/usr/bin/java -Xmx15000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/threadmodular/regression/bluetooth-better/ThreadModularVerifier.Settings.epf -tc ../../../trunk/examples/threadmodular/regression/ThreadModularUniHorn.xml -i ../../../trunk/examples/threadmodular/regression/bluetooth-better/bluetooth-better.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.sleep-threadmodular-5ab1b01-m [2023-07-03 22:46:54,246 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-07-03 22:46:54,291 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/bluetooth-better/ThreadModularVerifier.Settings.epf [2023-07-03 22:46:54,298 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-07-03 22:46:54,299 INFO L135 SettingsManager]: Preferences of ChcSolver differ from their defaults: [2023-07-03 22:46:54,300 INFO L137 SettingsManager]: * Produce UNSAT core if query is UNSAT=true [2023-07-03 22:46:54,300 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-07-03 22:46:54,300 INFO L137 SettingsManager]: * Size of a code block=OneNontrivialStatement [2023-07-03 22:46:54,301 INFO L137 SettingsManager]: * Add additional assume for each assert=false [2023-07-03 22:46:54,302 INFO L135 SettingsManager]: Preferences of IcfgToChc differ from their defaults: [2023-07-03 22:46:54,302 INFO L137 SettingsManager]: * Specification mode=ASSERT_VIOLATIONS [2023-07-03 22:46:54,302 INFO L137 SettingsManager]: * Thread-Modular Proof Level=1 [2023-07-03 22:46:54,303 INFO L137 SettingsManager]: * Single-instance threads=server [2023-07-03 22:46:54,303 INFO L137 SettingsManager]: * Conditional Independence=PRECOMPUTED_CONDITIONS [2023-07-03 22:46:54,304 INFO L135 SettingsManager]: Preferences of ChcSmtPrinter differ from their defaults: [2023-07-03 22:46:54,304 INFO L137 SettingsManager]: * Save file in source directory=true [2023-07-03 22:46:54,304 INFO L137 SettingsManager]: * Use automatic naming=true [2023-07-03 22:46:54,305 INFO L137 SettingsManager]: * File name=CHC_conditional 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-07-03 22:46:54,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-07-03 22:46:54,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-07-03 22:46:54,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-07-03 22:46:54,527 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-07-03 22:46:54,531 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-07-03 22:46:54,534 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/bluetooth-better/bluetooth-better.bpl [2023-07-03 22:46:54,534 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/bluetooth-better/bluetooth-better.bpl' [2023-07-03 22:46:54,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-07-03 22:46:54,571 INFO L133 ToolchainWalker]: Walking toolchain with 8 elements. [2023-07-03 22:46:54,572 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:46:54,572 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:46:54,573 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:46:54,592 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,613 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,613 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,615 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,621 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,640 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,650 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,650 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:46:54,672 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:46:54,672 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:46:54,673 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:46:54,674 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/1) ... [2023-07-03 22:46:54,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:46:54,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:46:54,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-07-03 22:46:54,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-07-03 22:46:54,750 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-07-03 22:46:54,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-07-03 22:46:54,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-07-03 22:46:54,757 INFO L124 BoogieDeclarations]: Specification and implementation of procedure server given in one single declaration [2023-07-03 22:46:54,757 INFO L130 BoogieDeclarations]: Found specification of procedure server [2023-07-03 22:46:54,758 INFO L138 BoogieDeclarations]: Found implementation of procedure server [2023-07-03 22:46:54,814 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:46:54,816 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:46:54,820 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-07-03 22:46:54,860 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-07-03 22:46:54,878 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:46:54,915 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-07-03 22:46:54,916 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:46:54,918 INFO L201 PluginConnector]: Adding new model bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:46:54 BoogieIcfgContainer [2023-07-03 22:46:54,918 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:46:54,922 INFO L112 PluginConnector]: ------------------------IcfgToChc---------------------------- [2023-07-03 22:46:54,922 INFO L270 PluginConnector]: Initializing IcfgToChc... [2023-07-03 22:46:54,922 INFO L274 PluginConnector]: IcfgToChc initialized [2023-07-03 22:46:54,924 INFO L184 PluginConnector]: Executing the observer IcfgToChcObserver from plugin IcfgToChc for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:46:54" (1/1) ... [2023-07-03 22:47:00,389 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:00,390 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume true;' is: true [2023-07-03 22:47:00,397 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume true;' is: true [2023-07-03 22:47:00,409 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume !stoppingFlag;pendingIo := pendingIo + 1;' is: true [2023-07-03 22:47:00,417 INFO L180 IndependenceChecker]: instantiated independence condition for 'stoppingFlag := true;' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:00,423 INFO L180 IndependenceChecker]: instantiated independence condition for 'stoppingFlag := true;' and 'assume true;' is: true [2023-07-03 22:47:00,425 INFO L180 IndependenceChecker]: instantiated independence