/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 19:56:10,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 19:56:10,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 19:56:10,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-21 19:56:10,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-21 19:56:10,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-21 19:56:10,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-21 19:56:10,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-21 19:56:10,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-21 19:56:10,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-21 19:56:10,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-21 19:56:10,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-21 19:56:10,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 19:56:10,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 19:56:10,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 19:56:10,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 19:56:10,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 19:56:10,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 19:56:10,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 19:56:10,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 19:56:10,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 19:56:10,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 19:56:10,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 19:56:10,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 19:56:10,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-21 19:56:10,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-21 19:56:10,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-21 19:56:10,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-21 19:56:10,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-21 19:56:10,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-21 19:56:10,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-21 19:56:10,740 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-21 19:56:10,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-21 19:56:10,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-21 19:56:10,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-21 19:56:10,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-21 19:56:10,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-21 19:56:10,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-21 19:56:10,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 19:56:10,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 19:56:10,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 19:56:10,747 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 19:56:10,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 19:56:10,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 19:56:10,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 19:56:10,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 19:56:10,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 19:56:10,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 19:56:10,776 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 19:56:10,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 19:56:10,776 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 19:56:10,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 19:56:10,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 19:56:10,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 19:56:10,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 19:56:10,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 19:56:10,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 19:56:10,777 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 19:56:10,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 19:56:10,777 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 19:56:10,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 19:56:10,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 19:56:10,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 19:56:10,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 19:56:10,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 19:56:10,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 19:56:10,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 19:56:10,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 19:56:10,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 19:56:10,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 19:56:10,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 19:56:10,778 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 19:56:10,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 19:56:10,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 19:56:11,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 19:56:11,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 19:56:11,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 19:56:11,032 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 19:56:11,033 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 19:56:11,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl [2021-05-21 19:56:11,033 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl' [2021-05-21 19:56:11,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 19:56:11,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 19:56:11,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 19:56:11,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 19:56:11,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 19:56:11,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:56:11" (1/1) ... [2021-05-21 19:56:11,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:56:11" (1/1) ... [2021-05-21 19:56:11,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 19:56:11,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 19:56:11,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 19:56:11,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 19:56:11,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:56:11" (1/1) ... [2021-05-21 19:56:11,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:56:11" (1/1) ... [2021-05-21 19:56:11,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:56:11" (1/1) ... [2021-05-21 19:56:11,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:56:11" (1/1) ... [2021-05-21 19:56:11,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:56:11" (1/1) ... [2021-05-21 19:56:11,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:56:11" (1/1) ... [2021-05-21 19:56:11,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:56:11" (1/1) ... [2021-05-21 19:56:11,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 19:56:11,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 19:56:11,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 19:56:11,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 19:56:11,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:56:11" (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 [2021-05-21 19:56:11,150 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 19:56:11,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 19:56:11,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 19:56:11,151 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-05-21 19:56:11,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-05-21 19:56:11,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-05-21 19:56:11,152 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 19:56:11,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 19:56:11,244 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-21 19:56:11,245 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 07:56:11 BoogieIcfgContainer [2021-05-21 19:56:11,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 19:56:11,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 19:56:11,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 19:56:11,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 19:56:11,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:56:11" (1/2) ... [2021-05-21 19:56:11,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6824b3 and model type fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 07:56:11, skipping insertion in model container [2021-05-21 19:56:11,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 07:56:11" (2/2) ... [2021-05-21 19:56:11,250 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe.bpl [2021-05-21 19:56:11,254 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 19:56:11,254 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 19:56:11,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 19:56:11,255 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 19:56:11,266 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,266 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,266 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,266 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,271 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 19:56:11,284 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 19:56:11,297 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:56:11,297 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:56:11,297 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:56:11,297 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:56:11,297 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:56:11,297 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:56:11,297 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:56:11,297 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:56:11,303 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 10 transitions, 25 flow [2021-05-21 19:56:11,309 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:11,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:11,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-21 19:56:11,314 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:11,314 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-21 19:56:11,315 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-05-21 19:56:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:11,318 INFO L82 PathProgramCache]: Analyzing trace with hash 43134170, now seen corresponding path program 1 times [2021-05-21 19:56:11,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:11,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195634967] [2021-05-21 19:56:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:56:11,385 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:56:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:56:11,397 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:56:11,408 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 19:56:11,408 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 19:56:11,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 19:56:11,409 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 19:56:11,409 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-05-21 19:56:11,417 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,417 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,418 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,418 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,419 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,419 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,419 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,419 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,426 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 19:56:11,426 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 19:56:11,431 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:56:11,431 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:56:11,431 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:56:11,431 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:56:11,432 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:56:11,432 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:56:11,432 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:56:11,432 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:56:11,433 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2021-05-21 19:56:11,446 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-21 19:56:11,447 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:11,447 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-21 19:56:11,448 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash 57452648, now seen corresponding path program 1 times [2021-05-21 19:56:11,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:11,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143469279] [2021-05-21 19:56:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:11,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:11,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143469279] [2021-05-21 