [2021-08-12 18:38:59,719 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) [2021-08-12 18:38:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 14610 states and 67647 transitions. [2021-08-12 18:38:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-12 18:38:59,719 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:38:59,719 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:38:59,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-12 18:38:59,920 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:38:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:38:59,920 INFO L82 PathProgramCache]: Analyzing trace with hash 147218699, now seen corresponding path program 1 times [2021-08-12 18:38:59,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:38:59,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135523237] [2021-08-12 18:38:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:38:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:38:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:38:59,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:38:59,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135523237] [2021-08-12 18:38:59,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135523237] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:38:59,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:38:59,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:38:59,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522884984] [2021-08-12 18:38:59,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:38:59,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:38:59,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:38:59,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:38:59,953 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) [2021-08-12 18:39:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:00,876 INFO L93 Difference]: Finished difference Result 43556 states and 199400 transitions. [2021-08-12 18:39:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:39:00,876 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 [2021-08-12 18:39:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:01,074 INFO L225 Difference]: With dead ends: 43556 [2021-08-12 18:39:01,074 INFO L226 Difference]: Without dead ends: 41188 [2021-08-12 18:39:01,090 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:39:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41188 states. [2021-08-12 18:39:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41188 to 14685. [2021-08-12 18:39:02,174 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) [2021-08-12 18:39:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14685 states to 14685 states and 67964 transitions. [2021-08-12 18:39:02,249 INFO L78 Accepts]: Start accepts. Automaton has 14685 states and 67964 transitions. Word has length 8 [2021-08-12 18:39:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:02,249 INFO L482 AbstractCegarLoop]: Abstraction has 14685 states and 67964 transitions. [2021-08-12 18:39:02,250 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) [2021-08-12 18:39:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 14685 states and 67964 transitions. [2021-08-12 18:39:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-12 18:39:02,250 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:02,250 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:02,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-12 18:39:02,250 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash 145431239, now seen corresponding path program 2 times [2021-08-12 18:39:02,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:02,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407653175] [2021-08-12 18:39:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:39:02,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:02,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407653175] [2021-08-12 18:39:02,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407653175] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:39:02,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:39:02,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:39:02,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516808003] [2021-08-12 18:39:02,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:39:02,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:02,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:39:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:39:02,287 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) [2021-08-12 18:39:03,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:03,284 INFO L93 Difference]: Finished difference Result 38389 states and 176723 transitions. [2021-08-12 18:39:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:39:03,284 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 [2021-08-12 18:39:03,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:03,462 INFO L225 Difference]: With dead ends: 38389 [2021-08-12 18:39:03,462 INFO L226 Difference]: Without dead ends: 36021 [2021-08-12 18:39:03,474 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:39:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36021 states. [2021-08-12 18:39:04,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36021 to 14682. [2021-08-12 18:39:04,517 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) [2021-08-12 18:39:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14682 states to 14682 states and 67959 transitions. [2021-08-12 18:39:04,591 INFO L78 Accepts]: Start accepts. Automaton has 14682 states and 67959 transitions. Word has length 8 [2021-08-12 18:39:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:04,592 INFO L482 AbstractCegarLoop]: Abstraction has 14682 states and 67959 transitions. [2021-08-12 18:39:04,592 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) [2021-08-12 18:39:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 14682 states and 67959 transitions. [2021-08-12 18:39:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-12 18:39:04,592 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:04,592 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:04,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-12 18:39:04,593 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:04,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:04,593 INFO L82 PathProgramCache]: Analyzing trace with hash 146065499, now seen corresponding path program 3 times [2021-08-12 18:39:04,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:04,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123998183] [2021-08-12 