/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/pthread_nondet_loop_bound.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 18:39:11,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 18:39:11,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 18:39:11,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 18:39:11,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 18:39:11,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 18:39:11,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 18:39:11,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 18:39:11,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 18:39:11,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 18:39:11,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 18:39:11,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 18:39:11,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 18:39:11,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 18:39:11,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 18:39:11,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 18:39:11,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-12 18:39:11,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 18:39:11,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 18:39:11,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 18:39:11,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-12 18:39:11,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 18:39:11,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 18:39:11,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 18:39:11,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 18:39:11,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 18:39:11,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 18:39:11,244 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 18:39:11,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 18:39:11,244 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 18:39:11,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 18:39:11,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 18:39:11,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 18:39:11,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 18:39:11,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 18:39:11,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 18:39:11,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 18:39:11,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 18:39:11,246 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 18:39:11,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 18:39:11,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 18:39:11,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 18:39:11,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 18:39:11,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 18:39:11,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 18:39:11,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 18:39:11,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 18:39:11,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 18:39:11,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 18:39:11,247 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 18:39:11,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 18:39:11,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 18:39:11,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 18:39:11,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 18:39:11,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 18:39:11,512 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 18:39:11,513 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 18:39:11,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/pthread_nondet_loop_bound.bpl [2021-08-12 18:39:11,514 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/pthread_nondet_loop_bound.bpl' [2021-08-12 18:39:11,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 18:39:11,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 18:39:11,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 18:39:11,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 18:39:11,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 18:39:11,553 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 12.08 06:39:11" (1/1) ... [2021-08-12 18:39:11,558 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 12.08 06:39:11" (1/1) ... [2021-08-12 18:39:11,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 18:39:11,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 18:39:11,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 18:39:11,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 18:39:11,571 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 12.08 06:39:11" (1/1) ... [2021-08-12 18:39:11,572 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 12.08 06:39:11" (1/1) ... [2021-08-12 18:39:11,572 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 12.08 06:39:11" (1/1) ... [2021-08-12 18:39:11,572 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 12.08 06:39:11" (1/1) ... [2021-08-12 18:39:11,574 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 12.08 06:39:11" (1/1) ... [2021-08-12 18:39:11,576 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 12.08 06:39:11" (1/1) ... [2021-08-12 18:39:11,577 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 12.08 06:39:11" (1/1) ... [2021-08-12 18:39:11,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 18:39:11,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 18:39:11,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 18:39:11,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 18:39:11,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:39:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 18:39:11,638 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 18:39:11,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 18:39:11,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 18:39:11,639 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-08-12 18:39:11,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-08-12 18:39:11,640 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-08-12 18:39:11,640 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 18:39:11,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 18:39:11,751 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 18:39:11,753 INFO L202 PluginConnector]: Adding new model pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:39:11 BoogieIcfgContainer [2021-08-12 18:39:11,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 18:39:11,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 18:39:11,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 18:39:11,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 18:39:11,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:39:11" (1/2) ... [2021-08-12 18:39:11,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559fa104 and model type pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 06:39:11, skipping insertion in model container [2021-08-12 18:39:11,757 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 12.08 06:39:11" (2/2) ... [2021-08-12 18:39:11,758 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread_nondet_loop_bound.bpl [2021-08-12 18:39:11,764 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 18:39:11,764 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 18:39:11,765 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 18:39:11,786 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,786 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,787 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,787 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,792 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,795 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 18:39:11,817 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 18:39:11,839 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:39:11,839 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:39:11,839 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:39:11,839 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:39:11,839 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:39:11,839 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:39:11,839 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:39:11,839 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:39:11,848 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 13 transitions, 31 flow [2021-08-12 18:39:11,862 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) [2021-08-12 18:39:11,865 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) [2021-08-12 18:39:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-12 18:39:11,869 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:11,870 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-08-12 18:39:11,870 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:11,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:11,874 INFO L82 PathProgramCache]: Analyzing trace with hash 268777336, now seen corresponding path program 1 times [2021-08-12 18:39:11,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:11,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673950602] [2021-08-12 18:39:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:39:11,935 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:39:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:39:11,946 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:39:11,957 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 18:39:11,957 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 18:39:11,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 18:39:11,958 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 18:39:11,958 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-08-12 18:39:11,964 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,965 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,965 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,965 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,966 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,966 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,966 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,966 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,967 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,970 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:11,983 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 18:39:11,984 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-12 18:39:11,985 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:39:11,985 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:39:11,985 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:39:11,985 