/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/pthread_nondet_loop_bound.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 20:37:41,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 20:37:41,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 20:37:41,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 20:37:41,433 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 [2021-03-10 20:37:41,463 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 20:37:41,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 20:37:41,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 20:37:41,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 20:37:41,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 20:37:41,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 20:37:41,467 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 20:37:41,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 20:37:41,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 20:37:41,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 20:37:41,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 20:37:41,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 20:37:41,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 20:37:41,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 20:37:41,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 20:37:41,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 20:37:41,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 20:37:41,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 20:37:41,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 20:37:41,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 20:37:41,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 20:37:41,470 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 20:37:41,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 20:37:41,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:37:41,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 20:37:41,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 20:37:41,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 20:37:41,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 20:37:41,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 20:37:41,471 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 20:37:41,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 20:37:41,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 20:37:41,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 20:37:41,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 20:37:41,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 20:37:41,826 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 20:37:41,827 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 20:37:41,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/pthread_nondet_loop_bound.bpl [2021-03-10 20:37:41,828 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/pthread_nondet_loop_bound.bpl' [2021-03-10 20:37:41,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 20:37:41,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 20:37:41,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 20:37:41,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 20:37:41,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 20:37:41,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:37:41" (1/1) ... [2021-03-10 20:37:41,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:37:41" (1/1) ... [2021-03-10 20:37:41,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 20:37:41,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 20:37:41,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 20:37:41,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 20:37:41,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:37:41" (1/1) ... [2021-03-10 20:37:41,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:37:41" (1/1) ... [2021-03-10 20:37:41,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:37:41" (1/1) ... [2021-03-10 20:37:41,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:37:41" (1/1) ... [2021-03-10 20:37:41,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:37:41" (1/1) ... [2021-03-10 20:37:41,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:37:41" (1/1) ... [2021-03-10 20:37:41,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:37:41" (1/1) ... [2021-03-10 20:37:41,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 20:37:41,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 20:37:41,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 20:37:41,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 20:37:41,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:37:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:37:41,964 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 20:37:41,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 20:37:41,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 20:37:41,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-03-10 20:37:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-03-10 20:37:41,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-03-10 20:37:41,968 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 20:37:42,082 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 20:37:42,082 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 20:37:42,083 INFO L202 PluginConnector]: Adding new model pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:37:42 BoogieIcfgContainer [2021-03-10 20:37:42,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 20:37:42,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 20:37:42,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 20:37:42,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 20:37:42,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:37:41" (1/2) ... [2021-03-10 20:37:42,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de1c452 and model type pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 08:37:42, skipping insertion in model container [2021-03-10 20:37:42,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:37:42" (2/2) ... [2021-03-10 20:37:42,090 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread_nondet_loop_bound.bpl [2021-03-10 20:37:42,094 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 20:37:42,094 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 20:37:42,097 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 20:37:42,098 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 20:37:42,136 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,137 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,138 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,139 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,145 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,149 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:37:42,163 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 20:37:42,180 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:37:42,180 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:37:42,180 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:37:42,180 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:37:42,180 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:37:42,180 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:37:42,180 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:37:42,181 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:37:42,188 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 13 transitions, 31 flow [2021-03-10 20:37:42,198 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 42 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:37:42,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:42,204 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-03-10 20:37:42,205 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-10 20:37:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:42,209 INFO L82 PathProgramCache]: Analyzing trace with hash 268777336, now seen corresponding path program 1 times [2021-03-10 20:37:42,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:42,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235759718] [2021-03-10 20:37:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:37:42,272 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:37:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:37:42,279 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:37:42,290 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:37:42,291 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:37:42,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 20:37:42,292 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:37:42,292 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-10 20:37:42,296 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,296 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,297 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,297 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,297 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,298 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,298 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,298 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,299 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,300 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:42,301 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:37:42,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 20:37:42,303 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:37:42,304 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:37:42,304 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:37:42,304 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:37:42,304 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:37:42,304 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:37:42,304 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:37:42,304 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:37:42,305 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 50 flow [2021-03-10 20:37:42,334 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 252 states, 241 states have (on average 2.4937759336099585) internal successors, (601), 251 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 252 states, 241 states have (on average 2.4937759336099585) internal successors, (601), 251 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:37:42,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:42,337 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:42,337 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash 513720736, now seen corresponding path program 1 times [2021-03-10 20:37:42,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:42,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23939135] [2021-03-10 20:37:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:37:42,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23939135] [2021-03-10 20:37:42,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:37:42,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:37:42,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053817008] [2021-03-10 20:37:42,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:37:42,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:37:42,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:37:42,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:37:42,486 INFO L87 Difference]: Start difference. First operand has 252 states, 241 states have (on average 2.4937759336099585) internal successors, (601), 251 states have internal predecessors, (601), 0 states have call successors, (0), 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 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) [2021-03-10 20:37:42,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:37:42,758 INFO L93 Difference]: Finished difference Result 497 states and 1072 transitions. [2021-03-10 20:37:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 20:37:42,760 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 [2021-03-10 20:37:42,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:37:42,782 INFO L225 Difference]: With dead ends: 497 [2021-03-10 20:37:42,782 INFO L226 Difference]: Without dead ends: 403 [2021-03-10 20:37:42,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 20:37:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-03-10 20:37:42,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 261. [2021-03-10 20:37:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 254 states have (on average 2.421259842519685) internal successors, (615), 260 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:42,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 615 transitions. [2021-03-10 20:37:42,849 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 615 transitions. Word has length 7 [2021-03-10 20:37:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:37:42,849 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 615 transitions. [2021-03-10 20:37:42,850 INFO L481 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) [2021-03-10 20:37:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 615 transitions. [2021-03-10 20:37:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 20:37:42,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:42,850 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:42,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 20:37:42,851 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1047128168, now seen corresponding path program 1 times [2021-03-10 20:37:42,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:42,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086540730] [2021-03-10 20:37:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:37:42,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086540730] [2021-03-10 20:37:42,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204624217] [2021-03-10 20:37:42,912 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 [2021-03-10 20:37:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:42,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 20:37:42,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:37:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:37:43,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:37:43,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-03-10 20:37:43,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723783774] [2021-03-10 20:37:43,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 20:37:43,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:37:43,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 20:37:43,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:37:43,173 INFO L87 Difference]: Start difference. First operand 261 states and 615 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:37:43,542 INFO L93 Difference]: Finished difference Result 484 states and 1024 transitions. [2021-03-10 20:37:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 20:37:43,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-03-10 20:37:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:37:43,552 INFO L225 Difference]: With dead ends: 484 [2021-03-10 20:37:43,553 INFO L226 Difference]: Without dead ends: 458 [2021-03-10 20:37:43,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-03-10 20:37:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-03-10 20:37:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 245. [2021-03-10 20:37:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 238 states have (on average 2.3949579831932772) internal successors, (570), 244 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:43,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 570 transitions. [2021-03-10 20:37:43,587 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 570 transitions. Word has length 10 [2021-03-10 20:37:43,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:37:43,587 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 570 transitions. [2021-03-10 20:37:43,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 570 transitions. [2021-03-10 20:37:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 20:37:43,588 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:43,588 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2021-03-10 20:37:43,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 20:37:43,804 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:43,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1047115182, now seen corresponding path program 1 times [2021-03-10 20:37:43,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:43,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268561618] [2021-03-10 20:37:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:37:43,810 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:37:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:37:43,815 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:37:43,816 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:37:43,816 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:37:43,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 20:37:43,817 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:37:43,817 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-10 20:37:43,821 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,821 