18:39:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:04,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:04,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123998183] [2021-08-12 18:39:04,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123998183] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:39:04,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:39:04,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:39:04,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072304848] [2021-08-12 18:39:04,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:39:04,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:04,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:39:04,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:39:04,646 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) [2021-08-12 18:39:05,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:05,741 INFO L93 Difference]: Finished difference Result 38282 states and 176111 transitions. [2021-08-12 18:39:05,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:39:05,741 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 [2021-08-12 18:39:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:06,022 INFO L225 Difference]: With dead ends: 38282 [2021-08-12 18:39:06,022 INFO L226 Difference]: Without dead ends: 35328 [2021-08-12 18:39:06,035 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:39:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35328 states. [2021-08-12 18:39:07,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35328 to 14479. [2021-08-12 18:39:07,031 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) [2021-08-12 18:39:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14479 states to 14479 states and 67042 transitions. [2021-08-12 18:39:07,096 INFO L78 Accepts]: Start accepts. Automaton has 14479 states and 67042 transitions. Word has length 8 [2021-08-12 18:39:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:07,097 INFO L482 AbstractCegarLoop]: Abstraction has 14479 states and 67042 transitions. [2021-08-12 18:39:07,097 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) [2021-08-12 18:39:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 14479 states and 67042 transitions. [2021-08-12 18:39:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-12 18:39:07,097 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:07,097 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:07,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-12 18:39:07,097 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:07,098 INFO L82 PathProgramCache]: Analyzing trace with hash 233022064, now seen corresponding path program 1 times [2021-08-12 18:39:07,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:07,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816545926] [2021-08-12 18:39:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:07,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:07,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816545926] [2021-08-12 18:39:07,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816545926] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:39:07,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:39:07,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:39:07,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426862562] [2021-08-12 18:39:07,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:39:07,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:07,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:39:07,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:39:07,134 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) [2021-08-12 18:39:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:08,109 INFO L93 Difference]: Finished difference Result 40249 states and 185950 transitions. [2021-08-12 18:39:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:39:08,110 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 [2021-08-12 18:39:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:08,302 INFO L225 Difference]: With dead ends: 40249 [2021-08-12 18:39:08,303 INFO L226 Difference]: Without dead ends: 37319 [2021-08-12 18:39:08,317 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:39:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37319 states. [2021-08-12 18:39:09,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37319 to 14469. [2021-08-12 18:39:09,382 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) [2021-08-12 18:39:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14469 states to 14469 states and 66992 transitions. [2021-08-12 18:39:09,449 INFO L78 Accepts]: Start accepts. Automaton has 14469 states and 66992 transitions. Word has length 9 [2021-08-12 18:39:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:09,450 INFO L482 AbstractCegarLoop]: Abstraction has 14469 states and 66992 transitions. [2021-08-12 18:39:09,450 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) [2021-08-12 18:39:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 14469 states and 66992 transitions. [2021-08-12 18:39:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 18:39:09,450 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:09,450 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:09,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-12 18:39:09,450 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:09,451 INFO L82 PathProgramCache]: Analyzing trace with hash -256908636, now seen corresponding path program 1 times [2021-08-12 18:39:09,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:09,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134324578] [2021-08-12 18:39:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:39:09,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:09,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134324578] [2021-08-12 18:39:09,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134324578] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:39:09,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:39:09,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:39:09,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436729849] [2021-08-12 18:39:09,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:39:09,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:09,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:39:09,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:39:09,484 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) [2021-08-12 18:39:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:10,689 INFO L93 Difference]: Finished difference Result 51953 states and 239490 transitions. [2021-08-12 18:39:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:39:10,689 