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:39:11,985 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:39:11,985 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:39:11,986 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:39:11,986 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:39:11,987 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 50 flow [2021-08-12 18:39:12,004 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) [2021-08-12 18:39:12,006 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) [2021-08-12 18:39:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-12 18:39:12,007 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:12,007 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:12,007 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:12,008 INFO L82 PathProgramCache]: Analyzing trace with hash 513720736, now seen corresponding path program 1 times [2021-08-12 18:39:12,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:12,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118645344] [2021-08-12 18:39:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:12,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:12,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118645344] [2021-08-12 18:39:12,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118645344] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:39:12,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:39:12,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:39:12,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137569149] [2021-08-12 18:39:12,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:39:12,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:12,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:39:12,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:39:12,169 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) [2021-08-12 18:39:12,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:12,453 INFO L93 Difference]: Finished difference Result 556 states and 1281 transitions. [2021-08-12 18:39:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:39:12,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-12 18:39:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:12,468 INFO L225 Difference]: With dead ends: 556 [2021-08-12 18:39:12,468 INFO L226 Difference]: Without dead ends: 403 [2021-08-12 18:39:12,471 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:39:12,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-08-12 18:39:12,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 261. [2021-08-12 18:39:12,544 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) [2021-08-12 18:39:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 615 transitions. [2021-08-12 18:39:12,549 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 615 transitions. Word has length 7 [2021-08-12 18:39:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:12,549 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 615 transitions. [2021-08-12 18:39:12,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:39:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 615 transitions. [2021-08-12 18:39:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 18:39:12,550 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:12,550 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:12,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 18:39:12,551 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:12,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1047128168, now seen corresponding path program 1 times [2021-08-12 18:39:12,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:12,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023518692] [2021-08-12 18:39:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:39:12,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:12,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023518692] [2021-08-12 18:39:12,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023518692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:12,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167930797] [2021-08-12 18:39:12,624 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) [2021-08-12 18:39:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:39:12,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:12,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167930797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:12,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:39:12,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-12 18:39:12,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540116137] [2021-08-12 18:39:12,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:39:12,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:12,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:39:12,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:39:12,811 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) [2021-08-12 18:39:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:13,107 INFO L93 Difference]: Finished difference Result 550 states and 1201 transitions. [2021-08-12 18:39:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:39:13,108 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 [2021-08-12 18:39:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:13,118 INFO L225 Difference]: With dead ends: 550 [2021-08-12 18:39:13,118 INFO L226 Difference]: Without dead ends: 458 [2021-08-12 18:39:13,120 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:39:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-12 18:39:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 245. [2021-08-12 18:39:13,141 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) [2021-08-12 18:39:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 570 transitions. [2021-08-12 18:39:13,143 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 570 transitions. Word has length 10 [2021-08-12 18:39:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:13,143 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 570 transitions. [2021-08-12 18:39:13,143 INFO L483 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) [2021-08-12 18:39:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 570 transitions. [2021-08-12 18:39:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 18:39:13,144 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:13,144 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2021-08-12 18:39:13,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-12 18:39:13,361 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:13,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:13,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1047115182, now seen corresponding path program 1 times [2021-08-12 18:39:13,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:13,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470923072] [2021-08-12 18:39:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:39:13,367 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:39:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:39:13,374 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:39:13,375 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 18:39:13,375 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 18:39:13,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 18:39:13,375 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 18:39:13,375 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-08-12 18:39:13,383 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,383 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,384 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,385 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,385 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,385 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,385 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,385 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,386 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,386 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,386 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,386 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,387 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,388 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,389 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:13,389 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 18:39:13,390 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-12 18:39:13,394 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:39:13,394 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:39:13,394 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:39:13,394 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:39:13,394 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:39:13,394 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:39:13,394 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:39:13,394 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:39:13,395 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 71 flow [2021-08-12 18:39:13,443 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) [2021-08-12 18:39:13,448 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) [2021-08-12 18:39:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-12 18:39:13,448 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:13,448 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:13,448 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1966221566, now seen corresponding path program 1 times [2021-08-12 18:39:13,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:13,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058928178] [2021-08-12 18:39:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:13,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:13,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058928178] [2021-08-12 18:39:13,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058928178] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:39:13,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:39:13,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:39:13,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337043186] [2021-08-12 18:39:13,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:39:13,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:39:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:39:13,492 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) [2021-08-12 18:39:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:13,810 INFO L93 Difference]: Finished difference Result 4697 states and 14525 transitions. [2021-08-12 18:39:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:39:13,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-12 