19:56:11,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143469279] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:11,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:11,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 19:56:11,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458483807] [2021-05-21 19:56:11,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:56:11,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:11,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:56:11,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:56:11,574 INFO L87 Difference]: Start difference. First operand has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:11,669 INFO L93 Difference]: Finished difference Result 112 states and 249 transitions. [2021-05-21 19:56:11,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 19:56:11,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-05-21 19:56:11,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:11,678 INFO L225 Difference]: With dead ends: 112 [2021-05-21 19:56:11,678 INFO L226 Difference]: Without dead ends: 103 [2021-05-21 19:56:11,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:56:11,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-21 19:56:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-21 19:56:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 96 states have (on average 2.3854166666666665) internal successors, (229), 102 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 229 transitions. [2021-05-21 19:56:11,728 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 229 transitions. Word has length 5 [2021-05-21 19:56:11,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:11,728 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 229 transitions. [2021-05-21 19:56:11,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 229 transitions. [2021-05-21 19:56:11,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-05-21 19:56:11,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:11,730 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-05-21 19:56:11,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 19:56:11,730 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:11,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:11,731 INFO L82 PathProgramCache]: Analyzing trace with hash -622629923, now seen corresponding path program 1 times [2021-05-21 19:56:11,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:11,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617332670] [2021-05-21 19:56:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:56:11,742 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:56:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:56:11,755 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:56:11,759 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 19:56:11,759 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 19:56:11,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 19:56:11,760 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 19:56:11,760 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-05-21 19:56:11,764 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,765 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,766 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,766 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,767 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,767 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,767 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,767 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,768 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,768 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,768 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,769 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:11,775 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 19:56:11,777 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-21 19:56:11,779 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:56:11,779 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:56:11,779 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:56:11,782 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:56:11,783 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:56:11,783 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:56:11,783 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:56:11,783 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:56:11,784 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 61 flow [2021-05-21 19:56:11,806 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:11,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:11,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-21 19:56:11,808 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:11,808 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-21 19:56:11,809 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:11,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:11,809 INFO L82 PathProgramCache]: Analyzing trace with hash 76542848, now seen corresponding path program 1 times [2021-05-21 19:56:11,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:11,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279860918] [2021-05-21 19:56:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:11,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:11,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279860918] [2021-05-21 19:56:11,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279860918] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:11,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:11,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 19:56:11,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181073847] [2021-05-21 19:56:11,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:56:11,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:11,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:56:11,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:56:11,856 INFO L87 Difference]: Start difference. First operand has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:11,948 INFO L93 Difference]: Finished difference Result 584 states and 1771 transitions. [2021-05-21 19:56:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 19:56:11,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-05-21 19:56:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:11,958 INFO L225 Difference]: With dead ends: 584 [2021-05-21 19:56:11,958 INFO L226 Difference]: Without dead ends: 567 [2021-05-21 19:56:11,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:56:11,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-05-21 19:56:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-05-21 19:56:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 549 states have (on average 3.1311475409836067) internal successors, (1719), 566 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1719 transitions. [2021-05-21 19:56:12,005 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1719 transitions. Word has length 5 [2021-05-21 19:56:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:12,005 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1719 transitions. [2021-05-21 19:56:12,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1719 transitions. [2021-05-21 19:56:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-05-21 19:56:12,005 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:12,006 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:12,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 19:56:12,006 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:12,006 INFO L82 PathProgramCache]: Analyzing trace with hash 542941744, now seen corresponding path program 1 times [2021-05-21 19:56:12,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:12,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816165089] [2021-05-21 19:56:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:12,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:12,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816165089] [2021-05-21 19:56:12,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816165089] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:12,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:12,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 19:56:12,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575471690] [2021-05-21 19:56:12,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:56:12,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:12,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:56:12,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:56:12,055 INFO L87 Difference]: Start difference. First operand 567 states and 1719 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:12,223 INFO L93 Difference]: Finished difference Result 1180 states and 3596 transitions. [2021-05-21 19:56:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 19:56:12,223 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 [2021-05-21 19:56:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:12,228 INFO L225 Difference]: With dead ends: 1180 [2021-05-21 19:56:12,228 INFO L226 Difference]: Without dead ends: 1180 [2021-05-21 19:56:12,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 19:56:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-05-21 19:56:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 560. [2021-05-21 19:56:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 542 states have (on average 3.1273062730627306) internal successors, (1695), 559 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1695 transitions. [2021-05-21 19:56:12,252 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1695 transitions. Word has length 7 [2021-05-21 19:56:12,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:12,252 INFO L482 AbstractCegarLoop]: Abstraction has 560 states and 1695 transitions. [2021-05-21 19:56:12,252 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) [2021-05-21 19:56:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1695 transitions. [2021-05-21 19:56:12,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:56:12,253 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:12,253 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:12,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 19:56:12,253 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:12,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:12,253 INFO L82 PathProgramCache]: Analyzing trace with hash -339906921, now seen corresponding path program 1 times [2021-05-21 19:56:12,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:12,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858353432] [2021-05-21 19:56:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:12,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:12,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858353432] [2021-05-21 19:56:12,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858353432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:56:12,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218467100] [2021-05-21 19:56:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:56:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:12,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 19:56:12,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:56:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:12,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218467100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:56:12,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:56:12,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-21 19:56:12,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137495309] [2021-05-21 19:56:12,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 19:56:12,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:12,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 19:56:12,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-21 19:56:12,503 INFO L87 Difference]: Start difference. First operand 560 states and 1695 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:12,585 INFO L93 Difference]: Finished difference Result 636 states and 1874 transitions. [2021-05-21 19:56:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 19:56:12,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 19:56:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:12,588 INFO L225 Difference]: With dead ends: 636 [2021-05-21 19:56:12,588 INFO L226 Difference]: Without dead ends: 632 [2021-05-21 19:56:12,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 19:56:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-05-21 