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,821 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,821 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,822 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,822 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,822 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,822 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,822 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,823 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,823 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,823 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,823 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,824 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,825 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:43,826 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:37:43,826 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-10 20:37:43,827 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:37:43,827 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:37:43,827 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:37:43,827 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:37:43,827 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:37:43,827 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:37:43,827 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:37:43,827 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:37:43,828 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 71 flow [2021-03-10 20:37:43,884 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1512 states, 1489 states have (on average 3.264607118871726) internal successors, (4861), 1511 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 1512 states, 1489 states have (on average 3.264607118871726) internal successors, (4861), 1511 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:37:43,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:43,888 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:43,888 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:43,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:43,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1966221566, now seen corresponding path program 1 times [2021-03-10 20:37:43,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:43,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873579935] [2021-03-10 20:37:43,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:37:43,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873579935] [2021-03-10 20:37:43,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:37:43,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:37:43,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171882219] [2021-03-10 20:37:43,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:37:43,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:37:43,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:37:43,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:37:43,936 INFO L87 Difference]: Start difference. First operand has 1512 states, 1489 states have (on average 3.264607118871726) internal successors, (4861), 1511 states have internal predecessors, (4861), 0 states have call successors, (0), 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 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) [2021-03-10 20:37:44,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:37:44,184 INFO L93 Difference]: Finished difference Result 4185 states and 12022 transitions. [2021-03-10 20:37:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 20:37:44,184 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 [2021-03-10 20:37:44,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:37:44,210 INFO L225 Difference]: With dead ends: 4185 [2021-03-10 20:37:44,210 INFO L226 Difference]: Without dead ends: 3847 [2021-03-10 20:37:44,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 20:37:44,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3847 states. [2021-03-10 20:37:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3847 to 2031. [2021-03-10 20:37:44,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2013 states have (on average 3.1917536015896673) internal successors, (6425), 2030 states have internal predecessors, (6425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 6425 transitions. [2021-03-10 20:37:44,326 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 6425 transitions. Word has length 7 [2021-03-10 20:37:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:37:44,327 INFO L480 AbstractCegarLoop]: Abstraction has 2031 states and 6425 transitions. [2021-03-10 20:37:44,327 INFO L481 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) [2021-03-10 20:37:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 6425 transitions. [2021-03-10 20:37:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 20:37:44,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:44,329 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:44,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 20:37:44,329 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash 408196648, now seen corresponding path program 1 times [2021-03-10 20:37:44,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:44,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715203551] [2021-03-10 20:37:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:37:44,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715203551] [2021-03-10 20:37:44,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993338521] [2021-03-10 20:37:44,385 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 [2021-03-10 20:37:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:44,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 20:37:44,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:37:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:37:44,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:37:44,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-03-10 20:37:44,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278598195] [2021-03-10 20:37:44,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 20:37:44,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:37:44,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 20:37:44,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:37:44,573 INFO L87 Difference]: Start difference. First operand 2031 states and 6425 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:37:45,007 INFO L93 Difference]: Finished difference Result 5643 states and 16060 transitions. [2021-03-10 20:37:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 20:37:45,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-03-10 20:37:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:37:45,036 INFO L225 Difference]: With dead ends: 5643 [2021-03-10 20:37:45,036 INFO L226 Difference]: Without dead ends: 5523 [2021-03-10 20:37:45,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-03-10 20:37:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2021-03-10 20:37:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 2232. [2021-03-10 20:37:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2214 states have (on average 3.194218608852755) internal successors, (7072), 2231 states have internal predecessors, (7072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 7072 transitions. [2021-03-10 20:37:45,158 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 7072 transitions. Word has length 10 [2021-03-10 20:37:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:37:45,158 INFO L480 AbstractCegarLoop]: Abstraction has 2232 states and 7072 transitions. [2021-03-10 20:37:45,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 7072 transitions. [2021-03-10 20:37:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:37:45,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:45,159 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:45,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:37:45,382 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:45,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:45,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1819859788, now seen corresponding path program 1 times [2021-03-10 20:37:45,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:45,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645064011] [2021-03-10 20:37:45,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:37:45,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645064011] [2021-03-10 20:37:45,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721391993] [2021-03-10 20:37:45,434 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 [2021-03-10 20:37:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:45,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:37:45,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:37:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:37:45,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:37:45,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 20:37:45,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80429056] [2021-03-10 20:37:45,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 20:37:45,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:37:45,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 20:37:45,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 20:37:45,607 INFO L87 Difference]: Start difference. First operand 2232 states and 7072 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:37:46,503 INFO L93 Difference]: Finished difference Result 10308 states and 28770 transitions. [2021-03-10 20:37:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 20:37:46,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-03-10 20:37:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:37:46,548 INFO L225 Difference]: With dead ends: 10308 [2021-03-10 20:37:46,548 INFO L226 Difference]: Without dead ends: 10202 [2021-03-10 20:37:46,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 504.4ms TimeCoverageRelationStatistics Valid=561, Invalid=1601, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 20:37:46,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10202 states. [2021-03-10 20:37:46,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10202 to 2356. [2021-03-10 20:37:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2338 states have (on average 3.1971770744225836) internal successors, (7475), 2355 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 7475 transitions. [2021-03-10 20:37:46,708 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 7475 transitions. Word has length 12 [2021-03-10 20:37:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:37:46,708 INFO L480 AbstractCegarLoop]: Abstraction has 2356 states and 7475 transitions. [2021-03-10 20:37:46,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 7475 transitions. [2021-03-10 20:37:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:37:46,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:46,710 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:46,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:37:46,932 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:46,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1434960332, now seen corresponding path program 2 times [2021-03-10 20:37:46,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:46,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061493672] [2021-03-10 20:37:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:37:46,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061493672] [2021-03-10 20:37:46,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275424554] [2021-03-10 20:37:46,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 20:37:47,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 20:37:47,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:37:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:37:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:37:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:37:47,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:37:47,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 20:37:47,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371683058] [2021-03-10 20:37:47,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 20:37:47,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:37:47,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 20:37:47,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 20:37:47,169 INFO L87 Difference]: Start difference. First operand 2356 states and 7475 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:37:48,423 INFO L93 Difference]: Finished difference Result 12289 states and 34176 transitions. [2021-03-10 20:37:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 20:37:48,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-03-10 20:37:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:37:48,458 INFO L225 Difference]: With dead ends: 12289 [2021-03-10 20:37:48,459 INFO L226 Difference]: Without dead ends: 12109 [2021-03-10 20:37:48,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 655.4ms TimeCoverageRelationStatistics Valid=883, Invalid=2657, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 20:37:48,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12109 states. [2021-03-10 20:37:48,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12109 to 2303. [2021-03-10 20:37:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2285 states have (on average 3.177242888402626) internal successors, (7260), 2302 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 7260 transitions. [2021-03-10 20:37:48,660 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 7260 transitions. Word has length 12 [2021-03-10 20:37:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:37:48,660 INFO L480 AbstractCegarLoop]: Abstraction has 2303 states and 7260 transitions. [2021-03-10 20:37:48,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 7260 transitions. [2021-03-10 20:37:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:37:48,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:48,661 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:48,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:37:48,875 INFO L428 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:48,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:48,876 INFO L82 PathProgramCache]: Analyzing trace with hash 35510376, now seen corresponding path program 3 times [2021-03-10 20:37:48,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:48,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134700160] [2021-03-10 20:37:48,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:37:48,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134700160] [2021-03-10 20:37:48,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231373629] [2021-03-10 20:37:48,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:37:48,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 20:37:48,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:37:48,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:37:48,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:37:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:37:49,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:37:49,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 20:37:49,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442281000] [2021-03-10 20:37:49,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 20:37:49,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:37:49,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 20:37:49,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 20:37:49,084 INFO L87 Difference]: Start difference. First operand 2303 states and 7260 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:37:50,016 INFO L93 Difference]: Finished difference Result 9043 states and 24899 transitions. [2021-03-10 20:37:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 20:37:50,017 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-03-10 20:37:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:37:50,042 INFO L225 Difference]: With dead ends: 9043 [2021-03-10 20:37:50,042 INFO L226 Difference]: Without dead ends: 8949 [2021-03-10 20:37:50,043 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 563.4ms TimeCoverageRelationStatistics Valid=667, Invalid=1985, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 20:37:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8949 states. [2021-03-10 20:37:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8949 to 2272. [2021-03-10 20:37:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2254 states have (on average 3.170807453416149) internal successors, (7147), 2271 states have internal predecessors, (7147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 7147 transitions. [2021-03-10 20:37:50,192 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 7147 transitions. Word has length 12 [2021-03-10 20:37:50,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:37:50,192 INFO L480 AbstractCegarLoop]: Abstraction has 2272 states and 7147 transitions. [2021-03-10 20:37:50,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:50,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 7147 transitions. [2021-03-10 