18:39:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:13,836 INFO L225 Difference]: With dead ends: 4697 [2021-08-12 18:39:13,836 INFO L226 Difference]: Without dead ends: 3847 [2021-08-12 18:39:13,841 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:39:13,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3847 states. [2021-08-12 18:39:13,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3847 to 2031. [2021-08-12 18:39:13,936 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) [2021-08-12 18:39:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 6425 transitions. [2021-08-12 18:39:13,947 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 6425 transitions. Word has length 7 [2021-08-12 18:39:13,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:13,947 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 6425 transitions. [2021-08-12 18:39:13,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:39:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 6425 transitions. [2021-08-12 18:39:13,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 18:39:13,949 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:13,949 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:13,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 18:39:13,950 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:13,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:13,951 INFO L82 PathProgramCache]: Analyzing trace with hash 408196648, now seen corresponding path program 1 times [2021-08-12 18:39:13,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:13,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857514996] [2021-08-12 18:39:13,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:39:14,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:14,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857514996] [2021-08-12 18:39:14,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857514996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:14,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584581685] [2021-08-12 18:39:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:14,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:39:14,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:39:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:14,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584581685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:14,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:39:14,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-12 18:39:14,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354504795] [2021-08-12 18:39:14,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:39:14,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:14,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:39:14,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:39:14,156 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) [2021-08-12 18:39:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:14,655 INFO L93 Difference]: Finished difference Result 6268 states and 18254 transitions. [2021-08-12 18:39:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:39:14,655 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 [2021-08-12 18:39:14,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:14,700 INFO L225 Difference]: With dead ends: 6268 [2021-08-12 18:39:14,700 INFO L226 Difference]: Without dead ends: 5523 [2021-08-12 18:39:14,703 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:39:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2021-08-12 18:39:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 2232. [2021-08-12 18:39:14,794 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) [2021-08-12 18:39:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 7072 transitions. [2021-08-12 18:39:14,805 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 7072 transitions. Word has length 10 [2021-08-12 18:39:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:14,805 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 7072 transitions. [2021-08-12 18:39:14,806 INFO L483 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) [2021-08-12 18:39:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 7072 transitions. [2021-08-12 18:39:14,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 18:39:14,807 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:14,807 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:15,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:15,023 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:15,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:15,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1819859788, now seen corresponding path program 1 times [2021-08-12 18:39:15,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:15,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537604399] [2021-08-12 18:39:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:39:15,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:15,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537604399] [2021-08-12 18:39:15,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537604399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:15,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656479046] [2021-08-12 18:39:15,071 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) [2021-08-12 18:39:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:15,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:39:15,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:15,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656479046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:15,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:39:15,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:39:15,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061980398] [2021-08-12 18:39:15,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:39:15,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:15,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:39:15,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:39:15,221 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) [2021-08-12 18:39:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:16,420 INFO L93 Difference]: Finished difference Result 10709 states and 30188 transitions. [2021-08-12 18:39:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 18:39:16,421 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 [2021-08-12 18:39:16,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:16,465 INFO L225 Difference]: With dead ends: 10709 [2021-08-12 18:39:16,465 INFO L226 Difference]: Without dead ends: 10202 [2021-08-12 18:39:16,469 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=561, Invalid=1601, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 18:39:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10202 states. [2021-08-12 18:39:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10202 to 2356. [2021-08-12 18:39:16,613 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) [2021-08-12 18:39:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 7475 transitions. [2021-08-12 18:39:16,627 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 7475 transitions. Word has length 12 [2021-08-12 18:39:16,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:16,628 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 7475 transitions. [2021-08-12 18:39:16,628 INFO L483 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) [2021-08-12 18:39:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 7475 transitions. [2021-08-12 18:39:16,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 18:39:16,629 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:16,629 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:16,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:16,829 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:16,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:16,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1434960332, now seen corresponding path program 2 times [2021-08-12 18:39:16,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:16,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482393700] [2021-08-12 18:39:16,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:16,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:16,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482393700] [2021-08-12 18:39:16,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482393700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:16,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585800932] [2021-08-12 18:39:16,878 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:16,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:39:16,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:39:16,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:39:16,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:39:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:17,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585800932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:17,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:39:17,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:39:17,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195138878] [2021-08-12 18:39:17,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:39:17,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:17,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:39:17,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:39:17,017 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) [2021-08-12 18:39:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:18,898 INFO L93 Difference]: Finished difference Result 12690 states and 35442 transitions. [2021-08-12 18:39:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-12 18:39:18,898 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 [2021-08-12 18:39:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:18,933 INFO L225 Difference]: With dead ends: 12690 [2021-08-12 18:39:18,933 INFO L226 Difference]: Without dead ends: 12109 [2021-08-12 18:39:18,938 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 585.8ms TimeCoverageRelationStatistics Valid=883, Invalid=2657, Unknown=0, NotChecked=0, Total=3540 [2021-08-12 18:39:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12109 states. [2021-08-12 18:39:19,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12109 to 2303. [2021-08-12 18:39:19,131 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) [2021-08-12 18:39:19,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 7260 transitions. [2021-08-12 18:39:19,143 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 7260 transitions. Word has length 12 [2021-08-12 