condition for 'stoppingFlag := true;' and 'assume true;' is: true [2023-07-03 22:47:00,443 INFO L180 IndependenceChecker]: instantiated independence condition for 'stoppingFlag := true;' and 'assume !stoppingFlag;pendingIo := pendingIo + 1;' is: true [2023-07-03 22:47:00,581 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:00,595 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'assume true;' is: true [2023-07-03 22:47:00,615 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'assume true;' is: true [2023-07-03 22:47:00,918 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'assume !stoppingFlag;pendingIo := pendingIo + 1;' is: (and (not (= pendingIo 1)) (not (= pendingIo 0))) [2023-07-03 22:47:00,925 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume stoppingEvent;' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:00,932 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume stoppingEvent;' and 'assume true;' is: true [2023-07-03 22:47:00,933 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume stoppingEvent;' and 'assume true;' is: true [2023-07-03 22:47:00,936 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume stoppingEvent;' and 'assume !stoppingFlag;pendingIo := pendingIo + 1;' is: true [2023-07-03 22:47:00,954 INFO L180 IndependenceChecker]: instantiated independence condition for 'stopped := true;' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:00,957 INFO L180 IndependenceChecker]: instantiated independence condition for 'stopped := true;' and 'assume true;' is: true [2023-07-03 22:47:00,958 INFO L180 IndependenceChecker]: instantiated independence condition for 'stopped := true;' and 'assume true;' is: true [2023-07-03 22:47:00,978 INFO L180 IndependenceChecker]: instantiated independence condition for 'stopped := true;' and 'assume !stoppingFlag;pendingIo := pendingIo + 1;' is: true [2023-07-03 22:47:00,982 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:00,986 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:47:00,987 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:47:00,990 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume !stoppingFlag;pendingIo := pendingIo + 1;' is: true [2023-07-03 22:47:01,005 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume true;' is: true [2023-07-03 22:47:01,007 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'stopped := true;' is: true [2023-07-03 22:47:01,008 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'stoppingFlag := true;' is: true [2023-07-03 22:47:01,021 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:01,022 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume stoppingEvent;' is: true [2023-07-03 22:47:01,047 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:01,048 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume true;' is: true [2023-07-03 22:47:01,060 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume true;' is: true [2023-07-03 22:47:01,063 INFO L180 IndependenceChecker]: instantiated independence condition for '<[ dummy edge: assume true; ]>' and 'assume !stoppingFlag;pendingIo := pendingIo + 1;' is: true [2023-07-03 22:47:01,068 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !stoppingFlag;pendingIo := pendingIo + 1;' and 'assume true;' is: true [2023-07-03 22:47:01,071 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !stoppingFlag;pendingIo := pendingIo + 1;' and 'stopped := true;' is: true [2023-07-03 22:47:01,085 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !stoppingFlag;pendingIo := pendingIo + 1;' and 'stoppingFlag := true;' is: false [2023-07-03 22:47:01,240 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !stoppingFlag;pendingIo := pendingIo + 1;' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: (and (not (= pendingIo 1)) (not (= pendingIo 0))) [2023-07-03 22:47:01,257 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !stoppingFlag;pendingIo := pendingIo + 1;' and 'assume stoppingEvent;' is: true [2023-07-03 22:47:01,411 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !stoppingFlag;pendingIo := pendingIo + 1;' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: (and (not (= pendingIo 1)) (not (= pendingIo 0))) [2023-07-03 22:47:01,413 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !stoppingFlag;pendingIo := pendingIo + 1;' and 'assume true;' is: true [2023-07-03 22:47:01,417 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !stoppingFlag;pendingIo := pendingIo + 1;' and 'assume true;' is: true [2023-07-03 22:47:01,419 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume !stoppingFlag;pendingIo := pendingIo + 1;' and 'assume !stoppingFlag;pendingIo := pendingIo + 1;' is: true [2023-07-03 22:47:01,423 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:47:01,424 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'stopped := true;' is: true [2023-07-03 22:47:01,425 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'stoppingFlag := true;' is: true [2023-07-03 22:47:01,427 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:01,428 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume stoppingEvent;' is: true [2023-07-03 22:47:01,434 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:01,435 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:47:01,435 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:47:01,438 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume !stoppingFlag;pendingIo := pendingIo + 1;' is: true [2023-07-03 22:47:01,443 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'assume true;' is: true [2023-07-03 22:47:01,445 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'stopped := true;' is: true [2023-07-03 22:47:01,451 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'stoppingFlag := true;' is: true [2023-07-03 22:47:01,456 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:01,491 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'assume stoppingEvent;' is: (not (= pendingIo 1)) [2023-07-03 22:47:01,497 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:01,499 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'assume true;' is: true [2023-07-03 22:47:01,501 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'assume true;' is: true [2023-07-03 22:47:01,626 INFO L180 IndependenceChecker]: instantiated independence condition for 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' and 'assume !stoppingFlag;pendingIo := pendingIo + 1;' is: (and (not (= pendingIo 1)) (not (= pendingIo 0))) [2023-07-03 22:47:01,629 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:47:01,630 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'stopped := true;' is: true [2023-07-03 22:47:01,631 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'stoppingFlag := true;' is: true [2023-07-03 22:47:01,634 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:01,635 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume stoppingEvent;' is: true [2023-07-03 22:47:01,638 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'pendingIo := pendingIo - 1;BeginParallelComposition{ParallelCodeBlock0: assume !