20:37:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:37:50,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:50,194 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:50,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:37:50,410 INFO L428 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:50,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:50,410 INFO L82 PathProgramCache]: Analyzing trace with hash -825742738, now seen corresponding path program 4 times [2021-03-10 20:37:50,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:50,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440938193] [2021-03-10 20:37:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:37:50,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440938193] [2021-03-10 20:37:50,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82993147] [2021-03-10 20:37:50,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:37:50,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 20:37:50,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:37:50,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:37:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:37:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:37:50,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:37:50,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 20:37:50,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279966857] [2021-03-10 20:37:50,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 20:37:50,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:37:50,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 20:37:50,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 20:37:50,598 INFO L87 Difference]: Start difference. First operand 2272 states and 7147 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:37:51,855 INFO L93 Difference]: Finished difference Result 10689 states and 29224 transitions. [2021-03-10 20:37:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 20:37:51,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-03-10 20:37:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:37:51,893 INFO L225 Difference]: With dead ends: 10689 [2021-03-10 20:37:51,893 INFO L226 Difference]: Without dead ends: 10597 [2021-03-10 20:37:51,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 744.1ms TimeCoverageRelationStatistics Valid=1000, Invalid=3160, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 20:37:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10597 states. [2021-03-10 20:37:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10597 to 1994. [2021-03-10 20:37:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1979 states have (on average 3.1773623041940375) internal successors, (6288), 1993 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6288 transitions. [2021-03-10 20:37:52,024 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6288 transitions. Word has length 12 [2021-03-10 20:37:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:37:52,025 INFO L480 AbstractCegarLoop]: Abstraction has 1994 states and 6288 transitions. [2021-03-10 20:37:52,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6288 transitions. [2021-03-10 20:37:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 20:37:52,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:52,025 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:52,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:37:52,239 INFO L428 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:52,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:52,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1147361507, now seen corresponding path program 1 times [2021-03-10 20:37:52,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:52,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495357232] [2021-03-10 20:37:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:37:52,244 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:37:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:37:52,246 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:37:52,247 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:37:52,247 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:37:52,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 20:37:52,248 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:37:52,248 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-10 20:37:52,254 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,254 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,255 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,255 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,255 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,255 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,255 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,255 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,256 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,256 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,256 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,256 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,256 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,256 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,256 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,256 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,257 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,258 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,259 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,259 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:37:52,260 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:37:52,260 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-10 20:37:52,261 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:37:52,261 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:37:52,261 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:37:52,261 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:37:52,262 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:37:52,262 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:37:52,262 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:37:52,262 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:37:52,264 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 31 transitions, 94 flow [2021-03-10 20:37:52,963 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9072 states, 9025 states have (on average 4.068808864265928) internal successors, (36721), 9071 states have internal predecessors, (36721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 9072 states, 9025 states have (on average 4.068808864265928) internal successors, (36721), 9071 states have internal predecessors, (36721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:37:52,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:52,989 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:52,990 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:52,990 INFO L82 PathProgramCache]: Analyzing trace with hash 331295731, now seen corresponding path program 1 times [2021-03-10 20:37:52,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:52,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904753425] [2021-03-10 20:37:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:37:53,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904753425] [2021-03-10 20:37:53,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:37:53,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:37:53,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884176585] [2021-03-10 20:37:53,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:37:53,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:37:53,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:37:53,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:37:53,055 INFO L87 Difference]: Start difference. First operand has 9072 states, 9025 states have (on average 4.068808864265928) internal successors, (36721), 9071 states have internal predecessors, (36721), 0 states have call successors, (0), 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 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) [2021-03-10 20:37:53,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:37:53,408 INFO L93 Difference]: Finished difference Result 29977 states and 108006 transitions. [2021-03-10 20:37:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 20:37:53,409 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 [2021-03-10 20:37:53,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:37:53,503 INFO L225 Difference]: With dead ends: 29977 [2021-03-10 20:37:53,503 INFO L226 Difference]: Without dead ends: 28891 [2021-03-10 20:37:53,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 20:37:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28891 states. [2021-03-10 20:37:54,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28891 to 14115. [2021-03-10 20:37:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14115 states, 14074 states have (on average 3.9532471223532757) internal successors, (55638), 14114 states have internal predecessors, (55638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14115 states to 14115 states and 55638 transitions. [2021-03-10 20:37:54,611 INFO L78 Accepts]: Start accepts. Automaton has 14115 states and 55638 transitions. Word has length 7 [2021-03-10 20:37:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:37:54,611 INFO L480 AbstractCegarLoop]: Abstraction has 14115 states and 55638 transitions. [2021-03-10 20:37:54,611 INFO L481 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) [2021-03-10 20:37:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 14115 states and 55638 transitions. [2021-03-10 20:37:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 20:37:54,611 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:54,611 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:54,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-10 20:37:54,612 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:54,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:54,625 INFO L82 PathProgramCache]: Analyzing trace with hash -590120179, now seen corresponding path program 1 times [2021-03-10 20:37:54,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:54,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662164711] [2021-03-10 20:37:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:37:54,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662164711] [2021-03-10 20:37:54,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262984336] [2021-03-10 20:37:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:37:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:54,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 20:37:54,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:37:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:37:54,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:37:54,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-03-10 20:37:54,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774999973] [2021-03-10 20:37:54,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 20:37:54,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:37:54,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 20:37:54,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:37:54,829 INFO L87 Difference]: Start difference. First operand 14115 states and 55638 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:37:55,346 INFO L93 Difference]: Finished difference Result 44845 states and 160671 transitions. [2021-03-10 20:37:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 20:37:55,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-03-10 20:37:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:37:55,468 INFO L225 Difference]: With dead ends: 44845 [2021-03-10 20:37:55,468 INFO L226 Difference]: Without dead ends: 44427 [2021-03-10 20:37:55,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-03-10 20:37:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44427 states. [2021-03-10 20:37:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44427 to 16232. [2021-03-10 20:37:56,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16232 states, 16191 states have (on average 3.9700450867766044) internal successors, (64279), 16231 states have internal predecessors, (64279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16232 states to 16232 states and 64279 transitions. [2021-03-10 20:37:56,522 INFO L78 Accepts]: Start accepts. Automaton has 16232 states and 64279 transitions. Word has length 10 [2021-03-10 20:37:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:37:56,523 INFO L480 AbstractCegarLoop]: Abstraction has 16232 states and 64279 transitions. [2021-03-10 20:37:56,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:56,523 INFO L276 IsEmpty]: Start isEmpty. Operand 16232 states and 64279 transitions. [2021-03-10 20:37:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:37:56,523 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:56,523 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:56,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:37:56,747 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1450030414, now seen corresponding path program 1 times [2021-03-10 20:37:56,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:56,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55096745] [2021-03-10 20:37:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:37:56,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55096745] [2021-03-10 20:37:56,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477502812] [2021-03-10 20:37:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:37:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:56,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:37:56,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:37:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:37:56,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:37:56,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 20:37:56,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862530810] [2021-03-10 20:37:56,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 20:37:56,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:37:56,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 20:37:56,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 20:37:56,985 INFO L87 Difference]: Start difference. First operand 16232 states and 64279 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:37:59,037 INFO L93 Difference]: Finished difference Result 101988 states and 352819 transitions. [2021-03-10 20:37:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 20:37:59,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-03-10 20:37:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:37:59,574 INFO L225 Difference]: With dead ends: 101988 [2021-03-10 20:37:59,575 INFO L226 Difference]: Without dead ends: 101682 [2021-03-10 20:37:59,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 754.0ms TimeCoverageRelationStatistics Valid=1000, Invalid=3160, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 20:38:00,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101682 states. [2021-03-10 20:38:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101682 to 17739. [2021-03-10 20:38:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17739 states, 17698 states have (on average 4.020906317097977) internal successors, (71162), 17738 states have internal predecessors, (71162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17739 states to 17739 states and 71162 transitions. [2021-03-10 20:38:01,157 INFO L78 Accepts]: Start accepts. Automaton has 17739 states and 71162 transitions. Word has length 12 [2021-03-10 20:38:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:38:01,157 INFO L480 AbstractCegarLoop]: Abstraction has 17739 states and 71162 transitions. [2021-03-10 20:38:01,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:01,158 INFO L276 IsEmpty]: Start isEmpty. Operand 17739 states and 71162 transitions. [2021-03-10 20:38:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:38:01,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:38:01,158 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:38:01,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 20:38:01,365 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:38:01,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:38:01,365 INFO L82 PathProgramCache]: Analyzing trace with hash -169812180, now seen corresponding path program 2 times [2021-03-10 20:38:01,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:38:01,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000120573] [2021-03-10 20:38:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:38:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:38:01,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000120573] [2021-03-10 20:38:01,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356975389] [2021-03-10 20:38:01,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 20:38:01,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 20:38:01,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:38:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:38:01,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:38:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:38:01,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:38:01,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 