18:39:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:19,144 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 7260 transitions. [2021-08-12 18:39:19,144 INFO L483 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) [2021-08-12 18:39:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 7260 transitions. [2021-08-12 18:39:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 18:39:19,148 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:19,148 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:19,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:19,362 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:19,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:19,362 INFO L82 PathProgramCache]: Analyzing trace with hash 35510376, now seen corresponding path program 3 times [2021-08-12 18:39:19,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:19,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492313965] [2021-08-12 18:39:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:39:19,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:19,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492313965] [2021-08-12 18:39:19,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492313965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:19,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186779417] [2021-08-12 18:39:19,404 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 [2021-08-12 18:39:19,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 18:39:19,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:39:19,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:39:19,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:39:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:19,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186779417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:19,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:39:19,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:39:19,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143609051] [2021-08-12 18:39:19,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:39:19,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:19,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:39:19,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:39:19,521 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) [2021-08-12 18:39:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:21,143 INFO L93 Difference]: Finished difference Result 9444 states and 26301 transitions. [2021-08-12 18:39:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 18:39:21,145 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 [2021-08-12 18:39:21,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:21,167 INFO L225 Difference]: With dead ends: 9444 [2021-08-12 18:39:21,168 INFO L226 Difference]: Without dead ends: 8949 [2021-08-12 18:39:21,171 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 469.8ms TimeCoverageRelationStatistics Valid=667, Invalid=1985, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 18:39:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8949 states. [2021-08-12 18:39:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8949 to 2272. [2021-08-12 18:39:21,342 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) [2021-08-12 18:39:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 7147 transitions. [2021-08-12 18:39:21,354 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 7147 transitions. Word has length 12 [2021-08-12 18:39:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:21,355 INFO L482 AbstractCegarLoop]: Abstraction has 2272 states and 7147 transitions. [2021-08-12 18:39:21,355 INFO L483 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) [2021-08-12 18:39:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 7147 transitions. [2021-08-12 18:39:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 18:39:21,356 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:21,356 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:21,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:21,569 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:21,569 INFO L82 PathProgramCache]: Analyzing trace with hash -825742738, now seen corresponding path program 4 times [2021-08-12 18:39:21,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:21,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272068699] [2021-08-12 18:39:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:39:21,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:21,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272068699] [2021-08-12 18:39:21,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272068699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:21,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136751819] [2021-08-12 18:39:21,620 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 [2021-08-12 18:39:21,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:39:21,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:39:21,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:39:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:39:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:21,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136751819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:21,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:39:21,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:39:21,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180470139] [2021-08-12 18:39:21,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:39:21,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:21,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:39:21,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:39:21,757 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) [2021-08-12 18:39:24,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:24,104 INFO L93 Difference]: Finished difference Result 11090 states and 30626 transitions. [2021-08-12 18:39:24,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-12 18:39:24,105 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 [2021-08-12 18:39:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:24,129 INFO L225 Difference]: With dead ends: 11090 [2021-08-12 18:39:24,129 INFO L226 Difference]: Without dead ends: 10597 [2021-08-12 18:39:24,133 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=1000, Invalid=3160, Unknown=0, NotChecked=0, Total=4160 [2021-08-12 18:39:24,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10597 states. [2021-08-12 18:39:24,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10597 to 1994. [2021-08-12 18:39:24,321 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) [2021-08-12 18:39:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6288 transitions. [2021-08-12 18:39:24,330 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6288 transitions. Word has length 12 [2021-08-12 18:39:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:24,331 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6288 transitions. [2021-08-12 18:39:24,331 INFO L483 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) [2021-08-12 18:39:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6288 transitions. [2021-08-12 18:39:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 18:39:24,332 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:24,332 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:24,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:24,547 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:24,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1147361507, now seen corresponding path program 1 times [2021-08-12 18:39:24,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:24,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741140752] [2021-08-12 18:39:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:39:24,551 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:39:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:39:24,553 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:39:24,554 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 18:39:24,554 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 18:39:24,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-12 18:39:24,555 WARN L235 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 18:39:24,555 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-08-12 18:39:24,561 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,564 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,564 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,565 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,565 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,565 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,566 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,566 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,566 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,566 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,566 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,566 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,566 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,566 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,567 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,567 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,567 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,568 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,569 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,570 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:39:24,570 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 18:39:24,570 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-12 18:39:24,571 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:39:24,571 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:39:24,571 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:39:24,571 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:39:24,571 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:39:24,571 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:39:24,571 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:39:24,571 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:39:24,574 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 31 transitions, 94 flow [2021-08-12 18:39:25,102 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) [2021-08-12 18:39:25,129 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) [2021-08-12 18:39:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-12 18:39:25,130 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:25,130 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:25,130 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash 331295731, now seen corresponding path program 1 