19:56:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 512. [2021-05-21 19:56:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 496 states have (on average 3.1048387096774195) internal successors, (1540), 511 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1540 transitions. [2021-05-21 19:56:12,602 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1540 transitions. Word has length 8 [2021-05-21 19:56:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:12,603 INFO L482 AbstractCegarLoop]: Abstraction has 512 states and 1540 transitions. [2021-05-21 19:56:12,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1540 transitions. [2021-05-21 19:56:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:56:12,603 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:12,604 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:12,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-21 19:56:12,817 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:12,818 INFO L82 PathProgramCache]: Analyzing trace with hash -339906925, now seen corresponding path program 1 times [2021-05-21 19:56:12,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:12,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564043058] [2021-05-21 19:56:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:56:12,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:12,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564043058] [2021-05-21 19:56:12,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564043058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:12,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:12,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 19:56:12,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938556499] [2021-05-21 19:56:12,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:56:12,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:12,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:56:12,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:56:12,845 INFO L87 Difference]: Start difference. First operand 512 states and 1540 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:12,947 INFO L93 Difference]: Finished difference Result 1501 states and 4509 transitions. [2021-05-21 19:56:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 19:56:12,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 19:56:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:12,953 INFO L225 Difference]: With dead ends: 1501 [2021-05-21 19:56:12,953 INFO L226 Difference]: Without dead ends: 1492 [2021-05-21 19:56:12,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 19:56:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-05-21 19:56:12,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 551. [2021-05-21 19:56:12,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 535 states have (on average 3.100934579439252) internal successors, (1659), 550 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1659 transitions. [2021-05-21 19:56:12,972 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1659 transitions. Word has length 8 [2021-05-21 19:56:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:12,972 INFO L482 AbstractCegarLoop]: Abstraction has 551 states and 1659 transitions. [2021-05-21 19:56:12,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1659 transitions. [2021-05-21 19:56:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:56:12,973 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:12,973 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:12,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 19:56:12,973 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:12,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:12,973 INFO L82 PathProgramCache]: Analyzing trace with hash -348844225, now seen corresponding path program 2 times [2021-05-21 19:56:12,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:12,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506208443] [2021-05-21 19:56:12,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:56:13,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:13,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506208443] [2021-05-21 19:56:13,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506208443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:13,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:13,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 19:56:13,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000024314] [2021-05-21 19:56:13,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:56:13,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:13,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:56:13,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:56:13,012 INFO L87 Difference]: Start difference. First operand 551 states and 1659 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:13,144 INFO L93 Difference]: Finished difference Result 1316 states and 3968 transitions. [2021-05-21 19:56:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 19:56:13,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 19:56:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:13,151 INFO L225 Difference]: With dead ends: 1316 [2021-05-21 19:56:13,151 INFO L226 Difference]: Without dead ends: 1307 [2021-05-21 19:56:13,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 19:56:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-05-21 19:56:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 548. [2021-05-21 19:56:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 532 states have (on average 3.1090225563909772) internal successors, (1654), 547 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1654 transitions. [2021-05-21 19:56:13,170 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1654 transitions. Word has length 8 [2021-05-21 19:56:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:13,170 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1654 transitions. [2021-05-21 19:56:13,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1654 transitions. [2021-05-21 19:56:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:56:13,171 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:13,171 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:13,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-21 19:56:13,171 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:13,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:13,171 INFO L82 PathProgramCache]: Analyzing trace with hash -348671245, now seen corresponding path program 3 times [2021-05-21 19:56:13,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:13,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073601468] [2021-05-21 19:56:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:13,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:13,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073601468] [2021-05-21 19:56:13,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073601468] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:13,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:13,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 19:56:13,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292343] [2021-05-21 19:56:13,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:56:13,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:13,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:56:13,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:56:13,230 INFO L87 Difference]: Start difference. First operand 548 states and 1654 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:13,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:13,431 INFO L93 Difference]: Finished difference Result 1131 states and 3400 transitions. [2021-05-21 19:56:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 19:56:13,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 19:56:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:13,438 INFO L225 Difference]: With dead ends: 1131 [2021-05-21 19:56:13,438 INFO L226 Difference]: Without dead ends: 1116 [2021-05-21 19:56:13,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-21 19:56:13,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-05-21 19:56:13,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 467. [2021-05-21 19:56:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 452 states have (on average 3.099557522123894) internal successors, (1401), 466 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1401 transitions. [2021-05-21 19:56:13,476 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1401 transitions. Word has length 8 [2021-05-21 19:56:13,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:13,476 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1401 transitions. [2021-05-21 19:56:13,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1401 transitions. [2021-05-21 19:56:13,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-21 19:56:13,477 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:13,477 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:13,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-21 19:56:13,477 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:13,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:13,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2075805806, now seen corresponding path program 1 times [2021-05-21 19:56:13,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:13,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856531201] [2021-05-21 19:56:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:56:13,481 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:56:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:56:13,483 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:56:13,484 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 19:56:13,484 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 19:56:13,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-21 19:56:13,485 WARN L242 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 19:56:13,485 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-05-21 19:56:13,490 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,491 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,491 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,491 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,491 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,491 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,491 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,492 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,492 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,492 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,492 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,492 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,492 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,492 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,492 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,492 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:13,495 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 19:56:13,496 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-05-21 19:56:13,496 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:56:13,497 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:56:13,497 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:56:13,497 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:56:13,497 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:56:13,497 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:56:13,497 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:56:13,497 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:56:13,497 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-05-21 19:56:13,603 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2969 states, 2922 states have (on average 3.893223819301848) internal successors, (11376), 2968 states have internal predecessors, (11376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 2969 states, 2922 states have (on average 3.893223819301848) internal successors, (11376), 2968 states have internal predecessors, (11376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-21 19:56:13,610 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:13,610 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-21 19:56:13,610 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:13,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:13,611 INFO L82 PathProgramCache]: Analyzing trace with hash 100404189, now seen corresponding path program 1 times [2021-05-21 19:56:13,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:13,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233201288] [2021-05-21 