(pendingIo == 0);ParallelCodeBlock1: assume pendingIo == 0;stoppingEvent := true;}EndParallelComposition' is: true [2023-07-03 22:47:01,639 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:47:01,641 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-07-03 22:47:01,642 INFO L180 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume !stoppingFlag;pendingIo := pendingIo + 1;' is: true [2023-07-03 22:47:01,663 INFO L201 PluginConnector]: Adding new model bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:47:01 HornClauseAST [2023-07-03 22:47:01,664 INFO L131 PluginConnector]: ------------------------ END IcfgToChc---------------------------- [2023-07-03 22:47:01,664 INFO L112 PluginConnector]: ------------------------ChcSmtPrinter---------------------------- [2023-07-03 22:47:01,664 INFO L270 PluginConnector]: Initializing ChcSmtPrinter... [2023-07-03 22:47:01,665 INFO L274 PluginConnector]: ChcSmtPrinter initialized [2023-07-03 22:47:01,666 INFO L184 PluginConnector]: Executing the observer ChcSmtPrinterObserver from plugin ChcSmtPrinter for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:47:01" (1/1) ... [2023-07-03 22:47:01,667 INFO L192 hcSmtPrinterObserver]: Writing to file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/bluetooth-better/CHC_conditional_bluetooth-better.bpl_UID10098480312530361462.smt2 [2023-07-03 22:47:01,682 INFO L131 PluginConnector]: ------------------------ END ChcSmtPrinter---------------------------- [2023-07-03 22:47:01,683 INFO L112 PluginConnector]: ------------------------ChcToBoogie---------------------------- [2023-07-03 22:47:01,683 INFO L270 PluginConnector]: Initializing ChcToBoogie... [2023-07-03 22:47:01,683 INFO L274 PluginConnector]: ChcToBoogie initialized [2023-07-03 22:47:01,685 INFO L184 PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:47:01" (1/1) ... [2023-07-03 22:47:01,712 INFO L201 PluginConnector]: Adding new model bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:01 Unit [2023-07-03 22:47:01,713 INFO L131 PluginConnector]: ------------------------ END ChcToBoogie---------------------------- [2023-07-03 22:47:01,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-07-03 22:47:01,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-07-03 22:47:01,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-07-03 22:47:01,714 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:01" (1/1) ... [2023-07-03 22:47:01,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:01" (1/1) ... [2023-07-03 22:47:01,724 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:01" (1/1) ... [2023-07-03 22:47:01,725 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:01" (1/1) ... [2023-07-03 22:47:01,729 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:01" (1/1) ... [2023-07-03 22:47:01,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:01" (1/1) ... [2023-07-03 22:47:01,739 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:01" (1/1) ... [2023-07-03 22:47:01,747 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:01" (1/1) ... [2023-07-03 22:47:01,748 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-07-03 22:47:01,748 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-07-03 22:47:01,750 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-07-03 22:47:01,750 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-07-03 22:47:01,750 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:01" (1/1) ... [2023-07-03 22:47:01,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-07-03 22:47:01,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-07-03 22:47:01,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-07-03 22:47:01,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-07-03 22:47:01,766 INFO L124 BoogieDeclarations]: Specification and implementation of procedure gotoProc given in one single declaration [2023-07-03 22:47:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure gotoProc [2023-07-03 22:47:01,766 INFO L138 BoogieDeclarations]: Found implementation of procedure gotoProc [2023-07-03 22:47:01,766 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration [2023-07-03 22:47:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure Ultimate.START [2023-07-03 22:47:01,767 INFO L138 BoogieDeclarations]: Found implementation of procedure Ultimate.START [2023-07-03 22:47:01,782 INFO L236 CfgBuilder]: Building ICFG [2023-07-03 22:47:01,783 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-07-03 22:47:01,941 INFO L277 CfgBuilder]: Performing block encoding [2023-07-03 22:47:01,942 INFO L294 CfgBuilder]: Using library mode [2023-07-03 22:47:01,943 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-07-03 22:47:01,943 INFO L201 PluginConnector]: Adding new model bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:47:01 BoogieIcfgContainer [2023-07-03 22:47:01,943 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-07-03 22:47:01,945 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-07-03 22:47:01,945 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-07-03 22:47:01,948 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-07-03 22:47:01,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.07 10:46:54" (1/5) ... [2023-07-03 22:47:01,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46677642 and model type bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:47:01, skipping insertion in model container [2023-07-03 22:47:01,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:46:54" (2/5) ... [2023-07-03 22:47:01,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46677642 and model type bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.07 10:47:01, skipping insertion in model container [2023-07-03 22:47:01,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 03.07 10:47:01" (3/5) ... [2023-07-03 22:47:01,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46677642 and model type bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 03.07 10:47:01, skipping insertion in model container [2023-07-03 22:47:01,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 03.07 10:47:01" (4/5) ... [2023-07-03 22:47:01,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46677642 and model type bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.07 10:47:01, skipping insertion in model container [2023-07-03 22:47:01,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bluetooth-better.