20:38:01,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472685062] [2021-03-10 20:38:01,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 20:38:01,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:38:01,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 20:38:01,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 20:38:01,586 INFO L87 Difference]: Start difference. First operand 17739 states and 71162 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:38:03,573 INFO L93 Difference]: Finished difference Result 108176 states and 379320 transitions. [2021-03-10 20:38:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 20:38:03,584 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-03-10 20:38:03,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:38:03,918 INFO L225 Difference]: With dead ends: 108176 [2021-03-10 20:38:03,918 INFO L226 Difference]: Without dead ends: 107568 [2021-03-10 20:38:03,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 575.3ms TimeCoverageRelationStatistics Valid=883, Invalid=2657, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 20:38:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107568 states. [2021-03-10 20:38:05,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107568 to 16516. [2021-03-10 20:38:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16516 states, 16478 states have (on average 3.9538172108265566) internal successors, (65151), 16515 states have internal predecessors, (65151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16516 states to 16516 states and 65151 transitions. [2021-03-10 20:38:05,434 INFO L78 Accepts]: Start accepts. Automaton has 16516 states and 65151 transitions. Word has length 12 [2021-03-10 20:38:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:38:05,434 INFO L480 AbstractCegarLoop]: Abstraction has 16516 states and 65151 transitions. [2021-03-10 20:38:05,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 16516 states and 65151 transitions. [2021-03-10 20:38:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 20:38:05,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:38:05,435 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:38:05,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 20:38:05,635 INFO L428 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:38:05,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:38:05,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1503398707, now seen corresponding path program 1 times [2021-03-10 20:38:05,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:38:05,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861080542] [2021-03-10 20:38:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:38:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 20:38:05,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861080542] [2021-03-10 20:38:05,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679842028] [2021-03-10 20:38:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:38:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:05,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 20:38:05,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:38:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:38:05,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:38:05,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-03-10 20:38:05,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098199077] [2021-03-10 20:38:05,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 20:38:05,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:38:05,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 20:38:05,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 20:38:05,778 INFO L87 Difference]: Start difference. First operand 16516 states and 65151 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:06,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:38:06,511 INFO L93 Difference]: Finished difference Result 51303 states and 185776 transitions. [2021-03-10 20:38:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 20:38:06,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 13 [2021-03-10 20:38:06,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:38:06,658 INFO L225 Difference]: With dead ends: 51303 [2021-03-10 20:38:06,658 INFO L226 Difference]: Without dead ends: 50767 [2021-03-10 20:38:06,659 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2021-03-10 20:38:06,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50767 states. [2021-03-10 20:38:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50767 to 18338. [2021-03-10 20:38:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18338 states, 18300 states have (on average 3.969672131147541) internal successors, (72645), 18337 states have internal predecessors, (72645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18338 states to 18338 states and 72645 transitions. [2021-03-10 20:38:07,614 INFO L78 Accepts]: Start accepts. Automaton has 18338 states and 72645 transitions. Word has length 13 [2021-03-10 20:38:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:38:07,615 INFO L480 AbstractCegarLoop]: Abstraction has 18338 states and 72645 transitions. [2021-03-10 20:38:07,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 18338 states and 72645 transitions. [2021-03-10 20:38:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 20:38:07,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:38:07,616 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:38:07,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 20:38:07,838 INFO L428 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:38:07,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:38:07,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1459288340, now seen corresponding path program 1 times [2021-03-10 20:38:07,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:38:07,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492271147] [2021-03-10 20:38:07,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:38:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 20:38:07,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492271147] [2021-03-10 20:38:07,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467061468] [2021-03-10 20:38:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 20:38:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:07,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 20:38:07,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:38:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:38:08,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:38:08,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-03-10 20:38:08,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937352364] [2021-03-10 20:38:08,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 20:38:08,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:38:08,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 20:38:08,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-10 20:38:08,067 INFO L87 Difference]: Start difference. First operand 18338 states and 72645 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:38:09,825 INFO L93 Difference]: Finished difference Result 91160 states and 331217 transitions. [2021-03-10 20:38:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 20:38:09,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 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 15 [2021-03-10 20:38:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:38:10,367 INFO L225 Difference]: With dead ends: 91160 [2021-03-10 20:38:10,368 INFO L226 Difference]: Without dead ends: 90874 [2021-03-10 20:38:10,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 924.3ms TimeCoverageRelationStatistics Valid=823, Invalid=2717, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 20:38:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90874 states. [2021-03-10 20:38:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90874 to 19300. [2021-03-10 20:38:11,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19300 states, 19262 states have (on average 4.003737929602326) internal successors, (77120), 19299 states have internal predecessors, (77120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:11,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19300 states to 19300 states and 77120 transitions. [2021-03-10 20:38:11,709 INFO L78 Accepts]: Start accepts. Automaton has 19300 states and 77120 transitions. Word has length 15 [2021-03-10 20:38:11,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:38:11,710 INFO L480 AbstractCegarLoop]: Abstraction has 19300 states and 77120 transitions. [2021-03-10 20:38:11,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand 19300 states and 77120 transitions. [2021-03-10 20:38:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 20:38:11,711 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:38:11,711 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:38:11,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 20:38:11,917 INFO L428 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:38:11,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:38:11,918 INFO L82 PathProgramCache]: Analyzing trace with hash 210295032, now seen corresponding path program 1 times [2021-03-10 20:38:11,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:38:11,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406224795] [2021-03-10 20:38:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:38:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 20:38:11,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406224795] [2021-03-10 20:38:11,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466708967] [2021-03-10 20:38:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:38:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:11,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 20:38:11,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:38:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:38:12,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:38:12,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-03-10 20:38:12,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719910837] [2021-03-10 20:38:12,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 20:38:12,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:38:12,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 20:38:12,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-03-10 20:38:12,121 INFO L87 Difference]: Start difference. First operand 19300 states and 77120 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:38:13,780 INFO L93 Difference]: Finished difference Result 95001 states and 347884 transitions. [2021-03-10 20:38:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 20:38:13,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 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 15 [2021-03-10 20:38:13,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:38:14,035 INFO L225 Difference]: With dead ends: 95001 [2021-03-10 20:38:14,035 INFO L226 Difference]: Without dead ends: 94661 [2021-03-10 20:38:14,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 533.6ms TimeCoverageRelationStatistics Valid=625, Invalid=2027, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 20:38:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94661 states. [2021-03-10 20:38:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94661 to 20612. [2021-03-10 20:38:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20612 states, 20574 states have (on average 4.044619422572178) internal successors, (83214), 20611 states have internal predecessors, (83214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20612 states to 20612 states and 83214 transitions. [2021-03-10 20:38:15,607 INFO L78 Accepts]: Start accepts. Automaton has 20612 states and 83214 transitions. Word has length 15 [2021-03-10 20:38:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:38:15,607 INFO L480 AbstractCegarLoop]: Abstraction has 20612 states and 83214 transitions. [2021-03-10 20:38:15,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 20612 states and 83214 transitions. [2021-03-10 20:38:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 20:38:15,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:38:15,608 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:38:15,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 20:38:15,809 INFO L428 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:38:15,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:38:15,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1657134634, now seen corresponding path program 2 times [2021-03-10 20:38:15,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:38:15,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44477025] [2021-03-10 20:38:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:38:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:38:15,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44477025] [2021-03-10 20:38:15,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639808373] [2021-03-10 20:38:15,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:38:15,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 20:38:15,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:38:15,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:38:15,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:38:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:38:16,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:38:16,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-03-10 20:38:16,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382633151] [2021-03-10 20:38:16,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 20:38:16,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:38:16,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 20:38:16,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 20:38:16,015 INFO L87 Difference]: Start difference. First operand 20612 states and 83214 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:38:17,491 INFO L93 Difference]: Finished difference Result 72828 states and 270057 transitions. [2021-03-10 20:38:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 20:38:17,492 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 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 15 [2021-03-10 20:38:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:38:17,698 INFO L225 Difference]: With dead ends: 72828 [2021-03-10 20:38:17,698 INFO L226 Difference]: Without dead ends: 72206 [2021-03-10 20:38:17,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 480.0ms TimeCoverageRelationStatistics Valid=513, Invalid=1467, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 20:38:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72206 states. [2021-03-10 20:38:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72206 to 19478. [2021-03-10 20:38:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19478 states, 19440 states have (on average 3.9830246913580245) internal successors, (77430), 19477 states have internal predecessors, (77430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19478 states to 19478 states and 77430 transitions. [2021-03-10 20:38:18,888 INFO L78 Accepts]: Start accepts. Automaton has 19478 states and 77430 transitions. Word has length 15 [2021-03-10 20:38:18,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:38:18,888 INFO L480 AbstractCegarLoop]: Abstraction has 19478 states and 77430 transitions. [2021-03-10 20:38:18,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 19478 states and 77430 transitions. [2021-03-10 20:38:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 20:38:18,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:38:18,890 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:38:19,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:38:19,098 INFO L428 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:38:19,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:38:19,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1657139604, now seen corresponding path program 2 times [2021-03-10 20:38:19,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:38:19,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377296190] [2021-03-10 20:38:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:38:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:38:19,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377296190] [2021-03-10 20:38:19,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274268413] [2021-03-10 20:38:19,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:38:19,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 20:38:19,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:38:19,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:38:19,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:38:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:38:19,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:38:19,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-03-10 20:38:19,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158848516] [2021-03-10 