19:56:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:13,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:13,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233201288] [2021-05-21 19:56:13,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233201288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:13,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:13,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 19:56:13,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302564087] [2021-05-21 19:56:13,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:56:13,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:56:13,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:56:13,655 INFO L87 Difference]: Start difference. First operand has 2969 states, 2922 states have (on average 3.893223819301848) internal successors, (11376), 2968 states have internal predecessors, (11376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:13,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:13,746 INFO L93 Difference]: Finished difference Result 2956 states and 11330 transitions. [2021-05-21 19:56:13,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 19:56:13,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-05-21 19:56:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:13,763 INFO L225 Difference]: With dead ends: 2956 [2021-05-21 19:56:13,763 INFO L226 Difference]: Without dead ends: 2923 [2021-05-21 19:56:13,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:56:13,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-05-21 19:56:13,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2923. [2021-05-21 19:56:13,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2882 states have (on average 3.885496183206107) internal successors, (11198), 2922 states have internal predecessors, (11198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 11198 transitions. [2021-05-21 19:56:13,873 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 11198 transitions. Word has length 5 [2021-05-21 19:56:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:13,873 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 11198 transitions. [2021-05-21 19:56:13,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 11198 transitions. [2021-05-21 19:56:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-05-21 19:56:13,875 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:13,875 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:13,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-21 19:56:13,875 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:13,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1998981745, now seen corresponding path program 1 times [2021-05-21 19:56:13,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:13,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859191457] [2021-05-21 19:56:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:13,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:13,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859191457] [2021-05-21 19:56:13,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859191457] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:13,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:13,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 19:56:13,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444115118] [2021-05-21 19:56:13,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:56:13,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:13,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:56:13,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:56:13,912 INFO L87 Difference]: Start difference. First operand 2923 states and 11198 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:14,084 INFO L93 Difference]: Finished difference Result 6688 states and 25812 transitions. [2021-05-21 19:56:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 19:56:14,084 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 [2021-05-21 19:56:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:14,129 INFO L225 Difference]: With dead ends: 6688 [2021-05-21 19:56:14,129 INFO L226 Difference]: Without dead ends: 6688 [2021-05-21 19:56:14,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 19:56:14,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2021-05-21 19:56:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 2913. [2021-05-21 19:56:14,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2872 states have (on average 3.885097493036212) internal successors, (11158), 2912 states have internal predecessors, (11158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 11158 transitions. [2021-05-21 19:56:14,334 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 11158 transitions. Word has length 7 [2021-05-21 19:56:14,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:14,334 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 11158 transitions. [2021-05-21 19:56:14,334 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) [2021-05-21 19:56:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 11158 transitions. [2021-05-21 19:56:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:56:14,334 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:14,334 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:14,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-21 19:56:14,335 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:14,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:14,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1838888163, now seen corresponding path program 1 times [2021-05-21 19:56:14,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:14,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106114907] [2021-05-21 19:56:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:14,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:14,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106114907] [2021-05-21 19:56:14,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106114907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:56:14,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433384223] [2021-05-21 19:56:14,362 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 [2021-05-21 19:56:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:14,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 19:56:14,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:56:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:14,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433384223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:56:14,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:56:14,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-21 19:56:14,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167390989] [2021-05-21 19:56:14,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 19:56:14,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:14,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 19:56:14,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-21 19:56:14,444 INFO L87 Difference]: Start difference. First operand 2913 states and 11158 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:14,559 INFO L93 Difference]: Finished difference Result 3797 states and 14239 transitions. [2021-05-21 19:56:14,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 19:56:14,560 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 19:56:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:14,629 INFO L225 Difference]: With dead ends: 3797 [2021-05-21 19:56:14,629 INFO L226 Difference]: Without dead ends: 3793 [2021-05-21 19:56:14,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 19:56:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2021-05-21 19:56:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 2825. [2021-05-21 19:56:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2786 states have (on average 3.8797559224694904) internal successors, (10809), 2824 states have internal predecessors, (10809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 10809 transitions. [2021-05-21 19:56:14,722 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 10809 transitions. Word has length 8 [2021-05-21 19:56:14,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:14,723 INFO L482 AbstractCegarLoop]: Abstraction has 2825 states and 10809 transitions. [2021-05-21 19:56:14,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 10809 transitions. [2021-05-21 19:56:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:56:14,723 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:14,723 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:14,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-21 19:56:14,939 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:14,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1838888167, now seen corresponding path program 1 times [2021-05-21 19:56:14,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:14,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007783912] [2021-05-21 19:56:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:15,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:15,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007783912] [2021-05-21 19:56:15,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007783912] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:15,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:15,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 19:56:15,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930203455] [2021-05-21 19:56:15,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:56:15,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:15,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:56:15,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:56:15,011 INFO L87 Difference]: Start difference. First operand 2825 states and 10809 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:15,220 INFO L93 Difference]: Finished difference Result 6503 states and 24965 transitions. [2021-05-21 19:56:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 19:56:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 19:56:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:15,239 INFO L225 Difference]: With dead ends: 6503 [2021-05-21 19:56:15,240 INFO L226 Difference]: Without dead ends: 6488 [2021-05-21 19:56:15,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-21 19:56:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6488 states. [2021-05-21 19:56:15,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6488 to 2836. [2021-05-21 19:56:15,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 2797 states have (on average 3.8698605648909545) internal successors, (10824), 2835 states have internal predecessors, (10824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 10824 transitions. [2021-05-21 19:56:15,408 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 10824 transitions. Word has length 8 [2021-05-21 19:56:15,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:15,408 INFO L482 AbstractCegarLoop]: Abstraction has 2836 states and 10824 transitions. [2021-05-21 19:56:15,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:15,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 10824 transitions. [2021-05-21 19:56:15,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:56:15,409 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:15,409 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:15,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-21 19:56:15,410 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1843846927, now seen corresponding path program 2 times [2021-05-21 19:56:15,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:15,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773286982] [2021-05-21 19:56:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:56:15,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:15,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773286982] [2021-05-21 19:56:15,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773286982] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:15,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:15,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 19:56:15,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017821178] [2021-05-21 19:56:15,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:56:15,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:15,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:56:15,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:56:15,449 INFO L87 Difference]: Start difference. First operand 2836 states and 10824 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:15,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:15,620 