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 [2021-08-12 18:39:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:10,907 INFO L225 Difference]: With dead ends: 51953 [2021-08-12 18:39:10,907 INFO L226 Difference]: Without dead ends: 49141 [2021-08-12 18:39:10,927 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:39:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49141 states. [2021-08-12 18:39:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49141 to 14595. [2021-08-12 18:39:12,195 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) [2021-08-12 18:39:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14595 states to 14595 states and 67568 transitions. [2021-08-12 18:39:12,273 INFO L78 Accepts]: Start accepts. Automaton has 14595 states and 67568 transitions. Word has length 10 [2021-08-12 18:39:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:12,274 INFO L482 AbstractCegarLoop]: Abstraction has 14595 states and 67568 transitions. [2021-08-12 18:39:12,274 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) [2021-08-12 18:39:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 14595 states and 67568 transitions. [2021-08-12 18:39:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 18:39:12,274 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:12,274 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:12,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-12 18:39:12,274 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:12,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:12,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1366921296, now seen corresponding path program 2 times [2021-08-12 18:39:12,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:12,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856859717] [2021-08-12 18:39:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:39:12,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:12,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856859717] [2021-08-12 18:39:12,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856859717] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:39:12,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:39:12,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:39:12,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156703364] [2021-08-12 18:39:12,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:39:12,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:12,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:39:12,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:39:12,318 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) [2021-08-12 18:39:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:13,499 INFO L93 Difference]: Finished difference Result 41235 states and 190765 transitions. [2021-08-12 18:39:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:39:13,499 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 [2021-08-12 18:39:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:13,667 INFO L225 Difference]: With dead ends: 41235 [2021-08-12 18:39:13,667 INFO L226 Difference]: Without dead ends: 38423 [2021-08-12 18:39:13,683 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:39:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38423 states. [2021-08-12 18:39:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38423 to 14589. [2021-08-12 18:39:14,689 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) [2021-08-12 18:39:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14589 states to 14589 states and 67552 transitions. [2021-08-12 18:39:14,759 INFO L78 Accepts]: Start accepts. Automaton has 14589 states and 67552 transitions. Word has length 10 [2021-08-12 18:39:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:14,760 INFO L482 AbstractCegarLoop]: Abstraction has 14589 states and 67552 transitions. [2021-08-12 18:39:14,760 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) [2021-08-12 18:39:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 14589 states and 67552 transitions. [2021-08-12 18:39:14,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 18:39:14,760 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:14,760 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:14,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-12 18:39:14,760 INFO L430 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:14,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:14,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1366258206, now seen corresponding path program 3 times [2021-08-12 18:39:14,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:14,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700477373] [2021-08-12 18:39:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:14,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:14,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700477373] [2021-08-12 18:39:14,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700477373] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:39:14,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:39:14,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 18:39:14,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255418186] [2021-08-12 18:39:14,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:39:14,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:14,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:39:14,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:39:14,798 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) [2021-08-12 18:39:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:15,973 INFO L93 Difference]: Finished difference Result 40091 states and 185390 transitions. [2021-08-12 18:39:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:39:15,973 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 [2021-08-12 18:39:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:16,127 INFO L225 Difference]: With dead ends: 40091 [2021-08-12 18:39:16,127 INFO L226 Difference]: Without dead ends: 37171 [2021-08-12 18:39:16,143 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:39:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37171 states. [2021-08-12 18:39:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37171 to 14365. [2021-08-12 18:39:17,112 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) [2021-08-12 18:39:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14365 states to 14365 states and 66479 transitions. [2021-08-12 18:39:17,180 INFO L78 Accepts]: Start accepts. Automaton has 14365 states and 66479 transitions. Word has length 10 [2021-08-12 18:39:17,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:17,180 