20:38:19,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 20:38:19,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:38:19,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 20:38:19,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 20:38:19,285 INFO L87 Difference]: Start difference. First operand 19478 states and 77430 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:20,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:38:20,725 INFO L93 Difference]: Finished difference Result 75366 states and 279770 transitions. [2021-03-10 20:38:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 20:38:20,725 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 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 15 [2021-03-10 20:38:20,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:38:20,931 INFO L225 Difference]: With dead ends: 75366 [2021-03-10 20:38:20,931 INFO L226 Difference]: Without dead ends: 74676 [2021-03-10 20:38:20,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 440.5ms TimeCoverageRelationStatistics Valid=513, Invalid=1467, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 20:38:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74676 states. [2021-03-10 20:38:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74676 to 18360. [2021-03-10 20:38:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18360 states, 18322 states have (on average 3.9326492740967143) internal successors, (72054), 18359 states have internal predecessors, (72054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18360 states to 18360 states and 72054 transitions. [2021-03-10 20:38:22,045 INFO L78 Accepts]: Start accepts. Automaton has 18360 states and 72054 transitions. Word has length 15 [2021-03-10 20:38:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:38:22,045 INFO L480 AbstractCegarLoop]: Abstraction has 18360 states and 72054 transitions. [2021-03-10 20:38:22,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 18360 states and 72054 transitions. [2021-03-10 20:38:22,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 20:38:22,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:38:22,047 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:38:22,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:38:22,248 INFO L428 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:38:22,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:38:22,248 INFO L82 PathProgramCache]: Analyzing trace with hash -70336879, now seen corresponding path program 1 times [2021-03-10 20:38:22,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:38:22,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987536551] [2021-03-10 20:38:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:38:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-03-10 20:38:22,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987536551] [2021-03-10 20:38:22,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108120183] [2021-03-10 20:38:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:38:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:22,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:38:22,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:38:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:38:22,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:38:22,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2021-03-10 20:38:22,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661575588] [2021-03-10 20:38:22,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 20:38:22,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:38:22,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 20:38:22,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-10 20:38:22,657 INFO L87 Difference]: Start difference. First operand 18360 states and 72054 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:38:23,303 INFO L93 Difference]: Finished difference Result 53793 states and 197463 transitions. [2021-03-10 20:38:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 20:38:23,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 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 16 [2021-03-10 20:38:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:38:23,455 INFO L225 Difference]: With dead ends: 53793 [2021-03-10 20:38:23,455 INFO L226 Difference]: Without dead ends: 53239 [2021-03-10 20:38:23,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2021-03-10 20:38:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53239 states. [2021-03-10 20:38:24,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53239 to 19292. [2021-03-10 20:38:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19292 states, 19254 states have (on average 3.9399085904227693) internal successors, (75859), 19291 states have internal predecessors, (75859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19292 states to 19292 states and 75859 transitions. [2021-03-10 20:38:24,412 INFO L78 Accepts]: Start accepts. Automaton has 19292 states and 75859 transitions. Word has length 16 [2021-03-10 20:38:24,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:38:24,412 INFO L480 AbstractCegarLoop]: Abstraction has 19292 states and 75859 transitions. [2021-03-10 20:38:24,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 19292 states and 75859 transitions. [2021-03-10 20:38:24,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 20:38:24,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:38:24,414 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:38:24,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 20:38:24,619 INFO L428 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:38:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:38:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash -70359785, now seen corresponding path program 1 times [2021-03-10 20:38:24,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:38:24,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490533843] [2021-03-10 20:38:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:38:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:38:24,623 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:38:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:38:24,625 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:38:24,627 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:38:24,627 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:38:24,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-03-10 20:38:24,627 WARN L342 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:38:24,627 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-03-10 20:38:24,637 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,637 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,637 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,638 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,638 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,638 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,638 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,638 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,638 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,638 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,638 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,638 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,639 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,639 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,639 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,639 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,639 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,639 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,639 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,639 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,640 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,641 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,642 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,642 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,643 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:38:24,644 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:38:24,644 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-03-10 20:38:24,644 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:38:24,644 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:38:24,644 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:38:24,645 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:38:24,645 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:38:24,645 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:38:24,645 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:38:24,645 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:38:24,646 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 37 transitions, 119 flow [2021-03-10 20:38:38,515 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54432 states, 54337 states have (on average 4.889504389274343) internal successors, (265681), 54431 states have internal predecessors, (265681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:38,585 INFO L276 IsEmpty]: Start isEmpty. Operand has 54432 states, 54337 states have (on average 4.889504389274343) internal successors, (265681), 54431 states have internal predecessors, (265681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:38,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:38:38,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:38:38,586 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:38:38,586 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:38:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:38:38,586 INFO L82 PathProgramCache]: Analyzing trace with hash -96074578, now seen corresponding path program 1 times [2021-03-10 20:38:38,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:38:38,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642011415] [2021-03-10 20:38:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:38:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:38:38,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642011415] [2021-03-10 20:38:38,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:38:38,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:38:38,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858270684] [2021-03-10 20:38:38,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:38:38,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:38:38,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:38:38,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:38:38,702 INFO L87 Difference]: Start difference. First operand has 54432 states, 54337 states have (on average 4.889504389274343) internal successors, (265681), 54431 states have internal predecessors, (265681), 0 states have call successors, (0), 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 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) [2021-03-10 20:38:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:38:40,274 INFO L93 Difference]: Finished difference Result 198697 states and 862114 transitions. [2021-03-10 20:38:40,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 20:38:40,275 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 [2021-03-10 20:38:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:38:41,527 INFO L225 Difference]: With dead ends: 198697 [2021-03-10 20:38:41,527 INFO L226 Difference]: Without dead ends: 195351 [2021-03-10 20:38:41,527 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 20:38:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195351 states. [2021-03-10 20:38:47,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195351 to 93243. [2021-03-10 20:38:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93243 states, 93155 states have (on average 4.706016853631045) internal successors, (438389), 93242 states have internal predecessors, (438389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93243 states to 93243 states and 438389 transitions. [2021-03-10 20:38:47,975 INFO L78 Accepts]: Start accepts. Automaton has 93243 states and 438389 transitions. Word has length 7 [2021-03-10 20:38:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:38:47,976 INFO L480 AbstractCegarLoop]: Abstraction has 93243 states and 438389 transitions. [2021-03-10 20:38:47,976 INFO L481 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) [2021-03-10 20:38:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 93243 states and 438389 transitions. [2021-03-10 20:38:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 20:38:47,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:38:47,976 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:38:47,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-03-10 20:38:47,976 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:38:47,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:38:47,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1947837208, now seen corresponding path program 1 times [2021-03-10 20:38:47,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:38:47,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510819915] [2021-03-10 20:38:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:38:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:38:48,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510819915] [2021-03-10 20:38:48,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166555003] [2021-03-10 20:38:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:38:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:38:48,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 20:38:48,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:38:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:38:48,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:38:48,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-03-10 20:38:48,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436087228] [2021-03-10 20:38:48,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 20:38:48,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:38:48,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 20:38:48,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:38:48,105 INFO L87 Difference]: Start difference. First operand 93243 states and 438389 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:38:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:38:51,517 INFO L93 Difference]: Finished difference Result 307965 states and 1328623 transitions. [2021-03-10 20:38:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 20:38:51,517 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-03-10 20:38:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:38:53,456 INFO L225 Difference]: With dead ends: 307965 [2021-03-10 20:38:53,457 INFO L226 Difference]: Without dead ends: 306637 [2021-03-10 20:38:53,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-03-10 20:38:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306637 states. [2021-03-10 20:39:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306637 to 108474. [2021-03-10 20:39:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108474 states, 108386 states have (on average 4.731339840938866) internal successors, (512811), 108473 states have internal predecessors, (512811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:39:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108474 states to 108474 states and 512811 transitions. [2021-03-10 20:39:02,819 INFO L78 Accepts]: Start accepts. Automaton has 108474 states and 512811 transitions. Word has length 10 [2021-03-10 20:39:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:39:02,819 INFO L480 AbstractCegarLoop]: Abstraction has 108474 states and 512811 transitions. [2021-03-10 20:39:02,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:39:02,819 INFO L276 IsEmpty]: Start isEmpty. Operand 108474 states and 512811 transitions. [2021-03-10 20:39:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:39:02,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:39:02,820 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:39:03,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:39:03,020 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:39:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:39:03,021 INFO L82 PathProgramCache]: Analyzing trace with hash 734181959, now seen corresponding path program 1 times [2021-03-10 20:39:03,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:39:03,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854925365] [2021-03-10 20:39:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:39:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:39:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:39:03,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854925365] [2021-03-10 20:39:03,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883524694] [2021-03-10 20:39:03,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:39:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:39:03,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:39:03,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:39:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:39:03,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:39:03,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 