INFO L93 Difference]: Finished difference Result 7897 states and 30138 transitions. [2021-05-21 19:56:15,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 19:56:15,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 19:56:15,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:15,648 INFO L225 Difference]: With dead ends: 7897 [2021-05-21 19:56:15,648 INFO L226 Difference]: Without dead ends: 7888 [2021-05-21 19:56:15,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 19:56:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7888 states. [2021-05-21 19:56:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7888 to 2743. [2021-05-21 19:56:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2743 states, 2705 states have (on average 3.878743068391867) internal successors, (10492), 2742 states have internal predecessors, (10492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 10492 transitions. [2021-05-21 19:56:15,809 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 10492 transitions. Word has length 8 [2021-05-21 19:56:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:15,809 INFO L482 AbstractCegarLoop]: Abstraction has 2743 states and 10492 transitions. [2021-05-21 19:56:15,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:15,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 10492 transitions. [2021-05-21 19:56:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-21 19:56:15,809 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:15,809 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:15,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-21 19:56:15,810 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:15,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:15,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1170789958, now seen corresponding path program 1 times [2021-05-21 19:56:15,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:15,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146341666] [2021-05-21 19:56:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:15,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:15,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146341666] [2021-05-21 19:56:15,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146341666] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:15,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:15,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 19:56:15,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528420545] [2021-05-21 19:56:15,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:56:15,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:15,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:56:15,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:56:15,846 INFO L87 Difference]: Start difference. First operand 2743 states and 10492 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:16,049 INFO L93 Difference]: Finished difference Result 6277 states and 24190 transitions. [2021-05-21 19:56:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 19:56:16,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-05-21 19:56:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:16,073 INFO L225 Difference]: With dead ends: 6277 [2021-05-21 19:56:16,073 INFO L226 Difference]: Without dead ends: 6277 [2021-05-21 19:56:16,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-21 19:56:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2021-05-21 19:56:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 2736. [2021-05-21 19:56:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2698 states have (on average 3.8773165307635287) internal successors, (10461), 2735 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 10461 transitions. [2021-05-21 19:56:16,182 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 10461 transitions. Word has length 9 [2021-05-21 19:56:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:16,182 INFO L482 AbstractCegarLoop]: Abstraction has 2736 states and 10461 transitions. [2021-05-21 19:56:16,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 10461 transitions. [2021-05-21 19:56:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-21 19:56:16,182 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:16,183 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:16,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-21 19:56:16,183 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:16,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1934750506, now seen corresponding path program 1 times [2021-05-21 19:56:16,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:16,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216756095] [2021-05-21 19:56:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:16,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:16,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216756095] [2021-05-21 19:56:16,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216756095] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:16,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:16,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 19:56:16,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314168389] [2021-05-21 19:56:16,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 19:56:16,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:16,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 19:56:16,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 19:56:16,218 INFO L87 Difference]: Start difference. First operand 2736 states and 10461 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:16,436 INFO L93 Difference]: Finished difference Result 6137 states and 23593 transitions. [2021-05-21 19:56:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 19:56:16,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-21 19:56:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:16,455 INFO L225 Difference]: With dead ends: 6137 [2021-05-21 19:56:16,455 INFO L226 Difference]: Without dead ends: 6137 [2021-05-21 19:56:16,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-05-21 19:56:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6137 states. [2021-05-21 19:56:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6137 to 2750. [2021-05-21 19:56:16,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2712 states have (on average 3.870206489675516) internal successors, (10496), 2749 states have internal predecessors, (10496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 10496 transitions. [2021-05-21 19:56:16,587 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 10496 transitions. Word has length 10 [2021-05-21 19:56:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:16,587 INFO L482 AbstractCegarLoop]: Abstraction has 2750 states and 10496 transitions. [2021-05-21 19:56:16,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 10496 transitions. [2021-05-21 19:56:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-21 19:56:16,588 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:16,588 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:16,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-21 19:56:16,588 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:16,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1884882076, now seen corresponding path program 2 times [2021-05-21 19:56:16,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:16,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50689305] [2021-05-21 19:56:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:56:16,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:16,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50689305] [2021-05-21 19:56:16,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50689305] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:16,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:16,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 19:56:16,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291286404] [2021-05-21 19:56:16,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:56:16,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:16,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:56:16,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:56:16,617 INFO L87 Difference]: Start difference. First operand 2750 states and 10496 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:16,792 INFO L93 Difference]: Finished difference Result 8764 states and 33656 transitions. [2021-05-21 19:56:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 19:56:16,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-21 19:56:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:16,812 INFO L225 Difference]: With dead ends: 8764 [2021-05-21 19:56:16,812 INFO L226 Difference]: Without dead ends: 8764 [2021-05-21 19:56:16,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 19:56:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2021-05-21 19:56:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 2678. [2021-05-21 19:56:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2640 states have (on average 3.8700757575757576) internal successors, (10217), 2677 states have internal predecessors, (10217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 10217 transitions. [2021-05-21 19:56:16,938 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 10217 transitions. Word has length 10 [2021-05-21 19:56:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:16,938 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 10217 transitions. [2021-05-21 19:56:16,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 10217 transitions. [2021-05-21 19:56:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-21 19:56:16,938 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:16,938 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:16,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-21 19:56:16,939 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:16,939 INFO L82 PathProgramCache]: Analyzing trace with hash -152320659, now seen corresponding path program 1 times [2021-05-21 19:56:16,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:16,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804621535] [2021-05-21 19:56:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:56:16,941 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:56:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:56:16,943 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:56:16,944 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 19:56:16,944 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 19:56:16,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-21 19:56:16,944 WARN L242 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 19:56:16,944 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-05-21 19:56:16,948 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,948 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,948 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,948 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,948 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,948 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,948 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,948 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,948 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,948 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,949 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,949 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,949 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,949 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,949 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,949 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,949 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,949 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,949 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,949 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 19:56:16,953 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 19:56:16,953 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-05-21 19:56:16,954 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:56:16,954 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:56:16,954 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:56:16,954 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:56:16,954 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:56:16,954 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:56:16,954 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:56:16,954 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:56:16,954 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 30 transitions, 