times [2021-08-12 18:39:25,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:25,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763809761] [2021-08-12 18:39:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:25,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:25,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763809761] [2021-08-12 18:39:25,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763809761] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:39:25,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:39:25,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:39:25,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400110386] [2021-08-12 18:39:25,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:39:25,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:25,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:39:25,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:39:25,177 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) [2021-08-12 18:39:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:25,812 INFO L93 Difference]: Finished difference Result 33994 states and 132831 transitions. [2021-08-12 18:39:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:39:25,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-12 18:39:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:25,916 INFO L225 Difference]: With dead ends: 33994 [2021-08-12 18:39:25,916 INFO L226 Difference]: Without dead ends: 28891 [2021-08-12 18:39:25,934 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:39:26,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28891 states. [2021-08-12 18:39:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28891 to 14115. [2021-08-12 18:39:26,622 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) [2021-08-12 18:39:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14115 states to 14115 states and 55638 transitions. [2021-08-12 18:39:26,683 INFO L78 Accepts]: Start accepts. Automaton has 14115 states and 55638 transitions. Word has length 7 [2021-08-12 18:39:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:26,684 INFO L482 AbstractCegarLoop]: Abstraction has 14115 states and 55638 transitions. [2021-08-12 18:39:26,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:39:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 14115 states and 55638 transitions. [2021-08-12 18:39:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 18:39:26,684 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:26,684 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:26,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-12 18:39:26,684 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash -590120179, now seen corresponding path program 1 times [2021-08-12 18:39:26,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:26,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046260510] [2021-08-12 18:39:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:39:26,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:26,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046260510] [2021-08-12 18:39:26,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046260510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:26,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622159960] [2021-08-12 18:39:26,708 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) [2021-08-12 18:39:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:26,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:39:26,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:26,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622159960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:26,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:39:26,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-12 18:39:26,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876953695] [2021-08-12 18:39:26,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:39:26,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:26,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:39:26,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:39:26,803 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) [2021-08-12 18:39:28,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:28,364 INFO L93 Difference]: Finished difference Result 49941 states and 182257 transitions. [2021-08-12 18:39:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:39:28,364 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 [2021-08-12 18:39:28,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:28,525 INFO L225 Difference]: With dead ends: 49941 [2021-08-12 18:39:28,525 INFO L226 Difference]: Without dead ends: 44427 [2021-08-12 18:39:28,546 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:39:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44427 states. [2021-08-12 18:39:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44427 to 16232. [2021-08-12 18:39:29,490 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) [2021-08-12 18:39:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16232 states to 16232 states and 64279 transitions. [2021-08-12 18:39:29,561 INFO L78 Accepts]: Start accepts. Automaton has 16232 states and 64279 transitions. Word has length 10 [2021-08-12 18:39:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:29,561 INFO L482 AbstractCegarLoop]: Abstraction has 16232 states and 64279 transitions. [2021-08-12 18:39:29,561 INFO L483 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) [2021-08-12 18:39:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 16232 states and 64279 transitions. [2021-08-12 18:39:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 18:39:29,561 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:29,562 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:29,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:29,762 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:29,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:29,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1450030414, now seen corresponding path program 1 times [2021-08-12 18:39:29,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:29,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470411976] [2021-08-12 18:39:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:39:29,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:29,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470411976] [2021-08-12 18:39:29,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470411976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:29,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363034196] [2021-08-12 18:39:29,800 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 [2021-08-12 18:39:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:29,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:39:29,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:39:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:29,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363034196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:29,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:39:29,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:39:29,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405850827] [2021-08-12 18:39:29,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:39:29,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:29,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:39:29,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:39:29,926 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) [2021-08-12 18:39:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:35,740 INFO L93 Difference]: Finished difference Result 105252 states and 368643 transitions. [2021-08-12 18:39:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-12 18:39:35,741 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 [2021-08-12 18:39:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:36,225 INFO L225 Difference]: With dead ends: 105252 [2021-08-12 18:39:36,225 INFO L226 Difference]: Without dead ends: 101682 [2021-08-12 18:39:36,257 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 594.8ms TimeCoverageRelationStatistics Valid=1000, Invalid=3160, Unknown=0, NotChecked=0, Total=4160 [2021-08-12 18:39:36,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101682 states. [2021-08-12 18:39:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101682 to 17739. [2021-08-12 18:39:38,110 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) [2021-08-12 18:39:38,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17739 states to 17739 states and 71162 transitions. [2021-08-12 18:39:38,221 INFO L78 Accepts]: Start accepts. Automaton has 17739 states and 71162 transitions. Word has length 12 [2021-08-12 18:39:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:38,222 INFO L482 AbstractCegarLoop]: Abstraction has 17739 states and 71162 transitions. [2021-08-12 18:39:38,222 INFO L483 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) [2021-08-12 18:39:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 17739 states and 71162 transitions. [2021-08-12 18:39:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 18:39:38,222 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:38,223 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:38,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-12 18:39:38,429 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:38,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:38,429 INFO L82 PathProgramCache]: Analyzing trace with hash -169812180, now seen corresponding path program 2 times [2021-08-12 18:39:38,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:38,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966867358] [2021-08-12 18:39:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:38,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:38,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966867358] [2021-08-12 18:39:38,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966867358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:38,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472428783] [2021-08-12 18:39:38,477 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:38,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:39:38,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:39:38,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:39:38,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:39:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:38,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472428783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:38,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:39:38,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:39:38,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378472134] [2021-08-12 