20:39:03,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846111696] [2021-03-10 20:39:03,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 20:39:03,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:39:03,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 20:39:03,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 20:39:03,189 INFO L87 Difference]: Start difference. First operand 108474 states and 512811 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:39:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:39:10,406 INFO L93 Difference]: Finished difference Result 725636 states and 3060802 transitions. [2021-03-10 20:39:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 20:39:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-03-10 20:39:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:39:14,112 INFO L225 Difference]: With dead ends: 725636 [2021-03-10 20:39:14,112 INFO L226 Difference]: Without dead ends: 723738 [2021-03-10 20:39:14,113 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=883, Invalid=2657, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 20:39:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723738 states. [2021-03-10 20:39:30,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723738 to 111695. [2021-03-10 20:39:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111695 states, 111607 states have (on average 4.715394195704571) internal successors, (526271), 111694 states have internal predecessors, (526271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:39:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111695 states to 111695 states and 526271 transitions. [2021-03-10 20:39:31,518 INFO L78 Accepts]: Start accepts. Automaton has 111695 states and 526271 transitions. Word has length 12 [2021-03-10 20:39:31,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:39:31,518 INFO L480 AbstractCegarLoop]: Abstraction has 111695 states and 526271 transitions. [2021-03-10 20:39:31,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:39:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 111695 states and 526271 transitions. [2021-03-10 20:39:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:39:31,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:39:31,519 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:39:31,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 20:39:31,730 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:39:31,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:39:31,731 INFO L82 PathProgramCache]: Analyzing trace with hash 729420359, now seen corresponding path program 2 times [2021-03-10 20:39:31,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:39:31,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423252775] [2021-03-10 20:39:31,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:39:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:39:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:39:31,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423252775] [2021-03-10 20:39:31,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527265599] [2021-03-10 20:39:31,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:39:31,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 20:39:31,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:39:31,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:39:31,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:39:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:39:32,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:39:32,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 20:39:32,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426896024] [2021-03-10 20:39:32,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 20:39:32,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:39:32,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 20:39:32,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 20:39:32,834 INFO L87 Difference]: Start difference. First operand 111695 states and 526271 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:39:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:39:39,552 INFO L93 Difference]: Finished difference Result 575859 states and 2442615 transitions. [2021-03-10 20:39:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 20:39:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-03-10 20:39:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:39:43,431 INFO L225 Difference]: With dead ends: 575859 [2021-03-10 20:39:43,431 INFO L226 Difference]: Without dead ends: 573959 [2021-03-10 20:39:43,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1425.3ms TimeCoverageRelationStatistics Valid=538, Invalid=1532, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 20:39:50,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573959 states. [2021-03-10 20:39:57,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573959 to 117843. [2021-03-10 20:39:57,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117843 states, 117755 states have (on average 4.7105091078935075) internal successors, (554686), 117842 states have internal predecessors, (554686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:39:58,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117843 states to 117843 states and 554686 transitions. [2021-03-10 20:39:58,250 INFO L78 Accepts]: Start accepts. Automaton has 117843 states and 554686 transitions. Word has length 12 [2021-03-10 20:39:58,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:39:58,250 INFO L480 AbstractCegarLoop]: Abstraction has 117843 states and 554686 transitions. [2021-03-10 20:39:58,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:39:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 117843 states and 554686 transitions. [2021-03-10 20:39:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:39:58,251 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:39:58,251 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:39:58,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 20:39:58,451 INFO L428 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:39:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:39:58,452 INFO L82 PathProgramCache]: Analyzing trace with hash -19820943, now seen corresponding path program 3 times [2021-03-10 20:39:58,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:39:58,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782743094] [2021-03-10 20:39:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:39:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:39:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:39:58,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782743094] [2021-03-10 20:39:58,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420388234] [2021-03-10 20:39:58,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:39:58,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 20:39:58,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:39:58,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:39:58,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:39:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:39:58,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:39:58,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 20:39:58,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376904116] [2021-03-10 20:39:58,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 20:39:58,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:39:58,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 20:39:58,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 20:39:58,671 INFO L87 Difference]: Start difference. First operand 117843 states and 554686 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:40:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:40:05,701 INFO L93 Difference]: Finished difference Result 662451 states and 2803266 transitions. [2021-03-10 20:40:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 20:40:05,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-03-10 20:40:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:40:09,329 INFO L225 Difference]: With dead ends: 662451 [2021-03-10 20:40:09,330 INFO L226 Difference]: Without dead ends: 659605 [2021-03-10 20:40:09,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 547.0ms TimeCoverageRelationStatistics Valid=743, Invalid=2119, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 20:40:16,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659605 states. [2021-03-10 20:40:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659605 to 117847. [2021-03-10 20:40:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117847 states, 117759 states have (on average 4.7104085462682255) internal successors, (554693), 117846 states have internal predecessors, (554693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:40:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117847 states to 117847 states and 554693 transitions. [2021-03-10 20:40:26,259 INFO L78 Accepts]: Start accepts. Automaton has 117847 states and 554693 transitions. Word has length 12 [2021-03-10 20:40:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:40:26,270 INFO L480 AbstractCegarLoop]: Abstraction has 117847 states and 554693 transitions. [2021-03-10 20:40:26,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:40:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 117847 states and 554693 transitions. [2021-03-10 20:40:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:40:26,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:40:26,275 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:40:26,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 20:40:26,495 INFO L428 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:40:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:40:26,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1767302303, now seen corresponding path program 4 times [2021-03-10 20:40:26,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:40:26,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774113385] [2021-03-10 20:40:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:40:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:40:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:40:26,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774113385] [2021-03-10 20:40:26,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578356479] [2021-03-10 20:40:26,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:40:26,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 20:40:26,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:40:26,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:40:26,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:40:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:40:26,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:40:26,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 20:40:26,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285250309] [2021-03-10 20:40:26,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 20:40:26,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:40:26,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 20:40:26,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 20:40:26,651 INFO L87 Difference]: Start difference. First operand 117847 states and 554693 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:40:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:40:36,836 INFO L93 Difference]: Finished difference Result 1013229 states and 4307014 transitions. [2021-03-10 20:40:36,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 20:40:36,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-03-10 20:40:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:40:44,061 INFO L225 Difference]: With dead ends: 1013229 [2021-03-10 20:40:44,061 INFO L226 Difference]: Without dead ends: 1010863 [2021-03-10 20:40:44,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 664.9ms TimeCoverageRelationStatistics Valid=1164, Invalid=3126, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 20:40:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010863 states. [2021-03-10 20:41:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010863 to 115584. [2021-03-10 20:41:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115584 states, 115496 states have (on average 4.702604419200665) internal successors, (543132), 115583 states have internal predecessors, (543132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115584 states to 115584 states and 543132 transitions. [2021-03-10 20:41:12,399 INFO L78 Accepts]: Start accepts. Automaton has 115584 states and 543132 transitions. Word has length 12 [2021-03-10 20:41:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:12,399 INFO L480 AbstractCegarLoop]: Abstraction has 115584 states and 543132 transitions. [2021-03-10 20:41:12,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 115584 states and 543132 transitions. [2021-03-10 20:41:12,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 20:41:12,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:12,399 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:12,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 20:41:12,600 INFO L428 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:12,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:12,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1949126121, now seen corresponding path program 5 times [2021-03-10 20:41:12,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:12,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432844007] [2021-03-10 20:41:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:41:12,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432844007] [2021-03-10 20:41:12,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784474604] [2021-03-10 20:41:12,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:41:12,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 20:41:12,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:41:12,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:41:12,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:41:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:12,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:41:12,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 20:41:12,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451539708] [2021-03-10 20:41:12,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 20:41:12,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:12,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 20:41:12,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 20:41:12,761 INFO L87 Difference]: Start difference. First operand 115584 states and 543132 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:20,278 INFO L93 Difference]: Finished difference Result 754723 states and 3162332 transitions. [2021-03-10 20:41:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 20:41:20,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-03-10 20:41:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:24,073 INFO L225 Difference]: With dead ends: 754723 [2021-03-10 20:41:24,073 INFO L226 Difference]: Without dead ends: 753775 [2021-03-10 20:41:24,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 631.1ms TimeCoverageRelationStatistics Valid=1000, Invalid=3160, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 20:41:32,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753775 states. [2021-03-10 20:41:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753775 to 114250. [2021-03-10 20:41:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114250 states, 114165 states have (on average 4.701537248718959) internal successors, (536751), 114249 states have internal predecessors, (536751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114250 states to 114250 states and 536751 transitions. [2021-03-10 20:41:42,181 INFO L78 Accepts]: Start accepts. Automaton has 114250 states and 536751 transitions. Word has length 12 [2021-03-10 20:41:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:42,181 INFO L480 AbstractCegarLoop]: Abstraction has 114250 states and 536751 transitions. [2021-03-10 20:41:42,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 114250 states and 536751 transitions. [2021-03-10 20:41:42,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 20:41:42,181 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:42,182 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:42,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 20:41:42,382 INFO L428 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:42,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:42,382 INFO L82 PathProgramCache]: Analyzing trace with hash 898692023, now seen corresponding path program 1 times [2021-03-10 20:41:42,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:42,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661863941] [2021-03-10 20:41:42,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 20:41:42,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661863941] [2021-03-10 20:41:42,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636192763] [2021-03-10 20:41:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:41:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:42,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 