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.07 10:47:01" (5/5) ... [2023-07-03 22:47:01,951 INFO L112 eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2023-07-03 22:47:01,966 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2023-07-03 22:47:01,966 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-07-03 22:47:02,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-07-03 22:47:02,014 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4fe48f4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-07-03 22:47:02,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-07-03 22:47:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 53 states have internal predecessors, (75), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-07-03 22:47:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-07-03 22:47:02,028 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:02,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:02,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:02,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:02,059 INFO L85 PathProgramCache]: Analyzing trace with hash 885767943, now seen corresponding path program 1 times [2023-07-03 22:47:02,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:02,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86547174] [2023-07-03 22:47:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:02,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:02,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:02,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:47:02,224 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:02,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86547174] [2023-07-03 22:47:02,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [86547174] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:02,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:02,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:02,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162424491] [2023-07-03 22:47:02,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:02,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:02,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:02,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:02,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:02,277 INFO L87 Difference]: Start difference. First operand has 66 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 53 states have internal predecessors, (75), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:02,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:02,443 INFO L93 Difference]: Finished difference Result 126 states and 188 transitions. [2023-07-03 22:47:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:02,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-07-03 22:47:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:02,472 INFO L225 Difference]: With dead ends: 126 [2023-07-03 22:47:02,472 INFO L226 Difference]: Without dead ends: 124 [2023-07-03 22:47:02,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:02,500 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 204 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:02,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 161 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-07-03 22:47:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-07-03 22:47:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-07-03 22:47:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.44) internal successors, (144), 100 states have internal predecessors, (144), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-07-03 22:47:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 186 transitions. [2023-07-03 22:47:02,583 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 186 transitions. Word has length 8 [2023-07-03 22:47:02,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:02,588 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 186 transitions. [2023-07-03 22:47:02,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 186 transitions. [2023-07-03 22:47:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-07-03 22:47:02,611 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:02,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:02,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-07-03 22:47:02,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:02,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash -984289719, now seen corresponding path program 1 times [2023-07-03 22:47:02,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:02,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322351179] [2023-07-03 22:47:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:02,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:02,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:02,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:47:02,688 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:02,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322351179] [2023-07-03 22:47:02,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322351179] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:02,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:02,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:02,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723913575] [2023-07-03 22:47:02,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:02,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:02,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:02,718 INFO L87 Difference]: Start difference. First operand 124 states and 186 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:02,992 INFO L93 Difference]: Finished difference Result 190 states and 310 transitions. [2023-07-03 22:47:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:02,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-07-03 