105 flow [2021-05-21 19:56:18,300 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 14844 states, 14749 states have (on average 4.661400772933758) internal successors, (68751), 14843 states have internal predecessors, (68751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 14844 states, 14749 states have (on average 4.661400772933758) internal successors, (68751), 14843 states have internal predecessors, (68751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-21 19:56:18,331 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:18,331 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-21 19:56:18,331 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:18,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:18,332 INFO L82 PathProgramCache]: Analyzing trace with hash 129037055, now seen corresponding path program 1 times [2021-05-21 19:56:18,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:18,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252989370] [2021-05-21 19:56:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:18,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:18,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252989370] [2021-05-21 19:56:18,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252989370] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:18,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:18,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 19:56:18,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668574581] [2021-05-21 19:56:18,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:56:18,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:18,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:56:18,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:56:18,382 INFO L87 Difference]: Start difference. First operand has 14844 states, 14749 states have (on average 4.661400772933758) internal successors, (68751), 14843 states have internal predecessors, (68751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:18,555 INFO L93 Difference]: Finished difference Result 14828 states and 68686 transitions. [2021-05-21 19:56:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 19:56:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-05-21 19:56:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:18,605 INFO L225 Difference]: With dead ends: 14828 [2021-05-21 19:56:18,605 INFO L226 Difference]: Without dead ends: 14763 [2021-05-21 19:56:18,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:56:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14763 states. [2021-05-21 19:56:19,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14763 to 14763. [2021-05-21 19:56:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14763 states, 14675 states have (on average 4.6583986371379895) internal successors, (68362), 14762 states have internal predecessors, (68362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14763 states to 14763 states and 68362 transitions. [2021-05-21 19:56:19,283 INFO L78 Accepts]: Start accepts. Automaton has 14763 states and 68362 transitions. Word has length 5 [2021-05-21 19:56:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:19,283 INFO L482 AbstractCegarLoop]: Abstraction has 14763 states and 68362 transitions. [2021-05-21 19:56:19,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 14763 states and 68362 transitions. [2021-05-21 19:56:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-05-21 19:56:19,283 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:19,283 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:19,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-21 19:56:19,284 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:19,284 INFO L82 PathProgramCache]: Analyzing trace with hash -549477417, now seen corresponding path program 1 times [2021-05-21 19:56:19,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:19,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6288288] [2021-05-21 19:56:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:19,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:19,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6288288] [2021-05-21 19:56:19,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6288288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:19,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:19,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 19:56:19,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440705886] [2021-05-21 19:56:19,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:56:19,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:19,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:56:19,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:56:19,317 INFO L87 Difference]: Start difference. First operand 14763 states and 68362 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:19,642 INFO L93 Difference]: Finished difference Result 35580 states and 165794 transitions. [2021-05-21 19:56:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 19:56:19,642 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 [2021-05-21 19:56:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:19,926 INFO L225 Difference]: With dead ends: 35580 [2021-05-21 19:56:19,926 INFO L226 Difference]: Without dead ends: 35580 [2021-05-21 19:56:19,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 19:56:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35580 states. [2021-05-21 19:56:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35580 to 14750. [2021-05-21 19:56:20,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14750 states, 14662 states have (on average 4.658504978856909) internal successors, (68303), 14749 states have internal predecessors, (68303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14750 states to 14750 states and 68303 transitions. [2021-05-21 19:56:21,052 INFO L78 Accepts]: Start accepts. Automaton has 14750 states and 68303 transitions. Word has length 7 [2021-05-21 19:56:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:21,052 INFO L482 AbstractCegarLoop]: Abstraction has 14750 states and 68303 transitions. [2021-05-21 19:56:21,052 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) [2021-05-21 19:56:21,052 INFO L276 IsEmpty]: Start isEmpty. Operand 14750 states and 68303 transitions. [2021-05-21 19:56:21,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:56:21,052 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:21,052 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:21,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-21 19:56:21,052 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:21,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:21,053 INFO L82 PathProgramCache]: Analyzing trace with hash 147218695, now seen corresponding path program 1 times [2021-05-21 19:56:21,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:21,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595357643] [2021-05-21 19:56:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:21,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:21,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595357643] [2021-05-21 19:56:21,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595357643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:56:21,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942302221] [2021-05-21 19:56:21,082 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) [2021-05-21 19:56:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:21,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 19:56:21,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:56:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:21,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942302221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:56:21,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:56:21,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-21 19:56:21,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336910715] [2021-05-21 19:56:21,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 19:56:21,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:21,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 19:56:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-21 19:56:21,196 INFO L87 Difference]: Start difference. First operand 14750 states and 68303 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:21,465 INFO L93 Difference]: Finished difference Result 20190 states and 91829 transitions. [2021-05-21 19:56:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 19:56:21,466 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 19:56:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:21,527 INFO L225 Difference]: With dead ends: 20190 [2021-05-21 19:56:21,527 INFO L226 Difference]: Without dead ends: 20186 [2021-05-21 19:56:21,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 19:56:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20186 states. [2021-05-21 19:56:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20186 to 14610. [2021-05-21 19:56:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14610 states, 14524 states have (on average 4.657601211787386) internal successors, (67647), 14609 states have internal predecessors, (67647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14610 states to 14610 states and 67647 transitions. [2021-05-21 19:56:22,321 INFO L78 Accepts]: Start accepts. Automaton has 14610 states and 67647 transitions. Word has length 8 [2021-05-21 19:56:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:22,321 INFO L482 AbstractCegarLoop]: Abstraction has 14610 states and 67647 transitions. [2021-05-21 19:56:22,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 14610 states and 67647 transitions. [2021-05-21 19:56:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:56:22,321 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:22,321 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:22,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 19:56:22,537 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:22,538 INFO L82 PathProgramCache]: Analyzing trace with hash 147218699, now seen corresponding path program 1 times [2021-05-21 19:56:22,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:22,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22194779] [2021-05-21 19:56:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:56:22,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:22,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22194779] [2021-05-21 19:56:22,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22194779] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:22,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:22,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 19:56:22,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039156903] [2021-05-21 19:56:22,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:56:22,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:22,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:56:22,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:56:22,562 INFO L87 Difference]: Start difference. First operand 14610 states and 67647 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:23,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:23,023 INFO L93 Difference]: Finished difference Result 41197 states and 190392 transitions. [2021-05-21 19:56:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 19:56:23,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 19:56:23,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:23,188 INFO L225 Difference]: With dead ends: 41197 [2021-05-21 19:56:23,188 INFO L226 Difference]: Without dead ends: 41188 [2021-05-21 19:56:23,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 19:56:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41188 states. [2021-05-21 19:56:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41188 to 14685. [2021-05-21 19:56:24,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14685 states, 14599 states have (on average 4.655387355298308) internal successors, (67964), 14684 states have internal predecessors, (67964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14685 states to 14685 states and 67964 transitions. [2021-05-21 19:56:24,207 INFO L78 Accepts]: Start accepts. Automaton has 14685 states and 67964 transitions. Word has length 8 [2021-05-21 19:56:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:24,207 INFO L482 AbstractCegarLoop]: Abstraction has 14685 states and 67964 transitions. [2021-05-21 19:56:24,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 14685 states and 67964 transitions. [2021-05-21 19:56:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:56:24,207 