20:41:42,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:41:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:42,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:41:42,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-03-10 20:41:42,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063512679] [2021-03-10 20:41:42,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 20:41:42,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 20:41:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 20:41:42,515 INFO L87 Difference]: Start difference. First operand 114250 states and 536751 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:46,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:46,380 INFO L93 Difference]: Finished difference Result 377369 states and 1637422 transitions. [2021-03-10 20:41:46,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 20:41:46,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 13 [2021-03-10 20:41:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:48,646 INFO L225 Difference]: With dead ends: 377369 [2021-03-10 20:41:48,646 INFO L226 Difference]: Without dead ends: 375571 [2021-03-10 20:41:48,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2021-03-10 20:41:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375571 states. [2021-03-10 20:42:00,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375571 to 131520. [2021-03-10 20:42:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131520 states, 131435 states have (on average 4.726731844638034) internal successors, (621258), 131519 states have internal predecessors, (621258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:42:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131520 states to 131520 states and 621258 transitions. [2021-03-10 20:42:01,737 INFO L78 Accepts]: Start accepts. Automaton has 131520 states and 621258 transitions. Word has length 13 [2021-03-10 20:42:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:42:01,737 INFO L480 AbstractCegarLoop]: Abstraction has 131520 states and 621258 transitions. [2021-03-10 20:42:01,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:42:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 131520 states and 621258 transitions. [2021-03-10 20:42:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 20:42:01,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:42:01,744 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:42:01,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:42:01,968 INFO L428 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:42:01,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:42:01,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1802851987, now seen corresponding path program 1 times [2021-03-10 20:42:01,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:42:01,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469763093] [2021-03-10 20:42:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:42:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:42:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 20:42:02,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469763093] [2021-03-10 20:42:02,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520674390] [2021-03-10 20:42:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:42:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:42:02,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 20:42:02,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:42:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:42:02,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:42:02,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-03-10 20:42:02,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409192818] [2021-03-10 20:42:02,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 20:42:02,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:42:02,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 20:42:02,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-03-10 20:42:02,132 INFO L87 Difference]: Start difference. First operand 131520 states and 621258 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:42:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:42:09,608 INFO L93 Difference]: Finished difference Result 686671 states and 2995181 transitions. [2021-03-10 20:42:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 20:42:09,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 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 15 [2021-03-10 20:42:09,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:42:13,494 INFO L225 Difference]: With dead ends: 686671 [2021-03-10 20:42:13,494 INFO L226 Difference]: Without dead ends: 685685 [2021-03-10 20:42:13,495 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 502.9ms TimeCoverageRelationStatistics Valid=625, Invalid=2027, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 20:42:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685685 states. [2021-03-10 20:42:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685685 to 143421. [2021-03-10 20:42:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143421 states, 143336 states have (on average 4.776301836244907) internal successors, (684616), 143420 states have internal predecessors, (684616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:42:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143421 states to 143421 states and 684616 transitions. [2021-03-10 20:42:30,680 INFO L78 Accepts]: Start accepts. Automaton has 143421 states and 684616 transitions. Word has length 15 [2021-03-10 20:42:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:42:30,680 INFO L480 AbstractCegarLoop]: Abstraction has 143421 states and 684616 transitions. [2021-03-10 20:42:30,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:42:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 143421 states and 684616 transitions. [2021-03-10 20:42:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 20:42:30,681 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:42:30,687 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:42:30,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 20:42:30,910 INFO L428 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:42:30,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:42:30,910 INFO L82 PathProgramCache]: Analyzing trace with hash 354605553, now seen corresponding path program 2 times [2021-03-10 20:42:30,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:42:30,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641306020] [2021-03-10 20:42:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:42:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:42:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:42:30,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641306020] [2021-03-10 20:42:30,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280080734] [2021-03-10 20:42:30,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:42:30,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 20:42:30,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:42:30,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:42:30,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:42:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:42:31,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:42:31,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-03-10 20:42:31,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98703341] [2021-03-10 20:42:31,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 20:42:31,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:42:31,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 20:42:31,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 20:42:31,111 INFO L87 Difference]: Start difference. First operand 143421 states and 684616 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:42:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:42:37,029 INFO L93 Difference]: Finished difference Result 541284 states and 2394536 transitions. [2021-03-10 20:42:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 20:42:37,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 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 15 [2021-03-10 20:42:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:42:39,984 INFO L225 Difference]: With dead ends: 541284 [2021-03-10 20:42:39,984 INFO L226 Difference]: Without dead ends: 539030 [2021-03-10 20:42:39,985 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1123.8ms TimeCoverageRelationStatistics Valid=513, Invalid=1467, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 20:42:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539030 states. [2021-03-10 20:42:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539030 to 137146. [2021-03-10 20:42:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137146 states, 137061 states have (on average 4.715790779288054) internal successors, (646351), 137145 states have internal predecessors, (646351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:42:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137146 states to 137146 states and 646351 transitions. [2021-03-10 20:42:54,659 INFO L78 Accepts]: Start accepts. Automaton has 137146 states and 646351 transitions. Word has length 15 [2021-03-10 20:42:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:42:54,660 INFO L480 AbstractCegarLoop]: Abstraction has 137146 states and 646351 transitions. [2021-03-10 20:42:54,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:42:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand 137146 states and 646351 transitions. [2021-03-10 20:42:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 20:42:54,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:42:54,661 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:42:54,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:42:54,871 INFO L428 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:42:54,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:42:54,873 INFO L82 PathProgramCache]: Analyzing trace with hash 354600598, now seen corresponding path program 1 times [2021-03-10 20:42:54,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:42:54,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976019590] [2021-03-10 20:42:54,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:42:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:42:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:42:54,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976019590] [2021-03-10 20:42:54,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896751934] [2021-03-10 20:42:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 20:42:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:42:54,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 20:42:54,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:42:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:42:55,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:42:55,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-03-10 20:42:55,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300900147] [2021-03-10 20:42:55,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 20:42:55,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:42:55,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 20:42:55,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-03-10 20:42:55,094 INFO L87 Difference]: Start difference. First operand 137146 states and 646351 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:42:56,343 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-03-10 20:43:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:43:05,975 INFO L93 Difference]: Finished difference Result 898866 states and 3952976 transitions. [2021-03-10 20:43:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 20:43:05,976 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 15 [2021-03-10 20:43:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:43:11,812 INFO L225 Difference]: With dead ends: 898866 [2021-03-10 20:43:11,813 INFO L226 Difference]: Without dead ends: 895966 [2021-03-10 20:43:11,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 1326.9ms TimeCoverageRelationStatistics Valid=1143, Invalid=3827, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 20:43:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895966 states. [2021-03-10 20:43:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895966 to 143886. [2021-03-10 20:43:32,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143886 states, 143801 states have (on average 4.714640371068351) internal successors, (677970), 143885 states have internal predecessors, (677970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:43:34,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143886 states to 143886 states and 677970 transitions. [2021-03-10 20:43:34,777 INFO L78 Accepts]: Start accepts. Automaton has 143886 states and 677970 transitions. Word has length 15 [2021-03-10 20:43:34,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:43:34,777 INFO L480 AbstractCegarLoop]: Abstraction has 143886 states and 677970 transitions. [2021-03-10 20:43:34,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:43:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 143886 states and 677970 transitions. [2021-03-10 20:43:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 20:43:34,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:43:34,779 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:43:34,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 20:43:34,983 INFO L428 AbstractCegarLoop]: === Iteration 12 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:43:34,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:43:34,983 INFO L82 PathProgramCache]: Analyzing trace with hash 345077398, now seen corresponding path program 2 times [2021-03-10 20:43:34,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:43:34,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43909463] [2021-03-10 20:43:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:43:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:43:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:43:35,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43909463] [2021-03-10 20:43:35,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401869235] [2021-03-10 20:43:35,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 20:43:35,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 20:43:35,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:43:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:43:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:43:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:43:35,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:43:35,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-03-10 20:43:35,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135366395] [2021-03-10 20:43:35,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 20:43:35,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:43:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 20:43:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 20:43:35,200 INFO L87 Difference]: Start difference. First operand 143886 states and 677970 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:43:46,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:43:46,208 INFO L93 Difference]: Finished difference Result 956683 states and 4197476 transitions. [2021-03-10 20:43:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-10 20:43:46,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 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 15 [2021-03-10 20:43:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:43:51,534 INFO L225 Difference]: With dead ends: 956683 [2021-03-10 20:43:51,534 INFO L226 Difference]: Without dead ends: 951703 [2021-03-10 20:43:51,535 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 1413.0ms TimeCoverageRelationStatistics Valid=1210, Invalid=3902, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 20:44:01,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951703 states. [2021-03-10 20:44:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951703 to 150683. [2021-03-10 20:44:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150683 states, 150598 states have (on average 4.712326856930371) internal successors, (709667), 150682 states have internal predecessors, (709667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:44:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150683 states to 150683 states and 709667 transitions. [2021-03-10 20:44:15,676 INFO L78 Accepts]: Start accepts. Automaton has 150683 states and 709667 transitions. Word has length 15 [2021-03-10 20:44:15,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:44:15,676 INFO L480 AbstractCegarLoop]: Abstraction has 150683 states and 709667 transitions. [2021-03-10 20:44:15,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:44:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 150683 states and 709667 transitions. [2021-03-10 20:44:15,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 20:44:15,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:44:15,678 