INFO L482 AbstractCegarLoop]: Abstraction has 14365 states and 66479 transitions. [2021-08-12 18:39:17,180 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) [2021-08-12 18:39:17,180 INFO L276 IsEmpty]: Start isEmpty. Operand 14365 states and 66479 transitions. [2021-08-12 18:39:17,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 18:39:17,181 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:17,181 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:17,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-12 18:39:17,181 INFO L430 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:17,181 INFO L82 PathProgramCache]: Analyzing trace with hash 630577724, now seen corresponding path program 1 times [2021-08-12 18:39:17,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:17,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307497974] [2021-08-12 18:39:17,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:39:17,184 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:39:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:39:17,186 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:39:17,188 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 18:39:17,188 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 18:39:17,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-12 18:39:17,190 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2021-08-12 18:39:17,201 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 06:39:17 BasicIcfg [2021-08-12 18:39:17,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 18:39:17,201 INFO L168 Benchmark]: Toolchain (without parser) took 34159.06 ms. Allocated memory was 197.1 MB in the beginning and 7.5 GB in the end (delta: 7.3 GB). Free memory was 176.9 MB in the beginning and 5.3 GB in the end (delta: -5.2 GB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-08-12 18:39:17,201 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 197.1 MB. Free memory is still 177.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 18:39:17,201 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.24 ms. Allocated memory is still 197.1 MB. Free memory was 176.8 MB in the beginning and 175.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 18:39:17,202 INFO L168 Benchmark]: Boogie Preprocessor took 13.22 ms. Allocated memory is still 197.1 MB. Free memory was 175.4 MB in the beginning and 174.5 MB in the end (delta: 903.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 18:39:17,202 INFO L168 Benchmark]: RCFGBuilder took 224.66 ms. Allocated memory is still 197.1 MB. Free memory was 174.4 MB in the beginning and 166.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-08-12 18:39:17,202 INFO L168 Benchmark]: TraceAbstraction took 33891.97 ms. Allocated memory was 197.1 MB in the beginning and 7.5 GB in the end (delta: 7.3 GB). Free memory was 165.6 MB in the beginning and 5.3 GB in the end (delta: -5.2 GB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-08-12 18:39:17,202 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 0.15 ms. Allocated memory is still 197.1 MB. Free memory is still 177.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.24 ms. Allocated memory is still 197.1 MB. Free memory was 176.8 MB in the beginning and 175.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.22 ms. Allocated memory is still 197.1 MB. Free memory was 175.4 MB in the beginning and 174.5 MB in the end (delta: 903.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 224.66 ms. Allocated memory is still 197.1 MB. Free memory was 174.4 MB in the beginning and 166.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 33891.97 ms. Allocated memory was 197.1 MB in the beginning and 7.5 GB in the end (delta: 7.3 GB). Free memory was 165.6 MB in the beginning and 5.3 GB in the end (delta: -5.2 GB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 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: 131.3ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 7.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.1ms, 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: 3.2ms SsaConstructionTime, 15.2ms 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: 416.6ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 1.7ms, AutomataDifference: 164.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8 SDtfs, 21 SDslu, 24 SDs, 0 SdLazy, 37 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.7ms 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: 63.1ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.9ms SsaConstructionTime, 12.2ms SatisfiabilityAnalysisTime, 109.1ms 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: 2563.0ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 6.9ms, AutomataDifference: 1449.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 75 SDtfs, 442 SDslu, 320 SDs, 0 SdLazy, 714 SolverSat, 106 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 466.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 439.4ms 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: 267.6ms AutomataMinimizationTime, 6 MinimizatonAttempts, 3089 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.9ms SsaConstructionTime, 47.1ms SatisfiabilityAnalysisTime, 435.7ms 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: 5650.9ms, OverallIterations: 9, TraceHistogramMax: 4, EmptinessCheckTime: 14.4ms, AutomataDifference: 3157.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 160.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 131 SDtfs, 821 SDslu, 563 SDs, 0 SdLazy, 1467 SolverSat, 214 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 848.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 525.7ms 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: 1489.9ms AutomataMinimizationTime, 8 MinimizatonAttempts, 26554 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.7ms SsaConstructionTime, 23.4ms SatisfiabilityAnalysisTime, 437.2ms 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: 24969.2ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 30.8ms, AutomataDifference: 11509.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1398.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 179 SDtfs, 1544 SDslu, 799 SDs, 0 SdLazy, 2167 SolverSat, 372 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1375.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 741.7ms 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: 11095.5ms AutomataMinimizationTime, 10 MinimizatonAttempts, 199133 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.4ms SsaConstructionTime, 22.9ms SatisfiabilityAnalysisTime, 409.8ms 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...