22:47:03,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:03,008 INFO L225 Difference]: With dead ends: 190 [2023-07-03 22:47:03,008 INFO L226 Difference]: Without dead ends: 190 [2023-07-03 22:47:03,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:03,020 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 29 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:03,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 244 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-07-03 22:47:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 150. [2023-07-03 22:47:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 126 states have (on average 1.6507936507936507) internal successors, (208), 126 states have internal predecessors, (208), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-07-03 22:47:03,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 250 transitions. [2023-07-03 22:47:03,077 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 250 transitions. Word has length 10 [2023-07-03 22:47:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:03,085 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 250 transitions. [2023-07-03 22:47:03,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 250 transitions. [2023-07-03 22:47:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-07-03 22:47:03,096 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:03,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:03,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-07-03 22:47:03,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:03,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:03,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1657420072, now seen corresponding path program 1 times [2023-07-03 22:47:03,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:03,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349269917] [2023-07-03 22:47:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:03,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:03,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:03,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-07-03 22:47:03,144 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:03,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349269917] [2023-07-03 22:47:03,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [349269917] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:03,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:03,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187100876] [2023-07-03 22:47:03,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:03,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:03,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:03,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:03,146 INFO L87 Difference]: Start difference. First operand 150 states and 250 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:03,335 INFO L93 Difference]: Finished difference Result 216 states and 376 transitions. [2023-07-03 22:47:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:03,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-07-03 22:47:03,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:03,339 INFO L225 Difference]: With dead ends: 216 [2023-07-03 22:47:03,339 INFO L226 Difference]: Without dead ends: 216 [2023-07-03 22:47:03,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:03,340 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 31 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:03,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 242 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:03,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-07-03 22:47:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 176. [2023-07-03 22:47:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 152 states have (on average 1.8026315789473684) internal successors, (274), 152 states have internal predecessors, (274), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-07-03 22:47:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 316 transitions. [2023-07-03 22:47:03,355 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 316 transitions. Word has length 13 [2023-07-03 22:47:03,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:03,356 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 316 transitions. [2023-07-03 22:47:03,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:03,356 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 316 transitions. [2023-07-03 22:47:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-07-03 22:47:03,360 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:03,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:03,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-07-03 22:47:03,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:03,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:03,370 INFO L85 PathProgramCache]: Analyzing trace with hash -381864557, now seen corresponding path program 1 times [2023-07-03 22:47:03,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:03,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260881867] [2023-07-03 22:47:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:03,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:03,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-07-03 22:47:03,440 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:03,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260881867] [2023-07-03 22:47:03,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1260881867] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:03,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:03,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:03,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583188412] [2023-07-03 22:47:03,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:03,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:03,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:03,444 INFO L87 Difference]: Start difference. First operand 176 states and 316 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:03,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:03,577 INFO L93 Difference]: Finished difference Result 322 states and 600 transitions. [2023-07-03 22:47:03,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:03,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-07-03 