18:39:38,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:39:38,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:38,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:39:38,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:39:38,601 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) [2021-08-12 18:39:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:48,225 INFO L93 Difference]: Finished difference Result 111924 states and 394578 transitions. [2021-08-12 18:39:48,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-12 18:39:48,225 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 [2021-08-12 18:39:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:48,632 INFO L225 Difference]: With dead ends: 111924 [2021-08-12 18:39:48,632 INFO L226 Difference]: Without dead ends: 107568 [2021-08-12 18:39:48,888 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 517.9ms TimeCoverageRelationStatistics Valid=883, Invalid=2657, Unknown=0, NotChecked=0, Total=3540 [2021-08-12 18:39:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107568 states. [2021-08-12 18:39:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107568 to 16516. [2021-08-12 18:39:50,472 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) [2021-08-12 18:39:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16516 states to 16516 states and 65151 transitions. [2021-08-12 18:39:50,876 INFO L78 Accepts]: Start accepts. Automaton has 16516 states and 65151 transitions. Word has length 12 [2021-08-12 18:39:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:50,876 INFO L482 AbstractCegarLoop]: Abstraction has 16516 states and 65151 transitions. [2021-08-12 18:39:50,876 INFO L483 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) [2021-08-12 18:39:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 16516 states and 65151 transitions. [2021-08-12 18:39:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 18:39:50,877 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:50,877 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:51,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 18:39:51,081 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:51,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1503398707, now seen corresponding path program 1 times [2021-08-12 18:39:51,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:51,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273463212] [2021-08-12 18:39:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 18:39:51,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:51,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273463212] [2021-08-12 18:39:51,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273463212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:51,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786966874] [2021-08-12 18:39:51,106 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 [2021-08-12 18:39:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:51,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:39:51,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:39:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:51,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786966874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:51,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:39:51,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-08-12 18:39:51,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587686075] [2021-08-12 18:39:51,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 18:39:51,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:51,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 18:39:51,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:39:51,207 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) [2021-08-12 18:39:51,491 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-08-12 18:39:56,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:39:56,486 INFO L93 Difference]: Finished difference Result 57413 states and 211060 transitions. [2021-08-12 18:39:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 18:39:56,487 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 [2021-08-12 18:39:56,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:39:56,683 INFO L225 Difference]: With dead ends: 57413 [2021-08-12 18:39:56,683 INFO L226 Difference]: Without dead ends: 50767 [2021-08-12 18:39:56,706 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2021-08-12 18:39:56,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50767 states. [2021-08-12 18:39:58,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50767 to 18338. [2021-08-12 18:39:58,066 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) [2021-08-12 18:39:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18338 states to 18338 states and 72645 transitions. [2021-08-12 18:39:58,152 INFO L78 Accepts]: Start accepts. Automaton has 18338 states and 72645 transitions. Word has length 13 [2021-08-12 18:39:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:39:58,153 INFO L482 AbstractCegarLoop]: Abstraction has 18338 states and 72645 transitions. [2021-08-12 18:39:58,153 INFO L483 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) [2021-08-12 18:39:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 18338 states and 72645 transitions. [2021-08-12 18:39:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:39:58,154 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:39:58,154 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:39:58,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 18:39:58,357 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:39:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:39:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1459288340, now seen corresponding path program 1 times [2021-08-12 18:39:58,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:39:58,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227049023] [2021-08-12 18:39:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:39:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:39:58,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:39:58,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227049023] [2021-08-12 18:39:58,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227049023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:58,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081337728] [2021-08-12 18:39:58,415 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:39:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:39:58,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:39:58,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:39:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:39:58,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081337728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:39:58,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:39:58,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-08-12 18:39:58,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892796575] [2021-08-12 18:39:58,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 18:39:58,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:39:58,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 18:39:58,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:39:58,550 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) [2021-08-12 18:40:10,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:40:10,938 INFO L93 Difference]: Finished difference Result 94887 states and 348060 transitions. [2021-08-12 18:40:10,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-12 18:40:10,939 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 [2021-08-12 18:40:10,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:40:11,280 INFO L225 Difference]: With dead ends: 94887 [2021-08-12 18:40:11,281 INFO L226 Difference]: Without dead ends: 90874 [2021-08-12 18:40:11,309 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 587.1ms TimeCoverageRelationStatistics Valid=823, Invalid=2717, Unknown=0, NotChecked=0, Total=3540 [2021-08-12 18:40:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90874 states. [2021-08-12 18:40:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90874 to 19300. [2021-08-12 18:40:13,365 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) [2021-08-12 18:40:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19300 states to 19300 states and 77120 transitions. [2021-08-12 18:40:13,473 INFO L78 Accepts]: Start accepts. Automaton has 19300 states and 77120 transitions. Word has length 15 [2021-08-12 18:40:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:40:13,473 INFO L482 AbstractCegarLoop]: Abstraction has 19300 states and 77120 transitions. [2021-08-12 18:40:13,473 INFO L483 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) [2021-08-12 18:40:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 19300 states and 77120 transitions. [2021-08-12 18:40:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:40:13,475 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:40:13,475 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:40:13,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 18:40:13,683 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:40:13,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:40:13,683 INFO L82 PathProgramCache]: Analyzing trace with hash 210295032, now seen corresponding path program 1 times [2021-08-12 18:40:13,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:40:13,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051898492] [2021-08-12 18:40:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:40:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:40:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:40:13,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:40:13,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051898492] [2021-08-12 18:40:13,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051898492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:40:13,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370399205] [2021-08-12 18:40:13,718 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 [2021-08-12 18:40:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:40:13,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:40:13,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:40:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:40:14,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370399205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:40:14,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:40:14,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-08-12 