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:44:15,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 20:44:15,878 INFO L428 AbstractCegarLoop]: === Iteration 13 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:44:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:44:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1881941464, now seen corresponding path program 3 times [2021-03-10 20:44:15,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:44:15,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403638524] [2021-03-10 20:44:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:44:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:44:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:44:15,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403638524] [2021-03-10 20:44:15,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584329368] [2021-03-10 20:44:15,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:44:15,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 20:44:15,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:44:15,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 20:44:15,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:44:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:44:16,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:44:16,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-03-10 20:44:16,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767384929] [2021-03-10 20:44:16,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 20:44:16,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:44:16,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 20:44:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 20:44:16,073 INFO L87 Difference]: Start difference. First operand 150683 states and 709667 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:44:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:44:28,980 INFO L93 Difference]: Finished difference Result 1095593 states and 4819723 transitions. [2021-03-10 20:44:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 20:44:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 15 [2021-03-10 20:44:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:44:35,832 INFO L225 Difference]: With dead ends: 1095593 [2021-03-10 20:44:35,833 INFO L226 Difference]: Without dead ends: 1093147 [2021-03-10 20:44:35,834 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 664.5ms TimeCoverageRelationStatistics Valid=972, Invalid=2934, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 20:44:46,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093147 states. [2021-03-10 20:45:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093147 to 150687. [2021-03-10 20:45:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150687 states, 150602 states have (on average 4.712248177315042) internal successors, (709674), 150686 states have internal predecessors, (709674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:45:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150687 states to 150687 states and 709674 transitions. [2021-03-10 20:45:04,241 INFO L78 Accepts]: Start accepts. Automaton has 150687 states and 709674 transitions. Word has length 15 [2021-03-10 20:45:04,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:45:04,241 INFO L480 AbstractCegarLoop]: Abstraction has 150687 states and 709674 transitions. [2021-03-10 20:45:04,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:45:04,241 INFO L276 IsEmpty]: Start isEmpty. Operand 150687 states and 709674 transitions. [2021-03-10 20:45:04,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 20:45:04,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:45:04,243 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:45:04,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 20:45:04,443 INFO L428 AbstractCegarLoop]: === Iteration 14 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:45:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:45:04,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1800542408, now seen corresponding path program 4 times [2021-03-10 20:45:04,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:45:04,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376306426] [2021-03-10 20:45:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:45:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:45:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:45:04,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376306426] [2021-03-10 20:45:04,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726194384] [2021-03-10 20:45:04,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:45:04,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 20:45:04,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:45:04,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 20:45:04,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:45:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:45:04,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:45:04,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-03-10 20:45:04,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868437945] [2021-03-10 20:45:04,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 20:45:04,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:45:04,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 20:45:04,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-10 20:45:04,629 INFO L87 Difference]: Start difference. First operand 150687 states and 709674 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:45:15,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:45:15,245 INFO L93 Difference]: Finished difference Result 946809 states and 4218355 transitions. [2021-03-10 20:45:15,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 20:45:15,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 15 [2021-03-10 20:45:15,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:45:20,512 INFO L225 Difference]: With dead ends: 946809 [2021-03-10 20:45:20,513 INFO L226 Difference]: Without dead ends: 945643 [2021-03-10 20:45:20,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=670, Invalid=1780, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 20:45:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945643 states. [2021-03-10 20:45:43,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945643 to 149005. [2021-03-10 20:45:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149005 states, 148920 states have (on average 4.707514101531023) internal successors, (701043), 149004 states have internal predecessors, (701043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:45:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149005 states to 149005 states and 701043 transitions. [2021-03-10 20:45:45,973 INFO L78 Accepts]: Start accepts. Automaton has 149005 states and 701043 transitions. Word has length 15 [2021-03-10 20:45:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:45:45,981 INFO L480 AbstractCegarLoop]: Abstraction has 149005 states and 701043 transitions. [2021-03-10 20:45:45,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:45:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 149005 states and 701043 transitions. [2021-03-10 20:45:46,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 20:45:46,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:45:46,009 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:45:46,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 20:45:46,223 INFO L428 AbstractCegarLoop]: === Iteration 15 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:45:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:45:46,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1519911188, now seen corresponding path program 5 times [2021-03-10 20:45:46,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:45:46,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649832878] [2021-03-10 20:45:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:45:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:45:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:45:46,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649832878] [2021-03-10 20:45:46,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828258637] [2021-03-10 20:45:46,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:45:46,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 20:45:46,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:45:46,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 20:45:46,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:45:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:45:46,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:45:46,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-03-10 20:45:46,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580493075] [2021-03-10 20:45:46,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 20:45:46,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:45:46,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 20:45:46,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 20:45:46,477 INFO L87 Difference]: Start difference. First operand 149005 states and 701043 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:46:03,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:46:03,489 INFO L93 Difference]: Finished difference Result 1258082 states and 5489767 transitions. [2021-03-10 20:46:03,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 20:46:03,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 15 [2021-03-10 20:46:03,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:46:10,837 INFO L225 Difference]: With dead ends: 1258082 [2021-03-10 20:46:10,837 INFO L226 Difference]: Without dead ends: 1256146 [2021-03-10 20:46:10,838 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 1243.6ms TimeCoverageRelationStatistics Valid=1503, Invalid=4503, Unknown=0, NotChecked=0, Total=6006 [2021-03-10 20:46:22,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256146 states. [2021-03-10 20:46:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256146 to 148945. [2021-03-10 20:46:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148945 states, 148860 states have (on average 4.707732097272605) internal successors, (700793), 148944 states have internal predecessors, (700793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:46:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148945 states to 148945 states and 700793 transitions. [2021-03-10 20:46:47,569 INFO L78 Accepts]: Start accepts. Automaton has 148945 states and 700793 transitions. Word has length 15 [2021-03-10 20:46:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:46:47,569 INFO L480 AbstractCegarLoop]: Abstraction has 148945 states and 700793 transitions. [2021-03-10 20:46:47,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:46:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 148945 states and 700793 transitions. [2021-03-10 20:46:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 20:46:47,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:46:47,570 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:46:47,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 20:46:47,771 INFO L428 AbstractCegarLoop]: === Iteration 16 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:46:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:46:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1927751914, now seen corresponding path program 6 times [2021-03-10 20:46:47,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:46:47,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86331897] [2021-03-10 20:46:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:46:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:46:48,551 WARN L205 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-03-10 20:46:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 20:46:48,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86331897] [2021-03-10 20:46:48,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81022591] [2021-03-10 20:46:48,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:46:48,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 20:46:48,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 20:46:48,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:46:48,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:46:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:46:48,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:46:48,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 20:46:48,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408340290] [2021-03-10 20:46:48,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 20:46:48,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:46:48,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 20:46:48,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 20:46:48,802 INFO L87 Difference]: Start difference. First operand 148945 states and 700793 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:46:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:46:57,174 INFO L93 Difference]: Finished difference Result 778536 states and 3413323 transitions. [2021-03-10 20:46:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 20:46:57,175 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 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 15 [2021-03-10 20:46:57,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:47:01,221 INFO L225 Difference]: With dead ends: 778536 [2021-03-10 20:47:01,221 INFO L226 Difference]: Without dead ends: 777604 [2021-03-10 20:47:01,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1606.7ms TimeCoverageRelationStatistics Valid=961, Invalid=3199, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 20:47:10,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777604 states. [2021-03-10 20:47:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777604 to 147166. [2021-03-10 20:47:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147166 states, 147081 states have (on average 4.706223101556286) internal successors, (692196), 147165 states have internal predecessors, (692196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:47:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147166 states to 147166 states and 692196 transitions. [2021-03-10 20:47:22,292 INFO L78 Accepts]: Start accepts. Automaton has 147166 states and 692196 transitions. Word has length 15 [2021-03-10 20:47:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:47:22,292 INFO L480 AbstractCegarLoop]: Abstraction has 147166 states and 692196 transitions. [2021-03-10 20:47:22,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:47:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 147166 states and 692196 transitions. [2021-03-10 20:47:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 20:47:22,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:47:22,314 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:47:22,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:47:22,514 INFO L428 AbstractCegarLoop]: === Iteration 17 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:47:22,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:47:22,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1868847926, now seen corresponding path program 1 times [2021-03-10 20:47:22,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:47:22,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734586193] [2021-03-10 20:47:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:47:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:47:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-03-10 20:47:22,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734586193] [2021-03-10 20:47:22,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888226440] [2021-03-10 20:47:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:47:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:47:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 20:47:22,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:47:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:47:22,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:47:22,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2021-03-10 20:47:22,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618530943] [2021-03-10 20:47:22,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 20:47:22,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:47:22,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 20:47:22,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-10 20:47:22,741 INFO L87 Difference]: Start difference. First operand 147166 states and 692196 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:47:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:47:28,206 INFO L93 Difference]: Finished difference Result 478362 states and 2097787 transitions. [2021-03-10 20:47:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 20:47:28,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 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 16 [2021-03-10 20:47:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-03-10 20:47:31,836 INFO L225 Difference]: With dead ends: 478362 [2021-03-10 20:47:31,836 INFO L226 Difference]: Without dead ends: 476082 [2021-03-10 20:47:31,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown