/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 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 20:35:42,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 20:35:42,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 20:35:42,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 20:35:42,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 20:35:42,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 20:35:42,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 20:35:42,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 20:35:42,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 20:35:42,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 20:35:42,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 20:35:42,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 20:35:42,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 20:35:42,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 20:35:42,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 20:35:42,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 20:35:42,758 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 20:35:42,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 20:35:42,759 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 20:35:42,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 20:35:42,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 20:35:42,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 20:35:42,761 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 20:35:42,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 20:35:42,761 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 20:35:42,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 20:35:42,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 20:35:42,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 20:35:42,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 20:35:42,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 20:35:42,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 20:35:42,762 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 20:35:42,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 20:35:42,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 20:35:42,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 20:35:42,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 20:35:42,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 20:35:42,763 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 20:35:42,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 20:35:42,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:35:42,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 20:35:42,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 20:35:42,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 20:35:42,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 20:35:42,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 20:35:42,763 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 20:35:42,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 20:35:42,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 20:35:42,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 20:35:42,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 20:35:42,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 20:35:43,000 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 20:35:43,001 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 20:35:43,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl [2021-03-10 20:35:43,002 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl' [2021-03-10 20:35:43,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 20:35:43,042 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 20:35:43,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 20:35:43,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 20:35:43,043 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 20:35:43,054 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 10.03 08:35:43" (1/1) ... [2021-03-10 20:35:43,058 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 10.03 08:35:43" (1/1) ... [2021-03-10 20:35:43,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 20:35:43,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 20:35:43,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 20:35:43,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 20:35:43,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:35:43" (1/1) ... [2021-03-10 20:35:43,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:35:43" (1/1) ... [2021-03-10 20:35:43,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:35:43" (1/1) ... [2021-03-10 20:35:43,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:35:43" (1/1) ... [2021-03-10 20:35:43,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:35:43" (1/1) ... [2021-03-10 20:35:43,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:35:43" (1/1) ... [2021-03-10 20:35:43,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:35:43" (1/1) ... [2021-03-10 20:35:43,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 20:35:43,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 20:35:43,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 20:35:43,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 20:35:43,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:35:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:35:43,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 20:35:43,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 20:35:43,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 20:35:43,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-03-10 20:35:43,136 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-03-10 20:35:43,136 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-03-10 20:35:43,136 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 20:35:43,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 20:35:43,223 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-03-10 20:35:43,224 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:35:43 BoogieIcfgContainer [2021-03-10 20:35:43,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 20:35:43,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 20:35:43,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 20:35:43,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 20:35:43,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:35:43" (1/2) ... [2021-03-10 20:35:43,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@531d31a1 and model type fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 08:35:43, skipping insertion in model container [2021-03-10 20:35:43,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:35:43" (2/2) ... [2021-03-10 20:35:43,232 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe.bpl [2021-03-10 20:35:43,236 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 20:35:43,236 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 20:35:43,238 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 20:35:43,239 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 20:35:43,255 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,255 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,255 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,256 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,260 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:35:43,270 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 20:35:43,283 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:35:43,283 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:35:43,283 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:35:43,283 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:35:43,283 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:35:43,284 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:35:43,284 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:35:43,284 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:35:43,289 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 10 transitions, 25 flow [2021-03-10 20:35:43,296 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) [2021-03-10 20:35:43,298 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) [2021-03-10 20:35:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-10 20:35:43,301 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:43,302 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-10 20:35:43,302 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-10 20:35:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:43,306 INFO L82 PathProgramCache]: Analyzing trace with hash 43134170, now seen corresponding path program 1 times [2021-03-10 20:35:43,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:43,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42192799] [2021-03-10 20:35:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:35:43,377 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:35:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:35:43,381 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:35:43,390 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:35:43,390 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:35:43,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 20:35:43,391 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:35:43,391 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-10 20:35:43,395 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,395 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,395 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,395 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,396 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,396 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,396 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,396 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,399 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:35:43,399 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 20:35:43,401 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:35:43,401 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:35:43,401 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:35:43,401 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:35:43,401 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:35:43,401 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:35:43,401 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:35:43,401 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:35:43,402 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2021-03-10 20:35:43,409 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) [2021-03-10 20:35:43,410 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) [2021-03-10 20:35:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-10 20:35:43,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:43,410 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-10 20:35:43,411 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:43,411 INFO L82 PathProgramCache]: Analyzing trace with hash 57452648, now seen corresponding path program 1 times [2021-03-10 20:35:43,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:43,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793922194] [2021-03-10 20:35:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:43,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793922194] [2021-03-10 20:35:43,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:43,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 20:35:43,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959828816] [2021-03-10 20:35:43,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 20:35:43,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:43,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 20:35:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 20:35:43,479 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) [2021-03-10 20:35:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:43,544 INFO L93 Difference]: Finished difference Result 112 states and 249 transitions. [2021-03-10 20:35:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 20:35:43,546 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 [2021-03-10 20:35:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:43,553 INFO L225 Difference]: With dead ends: 112 [2021-03-10 20:35:43,553 INFO L226 Difference]: Without dead ends: 103 [2021-03-10 20:35:43,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:35:43,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-03-10 20:35:43,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-03-10 20:35:43,580 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) [2021-03-10 20:35:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 229 transitions. [2021-03-10 20:35:43,588 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 229 transitions. Word has length 5 [2021-03-10 20:35:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:43,588 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 229 transitions. [2021-03-10 20:35:43,588 INFO L481 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) [2021-03-10 20:35:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 229 transitions. [2021-03-10 20:35:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:35:43,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:43,589 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-03-10 20:35:43,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 20:35:43,589 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:43,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:43,590 INFO L82 PathProgramCache]: Analyzing trace with hash -622629923, now seen corresponding path program 1 times [2021-03-10 20:35:43,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:43,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517912200] [2021-03-10 20:35:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:35:43,597 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:35:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:35:43,600 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:35:43,602 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:35:43,602 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:35:43,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 20:35:43,603 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:35:43,603 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-10 20:35:43,621 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,621 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,621 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,621 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,622 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,622 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,622 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,622 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,622 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,622 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,623 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,623 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:43,626 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:35:43,627 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-10 20:35:43,628 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:35:43,628 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:35:43,628 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:35:43,628 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:35:43,628 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:35:43,628 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:35:43,628 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:35:43,628 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:35:43,629 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 61 flow [2021-03-10 20:35:43,653 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) [2021-03-10 20:35:43,654 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) [2021-03-10 20:35:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-10 20:35:43,655 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:43,655 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-10 20:35:43,655 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:43,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:43,655 INFO L82 PathProgramCache]: Analyzing trace with hash 76542848, now seen corresponding path program 1 times [2021-03-10 20:35:43,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:43,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090626465] [2021-03-10 20:35:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:43,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090626465] [2021-03-10 20:35:43,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:43,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 20:35:43,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225699349] [2021-03-10 20:35:43,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 20:35:43,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:43,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 20:35:43,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 20:35:43,688 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) [2021-03-10 20:35:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:43,783 INFO L93 Difference]: Finished difference Result 584 states and 1771 transitions. [2021-03-10 20:35:43,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 20:35:43,786 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 [2021-03-10 20:35:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:43,797 INFO L225 Difference]: With dead ends: 584 [2021-03-10 20:35:43,797 INFO L226 Difference]: Without dead ends: 567 [2021-03-10 20:35:43,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:35:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-03-10 20:35:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-03-10 20:35:43,859 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) [2021-03-10 20:35:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1719 transitions. [2021-03-10 20:35:43,865 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1719 transitions. Word has length 5 [2021-03-10 20:35:43,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:43,865 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1719 transitions. [2021-03-10 20:35:43,865 INFO L481 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) [2021-03-10 20:35:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1719 transitions. [2021-03-10 20:35:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:35:43,866 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:43,866 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:43,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 20:35:43,866 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash 542941744, now seen corresponding path program 1 times [2021-03-10 20:35:43,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:43,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246351345] [2021-03-10 20:35:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:43,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246351345] [2021-03-10 20:35:43,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:43,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:35:43,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534305513] [2021-03-10 20:35:43,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:35:43,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:43,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:35:43,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:35:43,941 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) [2021-03-10 20:35:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:44,066 INFO L93 Difference]: Finished difference Result 1180 states and 3596 transitions. [2021-03-10 20:35:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 20:35:44,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-03-10 20:35:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:44,072 INFO L225 Difference]: With dead ends: 1180 [2021-03-10 20:35:44,073 INFO L226 Difference]: Without dead ends: 1180 [2021-03-10 20:35:44,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:35:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-03-10 20:35:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 560. [2021-03-10 20:35:44,092 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) [2021-03-10 20:35:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1695 transitions. [2021-03-10 20:35:44,094 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1695 transitions. Word has length 7 [2021-03-10 20:35:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:44,095 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 1695 transitions. [2021-03-10 20:35:44,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:35:44,095 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1695 transitions. [2021-03-10 20:35:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:35:44,095 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:44,095 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:44,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 20:35:44,096 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:44,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:44,096 INFO L82 PathProgramCache]: Analyzing trace with hash -339906921, now seen corresponding path program 1 times [2021-03-10 20:35:44,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:44,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624852477] [2021-03-10 20:35:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:44,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624852477] [2021-03-10 20:35:44,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339381077] [2021-03-10 20:35:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:35:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:44,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 20:35:44,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:35:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:44,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:35:44,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 20:35:44,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110132532] [2021-03-10 20:35:44,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 20:35:44,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:44,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 20:35:44,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 20:35:44,310 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) [2021-03-10 20:35:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:44,370 INFO L93 Difference]: Finished difference Result 636 states and 1874 transitions. [2021-03-10 20:35:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 20:35:44,371 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 [2021-03-10 20:35:44,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:44,374 INFO L225 Difference]: With dead ends: 636 [2021-03-10 20:35:44,375 INFO L226 Difference]: Without dead ends: 632 [2021-03-10 20:35:44,375 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:35:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-03-10 20:35:44,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 512. [2021-03-10 20:35:44,389 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) [2021-03-10 20:35:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1540 transitions. [2021-03-10 20:35:44,392 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1540 transitions. Word has length 8 [2021-03-10 20:35:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:44,394 INFO L480 AbstractCegarLoop]: Abstraction has 512 states and 1540 transitions. [2021-03-10 20:35:44,394 INFO L481 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) [2021-03-10 20:35:44,394 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1540 transitions. [2021-03-10 20:35:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:35:44,396 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:44,396 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:44,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-03-10 20:35:44,601 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:44,602 INFO L82 PathProgramCache]: Analyzing trace with hash -339906925, now seen corresponding path program 1 times [2021-03-10 20:35:44,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:44,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253472109] [2021-03-10 20:35:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:35:44,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253472109] [2021-03-10 20:35:44,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:44,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:35:44,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708299650] [2021-03-10 20:35:44,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:35:44,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:44,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:35:44,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:35:44,637 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) [2021-03-10 20:35:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:44,745 INFO L93 Difference]: Finished difference Result 1501 states and 4509 transitions. [2021-03-10 20:35:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 20:35:44,746 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 [2021-03-10 20:35:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:44,752 INFO L225 Difference]: With dead ends: 1501 [2021-03-10 20:35:44,752 INFO L226 Difference]: Without dead ends: 1492 [2021-03-10 20:35:44,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:35:44,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-10 20:35:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 551. [2021-03-10 20:35:44,769 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) [2021-03-10 20:35:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1659 transitions. [2021-03-10 20:35:44,771 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1659 transitions. Word has length 8 [2021-03-10 20:35:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:44,771 INFO L480 AbstractCegarLoop]: Abstraction has 551 states and 1659 transitions. [2021-03-10 20:35:44,771 INFO L481 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) [2021-03-10 20:35:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1659 transitions. [2021-03-10 20:35:44,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:35:44,772 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:44,772 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:44,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 20:35:44,772 INFO L428 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:44,772 INFO L82 PathProgramCache]: Analyzing trace with hash -348844225, now seen corresponding path program 2 times [2021-03-10 20:35:44,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:44,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604058493] [2021-03-10 20:35:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:35:44,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604058493] [2021-03-10 20:35:44,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:44,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:35:44,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36351700] [2021-03-10 20:35:44,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:35:44,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:44,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:35:44,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:35:44,799 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) [2021-03-10 20:35:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:44,926 INFO L93 Difference]: Finished difference Result 1316 states and 3968 transitions. [2021-03-10 20:35:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 20:35:44,927 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 [2021-03-10 20:35:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:44,932 INFO L225 Difference]: With dead ends: 1316 [2021-03-10 20:35:44,932 INFO L226 Difference]: Without dead ends: 1307 [2021-03-10 20:35:44,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 20:35:44,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-03-10 20:35:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 548. [2021-03-10 20:35:44,947 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) [2021-03-10 20:35:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1654 transitions. [2021-03-10 20:35:44,949 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1654 transitions. Word has length 8 [2021-03-10 20:35:44,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:44,949 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1654 transitions. [2021-03-10 20:35:44,949 INFO L481 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) [2021-03-10 20:35:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1654 transitions. [2021-03-10 20:35:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:35:44,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:44,950 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:44,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 20:35:44,950 INFO L428 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:44,950 INFO L82 PathProgramCache]: Analyzing trace with hash -348671245, now seen corresponding path program 3 times [2021-03-10 20:35:44,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:44,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467161843] [2021-03-10 20:35:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:44,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467161843] [2021-03-10 20:35:44,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:44,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 20:35:44,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292857670] [2021-03-10 20:35:44,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 20:35:44,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:44,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 20:35:44,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:35:44,981 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) [2021-03-10 20:35:45,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:45,204 INFO L93 Difference]: Finished difference Result 1131 states and 3400 transitions. [2021-03-10 20:35:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 20:35:45,204 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 [2021-03-10 20:35:45,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:45,209 INFO L225 Difference]: With dead ends: 1131 [2021-03-10 20:35:45,209 INFO L226 Difference]: Without dead ends: 1116 [2021-03-10 20:35:45,210 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 20:35:45,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-03-10 20:35:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 467. [2021-03-10 20:35:45,229 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) [2021-03-10 20:35:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1401 transitions. [2021-03-10 20:35:45,230 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1401 transitions. Word has length 8 [2021-03-10 20:35:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:45,231 INFO L480 AbstractCegarLoop]: Abstraction has 467 states and 1401 transitions. [2021-03-10 20:35:45,231 INFO L481 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) [2021-03-10 20:35:45,231 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1401 transitions. [2021-03-10 20:35:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-03-10 20:35:45,232 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:45,232 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:45,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 20:35:45,233 INFO L428 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2075805806, now seen corresponding path program 1 times [2021-03-10 20:35:45,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:45,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793983683] [2021-03-10 20:35:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:35:45,249 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:35:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:35:45,251 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:35:45,252 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:35:45,252 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:35:45,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 20:35:45,253 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:35:45,253 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-10 20:35:45,260 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,261 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,261 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,261 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,261 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,262 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,262 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,262 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,262 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,262 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,263 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,263 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,263 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,263 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,263 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,263 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:45,267 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:35:45,268 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-10 20:35:45,268 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:35:45,268 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:35:45,268 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:35:45,268 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:35:45,268 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:35:45,268 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:35:45,268 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:35:45,268 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:35:45,269 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-03-10 20:35:45,390 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) [2021-03-10 20:35:45,397 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) [2021-03-10 20:35:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-10 20:35:45,398 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:45,399 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-10 20:35:45,399 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:45,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:45,399 INFO L82 PathProgramCache]: Analyzing trace with hash 100404189, now seen corresponding path program 1 times [2021-03-10 20:35:45,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:45,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087093966] [2021-03-10 20:35:45,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:45,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087093966] [2021-03-10 20:35:45,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:45,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 20:35:45,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498289756] [2021-03-10 20:35:45,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 20:35:45,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:45,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 20:35:45,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 20:35:45,450 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) [2021-03-10 20:35:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:45,514 INFO L93 Difference]: Finished difference Result 2956 states and 11330 transitions. [2021-03-10 20:35:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 20:35:45,514 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 [2021-03-10 20:35:45,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:45,530 INFO L225 Difference]: With dead ends: 2956 [2021-03-10 20:35:45,531 INFO L226 Difference]: Without dead ends: 2923 [2021-03-10 20:35:45,531 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:35:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-03-10 20:35:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2923. [2021-03-10 20:35:45,618 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) [2021-03-10 20:35:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 11198 transitions. [2021-03-10 20:35:45,635 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 11198 transitions. Word has length 5 [2021-03-10 20:35:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:45,635 INFO L480 AbstractCegarLoop]: Abstraction has 2923 states and 11198 transitions. [2021-03-10 20:35:45,635 INFO L481 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) [2021-03-10 20:35:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 11198 transitions. [2021-03-10 20:35:45,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:35:45,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:45,637 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:45,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 20:35:45,637 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:45,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1998981745, now seen corresponding path program 1 times [2021-03-10 20:35:45,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:45,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460655393] [2021-03-10 20:35:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:45,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460655393] [2021-03-10 20:35:45,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:45,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:35:45,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443713016] [2021-03-10 20:35:45,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:35:45,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:45,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:35:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:35:45,675 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) [2021-03-10 20:35:45,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:45,829 INFO L93 Difference]: Finished difference Result 6688 states and 25812 transitions. [2021-03-10 20:35:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 20:35:45,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-03-10 20:35:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:45,893 INFO L225 Difference]: With dead ends: 6688 [2021-03-10 20:35:45,893 INFO L226 Difference]: Without dead ends: 6688 [2021-03-10 20:35:45,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:35:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2021-03-10 20:35:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 2913. [2021-03-10 20:35:46,027 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) [2021-03-10 20:35:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 11158 transitions. [2021-03-10 20:35:46,037 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 11158 transitions. Word has length 7 [2021-03-10 20:35:46,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:46,037 INFO L480 AbstractCegarLoop]: Abstraction has 2913 states and 11158 transitions. [2021-03-10 20:35:46,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:35:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 11158 transitions. [2021-03-10 20:35:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:35:46,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:46,038 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:46,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-10 20:35:46,038 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:46,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:46,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1838888163, now seen corresponding path program 1 times [2021-03-10 20:35:46,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:46,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088172206] [2021-03-10 20:35:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:46,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088172206] [2021-03-10 20:35:46,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652543532] [2021-03-10 20:35:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:35:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:46,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 20:35:46,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 20:35:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:46,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:35:46,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 20:35:46,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348867781] [2021-03-10 20:35:46,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 20:35:46,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:46,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 20:35:46,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 20:35:46,154 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) [2021-03-10 20:35:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:46,313 INFO L93 Difference]: Finished difference Result 3797 states and 14239 transitions. [2021-03-10 20:35:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 20:35:46,313 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 [2021-03-10 20:35:46,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:46,325 INFO L225 Difference]: With dead ends: 3797 [2021-03-10 20:35:46,325 INFO L226 Difference]: Without dead ends: 3793 [2021-03-10 20:35:46,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:35:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2021-03-10 20:35:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 2825. [2021-03-10 20:35:46,413 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) [2021-03-10 20:35:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 10809 transitions. [2021-03-10 20:35:46,421 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 10809 transitions. Word has length 8 [2021-03-10 20:35:46,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:46,421 INFO L480 AbstractCegarLoop]: Abstraction has 2825 states and 10809 transitions. [2021-03-10 20:35:46,421 INFO L481 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) [2021-03-10 20:35:46,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 10809 transitions. [2021-03-10 20:35:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:35:46,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:46,422 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:46,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 20:35:46,635 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:46,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:46,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1838888167, now seen corresponding path program 1 times [2021-03-10 20:35:46,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:46,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508931800] [2021-03-10 20:35:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:46,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508931800] [2021-03-10 20:35:46,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:46,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 20:35:46,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560805702] [2021-03-10 20:35:46,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 20:35:46,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 20:35:46,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:35:46,662 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) [2021-03-10 20:35:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:46,868 INFO L93 Difference]: Finished difference Result 6503 states and 24965 transitions. [2021-03-10 20:35:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 20:35:46,869 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 [2021-03-10 20:35:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:46,889 INFO L225 Difference]: With dead ends: 6503 [2021-03-10 20:35:46,889 INFO L226 Difference]: Without dead ends: 6488 [2021-03-10 20:35:46,889 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 20:35:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6488 states. [2021-03-10 20:35:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6488 to 2836. [2021-03-10 20:35:46,997 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) [2021-03-10 20:35:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 10824 transitions. [2021-03-10 20:35:47,005 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 10824 transitions. Word has length 8 [2021-03-10 20:35:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:47,005 INFO L480 AbstractCegarLoop]: Abstraction has 2836 states and 10824 transitions. [2021-03-10 20:35:47,005 INFO L481 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) [2021-03-10 20:35:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 10824 transitions. [2021-03-10 20:35:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:35:47,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:47,006 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:47,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-10 20:35:47,007 INFO L428 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:47,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1843846927, now seen corresponding path program 2 times [2021-03-10 20:35:47,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:47,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274803920] [2021-03-10 20:35:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:35:47,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274803920] [2021-03-10 20:35:47,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:47,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:35:47,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122381888] [2021-03-10 20:35:47,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:35:47,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:47,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:35:47,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:35:47,041 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) [2021-03-10 20:35:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:47,177 INFO L93 Difference]: Finished difference Result 7897 states and 30138 transitions. [2021-03-10 20:35:47,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 20:35:47,178 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 [2021-03-10 20:35:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:47,204 INFO L225 Difference]: With dead ends: 7897 [2021-03-10 20:35:47,204 INFO L226 Difference]: Without dead ends: 7888 [2021-03-10 20:35:47,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:35:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7888 states. [2021-03-10 20:35:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7888 to 2743. [2021-03-10 20:35:47,331 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) [2021-03-10 20:35:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 10492 transitions. [2021-03-10 20:35:47,339 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 10492 transitions. Word has length 8 [2021-03-10 20:35:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:47,339 INFO L480 AbstractCegarLoop]: Abstraction has 2743 states and 10492 transitions. [2021-03-10 20:35:47,339 INFO L481 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) [2021-03-10 20:35:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 10492 transitions. [2021-03-10 20:35:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-03-10 20:35:47,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:47,340 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:47,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-10 20:35:47,340 INFO L428 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:47,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1170789958, now seen corresponding path program 1 times [2021-03-10 20:35:47,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:47,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341460903] [2021-03-10 20:35:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:47,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341460903] [2021-03-10 20:35:47,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:47,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 20:35:47,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870722949] [2021-03-10 20:35:47,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 20:35:47,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:47,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 20:35:47,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:35:47,387 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) [2021-03-10 20:35:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:47,551 INFO L93 Difference]: Finished difference Result 6277 states and 24190 transitions. [2021-03-10 20:35:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 20:35:47,551 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 [2021-03-10 20:35:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:47,567 INFO L225 Difference]: With dead ends: 6277 [2021-03-10 20:35:47,567 INFO L226 Difference]: Without dead ends: 6277 [2021-03-10 20:35:47,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 20:35:47,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2021-03-10 20:35:47,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 2736. [2021-03-10 20:35:47,683 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) [2021-03-10 20:35:47,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 10461 transitions. [2021-03-10 20:35:47,692 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 10461 transitions. Word has length 9 [2021-03-10 20:35:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:47,693 INFO L480 AbstractCegarLoop]: Abstraction has 2736 states and 10461 transitions. [2021-03-10 20:35:47,693 INFO L481 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) [2021-03-10 20:35:47,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 10461 transitions. [2021-03-10 20:35:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 20:35:47,693 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:47,693 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:47,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-10 20:35:47,693 INFO L428 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:47,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:47,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1934750506, now seen corresponding path program 1 times [2021-03-10 20:35:47,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:47,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808318098] [2021-03-10 20:35:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:47,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808318098] [2021-03-10 20:35:47,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:47,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 20:35:47,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443458313] [2021-03-10 20:35:47,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 20:35:47,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:47,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 20:35:47,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 20:35:47,734 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) [2021-03-10 20:35:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:47,951 INFO L93 Difference]: Finished difference Result 6137 states and 23593 transitions. [2021-03-10 20:35:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 20:35:47,951 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 [2021-03-10 20:35:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:47,969 INFO L225 Difference]: With dead ends: 6137 [2021-03-10 20:35:47,969 INFO L226 Difference]: Without dead ends: 6137 [2021-03-10 20:35:47,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-03-10 20:35:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6137 states. [2021-03-10 20:35:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6137 to 2750. [2021-03-10 20:35:48,078 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) [2021-03-10 20:35:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 10496 transitions. [2021-03-10 20:35:48,086 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 10496 transitions. Word has length 10 [2021-03-10 20:35:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:48,086 INFO L480 AbstractCegarLoop]: Abstraction has 2750 states and 10496 transitions. [2021-03-10 20:35:48,086 INFO L481 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) [2021-03-10 20:35:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 10496 transitions. [2021-03-10 20:35:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 20:35:48,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:48,087 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:48,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-10 20:35:48,088 INFO L428 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:48,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1884882076, now seen corresponding path program 2 times [2021-03-10 20:35:48,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:48,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412853768] [2021-03-10 20:35:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:35:48,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412853768] [2021-03-10 20:35:48,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:48,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 20:35:48,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674390307] [2021-03-10 20:35:48,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 20:35:48,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:48,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 20:35:48,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:35:48,134 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) [2021-03-10 20:35:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:48,323 INFO L93 Difference]: Finished difference Result 8764 states and 33656 transitions. [2021-03-10 20:35:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 20:35:48,324 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 [2021-03-10 20:35:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:48,344 INFO L225 Difference]: With dead ends: 8764 [2021-03-10 20:35:48,345 INFO L226 Difference]: Without dead ends: 8764 [2021-03-10 20:35:48,346 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 20:35:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2021-03-10 20:35:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 2678. [2021-03-10 20:35:48,467 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) [2021-03-10 20:35:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 10217 transitions. [2021-03-10 20:35:48,474 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 10217 transitions. Word has length 10 [2021-03-10 20:35:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:48,474 INFO L480 AbstractCegarLoop]: Abstraction has 2678 states and 10217 transitions. [2021-03-10 20:35:48,474 INFO L481 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) [2021-03-10 20:35:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 10217 transitions. [2021-03-10 20:35:48,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 20:35:48,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:48,475 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:48,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-10 20:35:48,475 INFO L428 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:48,475 INFO L82 PathProgramCache]: Analyzing trace with hash -152320659, now seen corresponding path program 1 times [2021-03-10 20:35:48,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:48,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464535882] [2021-03-10 20:35:48,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:35:48,479 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:35:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:35:48,484 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:35:48,488 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:35:48,488 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:35:48,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-10 20:35:48,488 WARN L342 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:35:48,488 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-03-10 20:35:48,492 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,492 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,492 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,493 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,493 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,493 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,493 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,493 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,493 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,493 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,493 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,493 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,493 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,496 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,496 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,496 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,497 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,497 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,497 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,497 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:35:48,500 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:35:48,500 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-03-10 20:35:48,502 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:35:48,502 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:35:48,502 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:35:48,502 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:35:48,502 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:35:48,502 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:35:48,502 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:35:48,502 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:35:48,504 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 30 transitions, 105 flow [2021-03-10 20:35:49,791 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) [2021-03-10 20:35:49,815 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) [2021-03-10 20:35:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-10 20:35:49,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:49,815 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-10 20:35:49,815 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:49,816 INFO L82 PathProgramCache]: Analyzing trace with hash 129037055, now seen corresponding path program 1 times [2021-03-10 20:35:49,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:49,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798047636] [2021-03-10 20:35:49,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:49,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798047636] [2021-03-10 20:35:49,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:49,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 20:35:49,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779642165] [2021-03-10 20:35:49,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 20:35:49,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:49,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 20:35:49,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 20:35:49,854 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) [2021-03-10 20:35:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:49,977 INFO L93 Difference]: Finished difference Result 14828 states and 68686 transitions. [2021-03-10 20:35:49,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 20:35:49,978 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 [2021-03-10 20:35:49,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:50,027 INFO L225 Difference]: With dead ends: 14828 [2021-03-10 20:35:50,027 INFO L226 Difference]: Without dead ends: 14763 [2021-03-10 20:35:50,027 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:35:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14763 states. [2021-03-10 20:35:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14763 to 14763. [2021-03-10 20:35:50,711 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) [2021-03-10 20:35:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14763 states to 14763 states and 68362 transitions. [2021-03-10 20:35:50,766 INFO L78 Accepts]: Start accepts. Automaton has 14763 states and 68362 transitions. Word has length 5 [2021-03-10 20:35:50,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:50,766 INFO L480 AbstractCegarLoop]: Abstraction has 14763 states and 68362 transitions. [2021-03-10 20:35:50,766 INFO L481 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) [2021-03-10 20:35:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 14763 states and 68362 transitions. [2021-03-10 20:35:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:35:50,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:50,766 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:50,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-10 20:35:50,767 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash -549477417, now seen corresponding path program 1 times [2021-03-10 20:35:50,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:50,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88006389] [2021-03-10 20:35:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:50,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88006389] [2021-03-10 20:35:50,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:50,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:35:50,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909715751] [2021-03-10 20:35:50,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:35:50,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:50,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:35:50,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:35:50,795 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) [2021-03-10 20:35:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:51,220 INFO L93 Difference]: Finished difference Result 35580 states and 165794 transitions. [2021-03-10 20:35:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 20:35:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-03-10 20:35:51,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:51,463 INFO L225 Difference]: With dead ends: 35580 [2021-03-10 20:35:51,463 INFO L226 Difference]: Without dead ends: 35580 [2021-03-10 20:35:51,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:35:51,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35580 states. [2021-03-10 20:35:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35580 to 14750. [2021-03-10 20:35:52,454 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) [2021-03-10 20:35:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14750 states to 14750 states and 68303 transitions. [2021-03-10 20:35:52,502 INFO L78 Accepts]: Start accepts. Automaton has 14750 states and 68303 transitions. Word has length 7 [2021-03-10 20:35:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:52,502 INFO L480 AbstractCegarLoop]: Abstraction has 14750 states and 68303 transitions. [2021-03-10 20:35:52,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:35:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 14750 states and 68303 transitions. [2021-03-10 20:35:52,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:35:52,503 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:52,503 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:52,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-03-10 20:35:52,503 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:52,503 INFO L82 PathProgramCache]: Analyzing trace with hash 147218695, now seen corresponding path program 1 times [2021-03-10 20:35:52,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:52,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800660298] [2021-03-10 20:35:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:52,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800660298] [2021-03-10 20:35:52,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815481739] [2021-03-10 20:35:52,528 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) [2021-03-10 20:35:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:52,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 20:35:52,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 20:35:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:52,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 20:35:52,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 20:35:52,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599727109] [2021-03-10 20:35:52,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 20:35:52,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:52,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 20:35:52,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 20:35:52,611 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) [2021-03-10 20:35:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:52,785 INFO L93 Difference]: Finished difference Result 20190 states and 91829 transitions. [2021-03-10 20:35:52,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 20:35:52,786 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 [2021-03-10 20:35:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:52,850 INFO L225 Difference]: With dead ends: 20190 [2021-03-10 20:35:52,850 INFO L226 Difference]: Without dead ends: 20186 [2021-03-10 20:35:52,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:35:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20186 states. [2021-03-10 20:35:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20186 to 14610. [2021-03-10 20:35:53,668 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) [2021-03-10 20:35:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14610 states to 14610 states and 67647 transitions. [2021-03-10 20:35:53,715 INFO L78 Accepts]: Start accepts. Automaton has 14610 states and 67647 transitions. Word has length 8 [2021-03-10 20:35:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:53,715 INFO L480 AbstractCegarLoop]: Abstraction has 14610 states and 67647 transitions. [2021-03-10 20:35:53,715 INFO L481 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) [2021-03-10 20:35:53,716 INFO L276 IsEmpty]: Start isEmpty. Operand 14610 states and 67647 transitions. [2021-03-10 20:35:53,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:35:53,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:53,716 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:53,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 20:35:53,931 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:53,931 INFO L82 PathProgramCache]: Analyzing trace with hash 147218699, now seen corresponding path program 1 times [2021-03-10 20:35:53,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:53,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192552415] [2021-03-10 20:35:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:35:53,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192552415] [2021-03-10 20:35:53,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:53,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:35:53,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280285868] [2021-03-10 20:35:53,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:35:53,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:53,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:35:53,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:35:53,954 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) [2021-03-10 20:35:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:54,265 INFO L93 Difference]: Finished difference Result 41197 states and 190392 transitions. [2021-03-10 20:35:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 20:35:54,266 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 [2021-03-10 20:35:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:54,405 INFO L225 Difference]: With dead ends: 41197 [2021-03-10 20:35:54,405 INFO L226 Difference]: Without dead ends: 41188 [2021-03-10 20:35:54,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 20:35:54,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41188 states. [2021-03-10 20:35:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41188 to 14685. [2021-03-10 20:35:55,385 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) [2021-03-10 20:35:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14685 states to 14685 states and 67964 transitions. [2021-03-10 20:35:55,435 INFO L78 Accepts]: Start accepts. Automaton has 14685 states and 67964 transitions. Word has length 8 [2021-03-10 20:35:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:55,436 INFO L480 AbstractCegarLoop]: Abstraction has 14685 states and 67964 transitions. [2021-03-10 20:35:55,436 INFO L481 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) [2021-03-10 20:35:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 14685 states and 67964 transitions. [2021-03-10 20:35:55,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:35:55,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:55,436 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:55,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-03-10 20:35:55,436 INFO L428 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:55,437 INFO L82 PathProgramCache]: Analyzing trace with hash 145431239, now seen corresponding path program 2 times [2021-03-10 20:35:55,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:55,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630739068] [2021-03-10 20:35:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:35:55,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630739068] [2021-03-10 20:35:55,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:55,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:35:55,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634081340] [2021-03-10 20:35:55,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 20:35:55,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:55,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 20:35:55,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 20:35:55,459 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) [2021-03-10 20:35:55,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:55,970 INFO L93 Difference]: Finished difference Result 36030 states and 167688 transitions. [2021-03-10 20:35:55,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 20:35:55,970 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 [2021-03-10 20:35:55,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:56,158 INFO L225 Difference]: With dead ends: 36030 [2021-03-10 20:35:56,158 INFO L226 Difference]: Without dead ends: 36021 [2021-03-10 20:35:56,158 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 20:35:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36021 states. [2021-03-10 20:35:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36021 to 14682. [2021-03-10 20:35:56,933 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) [2021-03-10 20:35:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14682 states to 14682 states and 67959 transitions. [2021-03-10 20:35:57,092 INFO L78 Accepts]: Start accepts. Automaton has 14682 states and 67959 transitions. Word has length 8 [2021-03-10 20:35:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:57,092 INFO L480 AbstractCegarLoop]: Abstraction has 14682 states and 67959 transitions. [2021-03-10 20:35:57,092 INFO L481 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) [2021-03-10 20:35:57,092 INFO L276 IsEmpty]: Start isEmpty. Operand 14682 states and 67959 transitions. [2021-03-10 20:35:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:35:57,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:57,093 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:57,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-03-10 20:35:57,093 INFO L428 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash 146065499, now seen corresponding path program 3 times [2021-03-10 20:35:57,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:57,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917139331] [2021-03-10 20:35:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:57,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917139331] [2021-03-10 20:35:57,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:57,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 20:35:57,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169626629] [2021-03-10 20:35:57,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 20:35:57,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:57,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 20:35:57,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:35:57,147 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) [2021-03-10 20:35:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:57,518 INFO L93 Difference]: Finished difference Result 35343 states and 164489 transitions. [2021-03-10 20:35:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 20:35:57,519 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 [2021-03-10 20:35:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:57,633 INFO L225 Difference]: With dead ends: 35343 [2021-03-10 20:35:57,633 INFO L226 Difference]: Without dead ends: 35328 [2021-03-10 20:35:57,633 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 20:35:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35328 states. [2021-03-10 20:35:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35328 to 14479. [2021-03-10 20:35:58,626 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) [2021-03-10 20:35:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14479 states to 14479 states and 67042 transitions. [2021-03-10 20:35:58,671 INFO L78 Accepts]: Start accepts. Automaton has 14479 states and 67042 transitions. Word has length 8 [2021-03-10 20:35:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:58,672 INFO L480 AbstractCegarLoop]: Abstraction has 14479 states and 67042 transitions. [2021-03-10 20:35:58,672 INFO L481 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) [2021-03-10 20:35:58,672 INFO L276 IsEmpty]: Start isEmpty. Operand 14479 states and 67042 transitions. [2021-03-10 20:35:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-03-10 20:35:58,672 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:58,672 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:35:58,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-03-10 20:35:58,672 INFO L428 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:58,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:58,672 INFO L82 PathProgramCache]: Analyzing trace with hash 233022064, now seen corresponding path program 1 times [2021-03-10 20:35:58,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:58,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076722024] [2021-03-10 20:35:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:35:58,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076722024] [2021-03-10 20:35:58,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:58,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 20:35:58,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889266760] [2021-03-10 20:35:58,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 20:35:58,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 20:35:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:35:58,702 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) [2021-03-10 20:35:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:59,057 INFO L93 Difference]: Finished difference Result 37319 states and 174666 transitions. [2021-03-10 20:35:59,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 20:35:59,057 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 [2021-03-10 20:35:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:59,181 INFO L225 Difference]: With dead ends: 37319 [2021-03-10 20:35:59,181 INFO L226 Difference]: Without dead ends: 37319 [2021-03-10 20:35:59,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 20:35:59,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37319 states. [2021-03-10 20:36:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37319 to 14469. [2021-03-10 20:36:00,139 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) [2021-03-10 20:36:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14469 states to 14469 states and 66992 transitions. [2021-03-10 20:36:00,185 INFO L78 Accepts]: Start accepts. Automaton has 14469 states and 66992 transitions. Word has length 9 [2021-03-10 20:36:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:36:00,185 INFO L480 AbstractCegarLoop]: Abstraction has 14469 states and 66992 transitions. [2021-03-10 20:36:00,185 INFO L481 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) [2021-03-10 20:36:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 14469 states and 66992 transitions. [2021-03-10 20:36:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 20:36:00,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:36:00,185 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:36:00,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-03-10 20:36:00,185 INFO L428 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:36:00,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:36:00,186 INFO L82 PathProgramCache]: Analyzing trace with hash -256908636, now seen corresponding path program 1 times [2021-03-10 20:36:00,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:36:00,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76109490] [2021-03-10 20:36:00,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:36:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:36:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:36:00,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76109490] [2021-03-10 20:36:00,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:36:00,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 20:36:00,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206591651] [2021-03-10 20:36:00,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 20:36:00,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:36:00,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 20:36:00,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:36:00,213 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) [2021-03-10 20:36:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:36:00,604 INFO L93 Difference]: Finished difference Result 49141 states and 228612 transitions. [2021-03-10 20:36:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 20:36:00,605 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 [2021-03-10 20:36:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:36:00,771 INFO L225 Difference]: With dead ends: 49141 [2021-03-10 20:36:00,771 INFO L226 Difference]: Without dead ends: 49141 [2021-03-10 20:36:00,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 20:36:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49141 states. [2021-03-10 20:36:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49141 to 14595. [2021-03-10 20:36:02,054 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) [2021-03-10 20:36:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14595 states to 14595 states and 67568 transitions. [2021-03-10 20:36:02,101 INFO L78 Accepts]: Start accepts. Automaton has 14595 states and 67568 transitions. Word has length 10 [2021-03-10 20:36:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:36:02,101 INFO L480 AbstractCegarLoop]: Abstraction has 14595 states and 67568 transitions. [2021-03-10 20:36:02,101 INFO L481 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) [2021-03-10 20:36:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 14595 states and 67568 transitions. [2021-03-10 20:36:02,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 20:36:02,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:36:02,101 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:36:02,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-03-10 20:36:02,102 INFO L428 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:36:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:36:02,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1366921296, now seen corresponding path program 2 times [2021-03-10 20:36:02,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:36:02,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372337046] [2021-03-10 20:36:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:36:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:36:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:36:02,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372337046] [2021-03-10 20:36:02,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:36:02,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 20:36:02,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169043079] [2021-03-10 20:36:02,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 20:36:02,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:36:02,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 20:36:02,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 20:36:02,128 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) [2021-03-10 20:36:02,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:36:02,514 INFO L93 Difference]: Finished difference Result 38423 states and 179905 transitions. [2021-03-10 20:36:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 20:36:02,514 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 [2021-03-10 20:36:02,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:36:02,641 INFO L225 Difference]: With dead ends: 38423 [2021-03-10 20:36:02,641 INFO L226 Difference]: Without dead ends: 38423 [2021-03-10 20:36:02,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-03-10 20:36:03,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38423 states. [2021-03-10 20:36:03,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38423 to 14589. [2021-03-10 20:36:03,677 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) [2021-03-10 20:36:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14589 states to 14589 states and 67552 transitions. [2021-03-10 20:36:03,722 INFO L78 Accepts]: Start accepts. Automaton has 14589 states and 67552 transitions. Word has length 10 [2021-03-10 20:36:03,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:36:03,722 INFO L480 AbstractCegarLoop]: Abstraction has 14589 states and 67552 transitions. [2021-03-10 20:36:03,722 INFO L481 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) [2021-03-10 20:36:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 14589 states and 67552 transitions. [2021-03-10 20:36:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 20:36:03,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:36:03,722 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:36:03,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-03-10 20:36:03,722 INFO L428 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:36:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:36:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1366258206, now seen corresponding path program 3 times [2021-03-10 20:36:03,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:36:03,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126207115] [2021-03-10 20:36:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:36:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:36:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:36:03,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126207115] [2021-03-10 20:36:03,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:36:03,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 20:36:03,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198530063] [2021-03-10 20:36:03,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 20:36:03,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:36:03,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 20:36:03,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 20:36:03,754 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) [2021-03-10 20:36:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:36:04,158 INFO L93 Difference]: Finished difference Result 37171 states and 173891 transitions. [2021-03-10 20:36:04,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 20:36:04,159 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 [2021-03-10 20:36:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:36:04,282 INFO L225 Difference]: With dead ends: 37171 [2021-03-10 20:36:04,282 INFO L226 Difference]: Without dead ends: 37171 [2021-03-10 20:36:04,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-03-10 20:36:04,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37171 states. [2021-03-10 20:36:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37171 to 14365. [2021-03-10 20:36:05,210 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) [2021-03-10 20:36:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14365 states to 14365 states and 66479 transitions. [2021-03-10 20:36:05,259 INFO L78 Accepts]: Start accepts. Automaton has 14365 states and 66479 transitions. Word has length 10 [2021-03-10 20:36:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:36:05,259 INFO L480 AbstractCegarLoop]: Abstraction has 14365 states and 66479 transitions. [2021-03-10 20:36:05,259 INFO L481 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) [2021-03-10 20:36:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 14365 states and 66479 transitions. [2021-03-10 20:36:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 20:36:05,260 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:36:05,260 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:36:05,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-03-10 20:36:05,260 INFO L428 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:36:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:36:05,260 INFO L82 PathProgramCache]: Analyzing trace with hash 630577724, now seen corresponding path program 1 times [2021-03-10 20:36:05,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:36:05,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508835199] [2021-03-10 20:36:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:36:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:36:05,263 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:36:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:36:05,264 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:36:05,266 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:36:05,266 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:36:05,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-03-10 20:36:05,275 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 08:36:05 BasicIcfg [2021-03-10 20:36:05,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 20:36:05,275 INFO L168 Benchmark]: Toolchain (without parser) took 22236.35 ms. Allocated memory was 320.9 MB in the beginning and 12.2 GB in the end (delta: 11.9 GB). Free memory was 300.9 MB in the beginning and 10.0 GB in the end (delta: -9.7 GB). Peak memory consumption was 2.2 GB. Max. memory is 16.0 GB. [2021-03-10 20:36:05,275 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 320.9 MB. Free memory was 302.0 MB in the beginning and 301.9 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:36:05,275 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.80 ms. Allocated memory is still 320.9 MB. Free memory was 300.5 MB in the beginning and 299.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:36:05,275 INFO L168 Benchmark]: Boogie Preprocessor took 12.28 ms. Allocated memory is still 320.9 MB. Free memory was 299.0 MB in the beginning and 298.1 MB in the end (delta: 913.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:36:05,275 INFO L168 Benchmark]: RCFGBuilder took 145.66 ms. Allocated memory is still 320.9 MB. Free memory was 298.0 MB in the beginning and 289.4 MB in the end (delta: 8.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-10 20:36:05,276 INFO L168 Benchmark]: TraceAbstraction took 22049.13 ms. Allocated memory was 320.9 MB in the beginning and 12.2 GB in the end (delta: 11.9 GB). Free memory was 289.0 MB in the beginning and 10.0 GB in the end (delta: -9.7 GB). Peak memory consumption was 2.2 GB. Max. memory is 16.0 GB. [2021-03-10 20:36:05,276 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 320.9 MB. Free memory was 302.0 MB in the beginning and 301.9 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.80 ms. Allocated memory is still 320.9 MB. Free memory was 300.5 MB in the beginning and 299.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.28 ms. Allocated memory is still 320.9 MB. Free memory was 299.0 MB in the beginning and 298.1 MB in the end (delta: 913.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 145.66 ms. Allocated memory is still 320.9 MB. Free memory was 298.0 MB in the beginning and 289.4 MB in the end (delta: 8.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 22049.13 ms. Allocated memory was 320.9 MB in the beginning and 12.2 GB in the end (delta: 11.9 GB). Free memory was 289.0 MB in the beginning and 10.0 GB in the end (delta: -9.7 GB). Peak memory consumption was 2.2 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 CFG has 2 procedures, 10 locations, 1 error locations. Started 5 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 21920.8ms, OverallIterations: 30, TraceHistogramMax: 4, EmptinessCheckTime: 49.9ms, AutomataDifference: 7205.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1457.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 393 SDtfs, 2739 SDslu, 1742 SDs, 0 SdLazy, 4464 SolverSat, 681 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2005.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 289 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1147.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14844occurred in iteration=0, InterpolantAutomatonStates: 264, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 11173.0ms AutomataMinimizationTime, 25 MinimizatonAttempts, 228776 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 21.4ms SsaConstructionTime, 96.7ms SatisfiabilityAnalysisTime, 987.2ms InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 193 ConstructedInterpolants, 0 QuantifiedInterpolants, 791 SizeOfPredicates, 3 NumberOfNonLiveVariables, 63 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 28 InterpolantComputations, 22 PerfectInterpolantSequences, 39/45 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...