18:40:14,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683127996] [2021-08-12 18:40:14,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 18:40:14,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:40:14,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 18:40:14,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:40:14,038 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) [2021-08-12 18:40:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:40:29,236 INFO L93 Difference]: Finished difference Result 98926 states and 366153 transitions. [2021-08-12 18:40:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 18:40:29,237 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 [2021-08-12 18:40:29,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:40:29,714 INFO L225 Difference]: With dead ends: 98926 [2021-08-12 18:40:29,714 INFO L226 Difference]: Without dead ends: 94661 [2021-08-12 18:40:29,742 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=625, Invalid=2027, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 18:40:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94661 states. [2021-08-12 18:40:32,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94661 to 20612. [2021-08-12 18:40:32,337 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) [2021-08-12 18:40:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20612 states to 20612 states and 83214 transitions. [2021-08-12 18:40:32,451 INFO L78 Accepts]: Start accepts. Automaton has 20612 states and 83214 transitions. Word has length 15 [2021-08-12 18:40:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:40:32,452 INFO L482 AbstractCegarLoop]: Abstraction has 20612 states and 83214 transitions. [2021-08-12 18:40:32,452 INFO L483 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) [2021-08-12 18:40:32,452 INFO L276 IsEmpty]: Start isEmpty. Operand 20612 states and 83214 transitions. [2021-08-12 18:40:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:40:32,453 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:40:32,453 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:40:32,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 18:40:32,668 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:40:32,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:40:32,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1657134634, now seen corresponding path program 2 times [2021-08-12 18:40:32,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:40:32,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254433896] [2021-08-12 18:40:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:40:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:40:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:40:32,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:40:32,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254433896] [2021-08-12 18:40:32,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254433896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:40:32,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315238974] [2021-08-12 18:40:32,717 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 [2021-08-12 18:40:32,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:40:32,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:40:32,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:40:32,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:40:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:40:32,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315238974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:40:32,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:40:32,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-12 18:40:32,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219704598] [2021-08-12 18:40:32,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 18:40:32,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:40:32,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 18:40:32,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:40:32,860 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) [2021-08-12 18:40:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:40:47,011 INFO L93 Difference]: Finished difference Result 77196 states and 288053 transitions. [2021-08-12 18:40:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 18:40:47,012 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 [2021-08-12 18:40:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:40:47,276 INFO L225 Difference]: With dead ends: 77196 [2021-08-12 18:40:47,277 INFO L226 Difference]: Without dead ends: 72206 [2021-08-12 18:40:47,305 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=513, Invalid=1467, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 18:40:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72206 states. [2021-08-12 18:40:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72206 to 19478. [2021-08-12 18:40:49,276 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) [2021-08-12 18:40:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19478 states to 19478 states and 77430 transitions. [2021-08-12 18:40:49,384 INFO L78 Accepts]: Start accepts. Automaton has 19478 states and 77430 transitions. Word has length 15 [2021-08-12 18:40:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:40:49,384 INFO L482 AbstractCegarLoop]: Abstraction has 19478 states and 77430 transitions. [2021-08-12 18:40:49,384 INFO L483 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) [2021-08-12 18:40:49,384 INFO L276 IsEmpty]: Start isEmpty. Operand 19478 states and 77430 transitions. [2021-08-12 18:40:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:40:49,386 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:40:49,386 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:40:49,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:40:49,601 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:40:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:40:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1657139604, now seen corresponding path program 2 times [2021-08-12 18:40:49,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:40:49,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632526021] [2021-08-12 18:40:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:40:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:40:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:40:49,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:40:49,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632526021] [2021-08-12 18:40:49,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632526021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:40:49,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761911052] [2021-08-12 18:40:49,657 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 [2021-08-12 18:40:49,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:40:49,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:40:49,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:40:49,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:40:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:40:49,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761911052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:40:49,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:40:49,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-12 18:40:49,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901120786] [2021-08-12 18:40:49,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 18:40:49,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:40:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 18:40:49,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:40:49,768 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) [2021-08-12 18:41:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:41:06,438 INFO L93 Difference]: Finished difference Result 79568 states and 296718 transitions. [2021-08-12 18:41:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 18:41:06,439 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 [2021-08-12 18:41:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:41:06,734 INFO L225 Difference]: With dead ends: 79568 [2021-08-12 18:41:06,734 INFO L226 Difference]: Without dead ends: 74676 [2021-08-12 18:41:06,761 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 408.6ms TimeCoverageRelationStatistics Valid=513, Invalid=1467, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 18:41:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74676 states. [2021-08-12 18:41:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74676 to 18360. [2021-08-12 18:41:09,164 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) [2021-08-12 18:41:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18360 states to 18360 states and 72054 transitions. [2021-08-12 18:41:09,270 INFO L78 Accepts]: Start accepts. Automaton has 18360 states and 72054 transitions. Word has length 15 [2021-08-12 18:41:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:41:09,270 INFO L482 AbstractCegarLoop]: Abstraction has 18360 states and 72054 transitions. [2021-08-12 18:41:09,270 INFO L483 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) [2021-08-12 18:41:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 18360 states and 72054 transitions. [2021-08-12 18:41:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:41:09,272 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:41:09,272 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:41:09,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:41:09,473 INFO L430 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:41:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:41:09,473 INFO L82 PathProgramCache]: Analyzing trace with hash -70336879, now seen corresponding path program 1 times [2021-08-12 18:41:09,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:41:09,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840681885] [2021-08-12 18:41:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:41:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:41:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-12 18:41:09,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:41:09,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840681885] [2021-08-12 18:41:09,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840681885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:41:09,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418162060] [2021-08-12 18:41:09,499 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 [2021-08-12 