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:24,207 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:24,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-21 19:56:24,208 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:24,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:24,208 INFO L82 PathProgramCache]: Analyzing trace with hash 145431239, now seen corresponding path program 2 times [2021-05-21 19:56:24,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:24,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402203300] [2021-05-21 19:56:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:56:24,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:24,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402203300] [2021-05-21 19:56:24,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402203300] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:24,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:24,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 19:56:24,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977784957] [2021-05-21 19:56:24,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:56:24,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:24,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:56:24,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:56:24,237 INFO L87 Difference]: Start difference. First operand 14685 states and 67964 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:24,715 INFO L93 Difference]: Finished difference Result 36030 states and 167688 transitions. [2021-05-21 19:56:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 19:56:24,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 19:56:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:24,844 INFO L225 Difference]: With dead ends: 36030 [2021-05-21 19:56:24,844 INFO L226 Difference]: Without dead ends: 36021 [2021-05-21 19:56:24,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 19:56:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36021 states. [2021-05-21 19:56:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36021 to 14682. [2021-05-21 19:56:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14682 states, 14596 states have (on average 4.656001644286106) internal successors, (67959), 14681 states have internal predecessors, (67959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14682 states to 14682 states and 67959 transitions. [2021-05-21 19:56:25,745 INFO L78 Accepts]: Start accepts. Automaton has 14682 states and 67959 transitions. Word has length 8 [2021-05-21 19:56:25,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:25,745 INFO L482 AbstractCegarLoop]: Abstraction has 14682 states and 67959 transitions. [2021-05-21 19:56:25,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 14682 states and 67959 transitions. [2021-05-21 19:56:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-21 19:56:25,745 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:25,746 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:25,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-21 19:56:25,746 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:25,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:25,746 INFO L82 PathProgramCache]: Analyzing trace with hash 146065499, now seen corresponding path program 3 times [2021-05-21 19:56:25,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:25,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688947324] [2021-05-21 19:56:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:25,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:25,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688947324] [2021-05-21 19:56:25,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688947324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:25,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:25,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 19:56:25,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833718576] [2021-05-21 19:56:25,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:56:25,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:25,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:56:25,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:56:25,782 INFO L87 Difference]: Start difference. First operand 14682 states and 67959 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:26,155 INFO L93 Difference]: Finished difference Result 35343 states and 164489 transitions. [2021-05-21 19:56:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 19:56:26,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-21 19:56:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:26,273 INFO L225 Difference]: With dead ends: 35343 [2021-05-21 19:56:26,273 INFO L226 Difference]: Without dead ends: 35328 [2021-05-21 19:56:26,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-21 19:56:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35328 states. [2021-05-21 19:56:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35328 to 14479. [2021-05-21 19:56:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14479 states, 14394 states have (on average 4.657635125746839) internal successors, (67042), 14478 states have internal predecessors, (67042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:27,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14479 states to 14479 states and 67042 transitions. [2021-05-21 19:56:27,393 INFO L78 Accepts]: Start accepts. Automaton has 14479 states and 67042 transitions. Word has length 8 [2021-05-21 19:56:27,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:27,393 INFO L482 AbstractCegarLoop]: Abstraction has 14479 states and 67042 transitions. [2021-05-21 19:56:27,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:27,394 INFO L276 IsEmpty]: Start isEmpty. Operand 14479 states and 67042 transitions. [2021-05-21 19:56:27,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-21 19:56:27,394 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:27,394 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:27,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-21 19:56:27,394 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:27,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:27,394 INFO L82 PathProgramCache]: Analyzing trace with hash 233022064, now seen corresponding path program 1 times [2021-05-21 19:56:27,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:27,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724338306] [2021-05-21 19:56:27,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:27,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:27,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724338306] [2021-05-21 19:56:27,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724338306] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:27,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:27,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 19:56:27,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244499036] [2021-05-21 19:56:27,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:56:27,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:27,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:56:27,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:56:27,420 INFO L87 Difference]: Start difference. First operand 14479 states and 67042 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:27,777 INFO L93 Difference]: Finished difference Result 37319 states and 174666 transitions. [2021-05-21 19:56:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 19:56:27,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-05-21 19:56:27,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:28,075 INFO L225 Difference]: With dead ends: 37319 [2021-05-21 19:56:28,075 INFO L226 Difference]: Without dead ends: 37319 [2021-05-21 19:56:28,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-21 19:56:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37319 states. [2021-05-21 19:56:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37319 to 14469. [2021-05-21 19:56:28,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14469 states, 14384 states have (on average 4.657397107897664) internal successors, (66992), 14468 states have internal predecessors, (66992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14469 states to 14469 states and 66992 transitions. [2021-05-21 19:56:28,956 INFO L78 Accepts]: Start accepts. Automaton has 14469 states and 66992 transitions. Word has length 9 [2021-05-21 19:56:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:28,956 INFO L482 AbstractCegarLoop]: Abstraction has 14469 states and 66992 transitions. [2021-05-21 19:56:28,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 14469 states and 66992 transitions. [2021-05-21 19:56:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-21 19:56:28,957 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:28,957 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:28,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-21 19:56:28,957 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:28,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:28,957 INFO L82 PathProgramCache]: Analyzing trace with hash -256908636, now seen corresponding path program 1 times [2021-05-21 19:56:28,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:28,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857726351] [2021-05-21 19:56:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:56:28,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:28,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857726351] [2021-05-21 19:56:28,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857726351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:28,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:28,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 19:56:28,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549604260] [2021-05-21 19:56:28,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:56:28,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:28,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:56:28,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:56:28,984 INFO L87 Difference]: Start difference. First operand 14469 states and 66992 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:29,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:29,548 INFO L93 Difference]: Finished difference Result 49141 states and 228612 transitions. [2021-05-21 19:56:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 19:56:29,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-21 19:56:29,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:29,719 INFO L225 Difference]: With dead ends: 49141 [2021-05-21 19:56:29,719 INFO L226 Difference]: Without dead ends: 49141 [2021-05-21 19:56:29,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 19:56:30,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49141 states. [2021-05-21 19:56:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49141 to 14595. [2021-05-21 19:56:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14595 states, 14510 states have (on average 4.656650585802894) internal successors, (67568), 14594 states have internal predecessors, (67568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14595 states to 14595 states and 67568 transitions. [2021-05-21 19:56:30,782 INFO L78 Accepts]: Start accepts. Automaton has 14595 states and 67568 transitions. Word has length 10 [2021-05-21 19:56:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:30,782 INFO L482 AbstractCegarLoop]: Abstraction has 14595 states and 67568 transitions. [2021-05-21 19:56:30,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 14595 states and 67568 transitions. [2021-05-21 19:56:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-21 19:56:30,783 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:30,783 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:30,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-21 19:56:30,783 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1366921296, now seen corresponding path program 2 times [2021-05-21 19:56:30,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:30,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941232727] [2021-05-21 19:56:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:56:30,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941232727] [2021-05-21 19:56:30,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941232727] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:30,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:30,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 19:56:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144667504] [2021-05-21 