18:41:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:41:09,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:41:09,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:41:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:41:09,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418162060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:41:09,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:41:09,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2021-08-12 18:41:09,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368687904] [2021-08-12 18:41:09,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:41:09,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:41:09,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:41:09,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:41:09,751 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) [2021-08-12 18:41:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:41:21,710 INFO L93 Difference]: Finished difference Result 60672 states and 225295 transitions. [2021-08-12 18:41:21,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 18:41:21,711 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 [2021-08-12 18:41:21,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:41:21,922 INFO L225 Difference]: With dead ends: 60672 [2021-08-12 18:41:21,922 INFO L226 Difference]: Without dead ends: 53239 [2021-08-12 18:41:21,944 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2021-08-12 18:41:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53239 states. [2021-08-12 18:41:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53239 to 19292. [2021-08-12 18:41:24,099 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) [2021-08-12 18:41:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19292 states to 19292 states and 75859 transitions. [2021-08-12 18:41:24,203 INFO L78 Accepts]: Start accepts. Automaton has 19292 states and 75859 transitions. Word has length 16 [2021-08-12 18:41:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:41:24,203 INFO L482 AbstractCegarLoop]: Abstraction has 19292 states and 75859 transitions. [2021-08-12 18:41:24,203 INFO L483 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) [2021-08-12 18:41:24,204 INFO L276 IsEmpty]: Start isEmpty. Operand 19292 states and 75859 transitions. [2021-08-12 18:41:24,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 18:41:24,206 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:41:24,206 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:41:24,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 18:41:24,413 INFO L430 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:41:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:41:24,413 INFO L82 PathProgramCache]: Analyzing trace with hash -70359785, now seen corresponding path program 1 times [2021-08-12 18:41:24,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:41:24,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964614288] [2021-08-12 18:41:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:41:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:41:24,417 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:41:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:41:24,419 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:41:24,420 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 18:41:24,420 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 18:41:24,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-12 18:41:24,420 WARN L235 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 18:41:24,420 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-08-12 18:41:24,424 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,424 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,424 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,424 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,424 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,425 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,426 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,426 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,427 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,427 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,428 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,428 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:41:24,429 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 18:41:24,429 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-12 18:41:24,430 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:41:24,430 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:41:24,430 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:41:24,430 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:41:24,430 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:41:24,430 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:41:24,430 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:41:24,430 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:41:24,431 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 37 transitions, 119 flow [2021-08-12 18:41:39,028 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) [2021-08-12 18:41:39,129 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) [2021-08-12 18:41:39,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-12 18:41:39,130 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:41:39,130 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:41:39,130 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:41:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:41:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash -96074578, now seen corresponding path program 1 times [2021-08-12 18:41:39,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:41:39,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686191103] [2021-08-12 18:41:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:41:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:41:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:41:39,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:41:39,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686191103] [2021-08-12 18:41:39,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686191103] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:41:39,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:41:39,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:41:39,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491260145] [2021-08-12 18:41:39,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:41:39,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:41:39,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:41:39,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:41:39,340 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) [2021-08-12 18:41:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:41:43,460 INFO L93 Difference]: Finished difference Result 227923 states and 1079476 transitions. [2021-08-12 18:41:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:41:43,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-12 18:41:43,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:41:44,632 INFO L225 Difference]: With dead ends: 227923 [2021-08-12 18:41:44,632 INFO L226 Difference]: Without dead ends: 195351 [2021-08-12 18:41:44,719 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:41:47,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195351 states. [2021-08-12 18:41:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195351 to 93243. [2021-08-12 18:41:51,904 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) [2021-08-12 18:41:52,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93243 states to 93243 states and 438389 transitions. [2021-08-12 18:41:52,693 INFO L78 Accepts]: Start accepts. Automaton has 93243 states and 438389 transitions. Word has length 7 [2021-08-12 18:41:52,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:41:52,694 INFO L482 AbstractCegarLoop]: Abstraction has 93243 states and 438389 transitions. [2021-08-12 18:41:52,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:41:52,694 INFO L276 IsEmpty]: Start isEmpty. Operand 93243 states and 438389 transitions. [2021-08-12 18:41:52,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 18:41:52,694 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:41:52,694 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:41:52,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-12 18:41:52,694 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:41:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:41:52,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1947837208, now seen corresponding path program 1 times [2021-08-12 18:41:52,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:41:52,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198433903] [2021-08-12 18:41:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:41:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:41:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:41:52,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:41:52,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198433903] [2021-08-12 18:41:52,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198433903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:41:52,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721730705] [2021-08-12 18:41:52,721 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 [2021-08-12 18:41:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:41:52,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:41:52,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:41:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:41:52,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721730705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:41:52,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:41:52,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-12 18:41:52,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039947190] [2021-08-12 18:41:52,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:41:52,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:41:52,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:41:52,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:41:52,805 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) [2021-08-12 18:42:02,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:42:02,130 INFO L93 Difference]: Finished difference Result 346278 states and 1518488 transitions. [2021-08-12 18:42:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:42:02,131 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 [2021-08-12 18:42:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:42:04,203 INFO L225 Difference]: With dead ends: 346278 [2021-08-12 18:42:04,203 INFO L226 Difference]: Without dead ends: 306637 [2021-08-12 18:42:04,370 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:42:08,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306637 states.