19:56:30,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:56:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:56:30,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:56:30,818 INFO L87 Difference]: Start difference. First operand 14595 states and 67568 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:31,410 INFO L93 Difference]: Finished difference Result 38423 states and 179905 transitions. [2021-05-21 19:56:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 19:56:31,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-21 19:56:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:31,538 INFO L225 Difference]: With dead ends: 38423 [2021-05-21 19:56:31,538 INFO L226 Difference]: Without dead ends: 38423 [2021-05-21 19:56:31,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-05-21 19:56:32,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38423 states. [2021-05-21 19:56:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38423 to 14589. [2021-05-21 19:56:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14589 states, 14504 states have (on average 4.657473800330943) internal successors, (67552), 14588 states have internal predecessors, (67552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14589 states to 14589 states and 67552 transitions. [2021-05-21 19:56:32,422 INFO L78 Accepts]: Start accepts. Automaton has 14589 states and 67552 transitions. Word has length 10 [2021-05-21 19:56:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:32,422 INFO L482 AbstractCegarLoop]: Abstraction has 14589 states and 67552 transitions. [2021-05-21 19:56:32,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 14589 states and 67552 transitions. [2021-05-21 19:56:32,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-21 19:56:32,422 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:32,422 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:32,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-21 19:56:32,423 INFO L430 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:32,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1366258206, now seen corresponding path program 3 times [2021-05-21 19:56:32,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:32,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506246319] [2021-05-21 19:56:32,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:56:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:56:32,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:56:32,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506246319] [2021-05-21 19:56:32,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506246319] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:56:32,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:56:32,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 19:56:32,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529771665] [2021-05-21 19:56:32,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 19:56:32,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:56:32,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 19:56:32,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 19:56:32,460 INFO L87 Difference]: Start difference. First operand 14589 states and 67552 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:56:33,054 INFO L93 Difference]: Finished difference Result 37171 states and 173891 transitions. [2021-05-21 19:56:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 19:56:33,055 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-21 19:56:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:56:33,187 INFO L225 Difference]: With dead ends: 37171 [2021-05-21 19:56:33,187 INFO L226 Difference]: Without dead ends: 37171 [2021-05-21 19:56:33,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-05-21 19:56:33,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37171 states. [2021-05-21 19:56:34,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37171 to 14365. [2021-05-21 19:56:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14365 states, 14280 states have (on average 4.655392156862745) internal successors, (66479), 14364 states have internal predecessors, (66479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14365 states to 14365 states and 66479 transitions. [2021-05-21 19:56:34,149 INFO L78 Accepts]: Start accepts. Automaton has 14365 states and 66479 transitions. Word has length 10 [2021-05-21 19:56:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:56:34,149 INFO L482 AbstractCegarLoop]: Abstraction has 14365 states and 66479 transitions. [2021-05-21 19:56:34,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:56:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 14365 states and 66479 transitions. [2021-05-21 19:56:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-21 19:56:34,150 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:56:34,150 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:56:34,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-21 19:56:34,150 INFO L430 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:56:34,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:56:34,150 INFO L82 PathProgramCache]: Analyzing trace with hash 630577724, now seen corresponding path program 1 times [2021-05-21 19:56:34,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:56:34,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263035627] [2021-05-21 19:56:34,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:56:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:56:34,152 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:56:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 19:56:34,153 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 19:56:34,154 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 19:56:34,155 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 19:56:34,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-21 19:56:34,156 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2021-05-21 19:56:34,163 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 07:56:34 BasicIcfg [2021-05-21 19:56:34,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 19:56:34,164 INFO L168 Benchmark]: Toolchain (without parser) took 23092.04 ms. Allocated memory was 367.0 MB in the beginning and 11.8 GB in the end (delta: 11.4 GB). Free memory was 346.1 MB in the beginning and 9.8 GB in the end (delta: -9.4 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.0 GB. [2021-05-21 19:56:34,164 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 367.0 MB. Free memory is still 347.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 19:56:34,164 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.52 ms. Allocated memory is still 367.0 MB. Free memory was 346.1 MB in the beginning and 344.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 19:56:34,164 INFO L168 Benchmark]: Boogie Preprocessor took 10.31 ms. Allocated memory is still 367.0 MB. Free memory was 344.6 MB in the beginning and 343.7 MB in the end (delta: 923.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 19:56:34,164 INFO L168 Benchmark]: RCFGBuilder took 140.04 ms. Allocated memory is still 367.0 MB. Free memory was 343.6 MB in the beginning and 335.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-05-21 19:56:34,164 INFO L168 Benchmark]: TraceAbstraction took 22917.01 ms. Allocated memory was 367.0 MB in the beginning and 11.8 GB in the end (delta: 11.4 GB). Free memory was 334.8 MB in the beginning and 9.8 GB in the end (delta: -9.4 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.0 GB. [2021-05-21 19:56:34,164 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 367.0 MB. Free memory is still 347.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.52 ms. Allocated memory is still 367.0 MB. Free memory was 346.1 MB in the beginning and 344.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.31 ms. Allocated memory is still 367.0 MB. Free memory was 344.6 MB in the beginning and 343.7 MB in the end (delta: 923.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 140.04 ms. Allocated memory is still 367.0 MB. Free memory was 343.6 MB in the beginning and 335.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 22917.01 ms. Allocated memory was 367.0 MB in the beginning and 11.8 GB in the end (delta: 11.4 GB). Free memory was 334.8 MB in the beginning and 9.8 GB in the end (delta: -9.4 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: assertion can be violated assertion can be violated We found a FailurePath: [L24] 0 x := 0; VAL [x=0] [L25] 0 i := 0; VAL [i=0, x=0] [L28] FORK 0 fork i thread(i); VAL [i=0, x=0, y=0] [L16] 1 x := x + 1; VAL [i=0, x=1, y=0] [L29] 0 i := i + 1; VAL [i=1, x=1, y=0] [L28] FORK 0 fork i thread(i); VAL [i=1, x=1, y=1] [L16] 2 x := x + 1; VAL [i=1, x=2, y=1] [L29] 0 i := i + 1; VAL [i=2, x=2, y=1] [L28] FORK 0 fork i thread(i); VAL [i=2, x=2, y=1] [L16] 3 x := x + 1; VAL [i=2, x=3, y=1] [L17] 1 assert x <= y + 2; VAL [i=2, x=3, y=1] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 16 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 114.1ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 4.5ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.9ms SsaConstructionTime, 14.3ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 329.0ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 1.6ms, AutomataDifference: 126.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8 SDtfs, 21 SDslu, 24 SDs, 0 SdLazy, 37 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 39.8ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.9ms SsaConstructionTime, 14.1ms SatisfiabilityAnalysisTime, 85.0ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 14 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 26 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1706.4ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 4.0ms, AutomataDifference: 822.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 75 SDtfs, 453 SDslu, 309 SDs, 0 SdLazy, 693 SolverSat, 108 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 390.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 319.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=594occurred in iteration=0, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 155.0ms AutomataMinimizationTime, 6 MinimizatonAttempts, 3089 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.9ms SsaConstructionTime, 36.8ms SatisfiabilityAnalysisTime, 381.5ms InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 187 SizeOfPredicates, 1 NumberOfNonLiveVariables, 21 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 4/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 31 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3447.9ms, OverallIterations: 9, TraceHistogramMax: 4, EmptinessCheckTime: 11.6ms, AutomataDifference: 1619.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 105.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 131 SDtfs, 779 SDslu, 579 SDs, 0 SdLazy, 1493 SolverSat, 202 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 617.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 420.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2969occurred in iteration=0, InterpolantAutomatonStates: 85, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1098.5ms AutomataMinimizationTime, 8 MinimizatonAttempts, 26554 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.9ms SsaConstructionTime, 19.2ms SatisfiabilityAnalysisTime, 318.0ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 262 SizeOfPredicates, 1 NumberOfNonLiveVariables, 21 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 15/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 36 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17201.1ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 33.6ms, AutomataDifference: 5763.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1346.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 179 SDtfs, 1486 SDslu, 830 SDs, 0 SdLazy, 2241 SolverSat, 366 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1077.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 511.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14844occurred in iteration=0, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9420.8ms AutomataMinimizationTime, 10 MinimizatonAttempts, 199133 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.5ms SsaConstructionTime, 16.0ms SatisfiabilityAnalysisTime, 318.8ms InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 328 SizeOfPredicates, 1 NumberOfNonLiveVariables, 21 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 11 InterpolantComputations, 9 PerfectInterpolantSequences, 20/22 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...