22:47:03,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:03,584 INFO L225 Difference]: With dead ends: 322 [2023-07-03 22:47:03,584 INFO L226 Difference]: Without dead ends: 322 [2023-07-03 22:47:03,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:03,586 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 37 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:03,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 313 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-07-03 22:47:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-07-03 22:47:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2023-07-03 22:47:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 278 states have (on average 1.8633093525179856) internal successors, (518), 278 states have internal predecessors, (518), 41 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-07-03 22:47:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 600 transitions. [2023-07-03 22:47:03,606 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 600 transitions. Word has length 16 [2023-07-03 22:47:03,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:03,607 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 600 transitions. [2023-07-03 22:47:03,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:03,607 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 600 transitions. [2023-07-03 22:47:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-07-03 22:47:03,621 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:03,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:03,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-07-03 22:47:03,622 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:03,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:03,622 INFO L85 PathProgramCache]: Analyzing trace with hash 591345375, now seen corresponding path program 1 times [2023-07-03 22:47:03,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:03,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542420659] [2023-07-03 22:47:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:03,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:03,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:03,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-07-03 22:47:03,669 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542420659] [2023-07-03 22:47:03,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [542420659] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:03,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:03,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:03,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415881151] [2023-07-03 22:47:03,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:03,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:03,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:03,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:03,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:03,671 INFO L87 Difference]: Start difference. First operand 322 states and 600 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:03,913 INFO L93 Difference]: Finished difference Result 494 states and 1012 transitions. [2023-07-03 22:47:03,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-07-03 22:47:03,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-07-03 22:47:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:03,931 INFO L225 Difference]: With dead ends: 494 [2023-07-03 22:47:03,941 INFO L226 Difference]: Without dead ends: 494 [2023-07-03 22:47:03,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:03,942 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 29 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:03,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 236 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-07-03 22:47:03,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 494. [2023-07-03 22:47:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 410 states have (on average 2.073170731707317) internal successors, (850), 410 states have internal predecessors, (850), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-07-03 22:47:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1012 transitions. [2023-07-03 22:47:04,028 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1012 transitions. Word has length 19 [2023-07-03 22:47:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:04,028 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 1012 transitions. [2023-07-03 22:47:04,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1012 transitions. [2023-07-03 22:47:04,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-07-03 22:47:04,084 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:04,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:04,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-07-03 22:47:04,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:04,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:04,094 INFO L85 PathProgramCache]: Analyzing trace with hash -643544612, now seen corresponding path program 1 times [2023-07-03 22:47:04,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:04,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693923878] [2023-07-03 22:47:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:04,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:04,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:04,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-07-03 22:47:04,191 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:04,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693923878] [2023-07-03 22:47:04,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693923878] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:04,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:04,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-07-03 22:47:04,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327103502] [2023-07-03 22:47:04,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:04,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-07-03 22:47:04,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:04,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-07-03 22:47:04,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-07-03 22:47:04,227 INFO L87 Difference]: Start difference. First operand 494 states and 1012 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:04,344 INFO L93 Difference]: Finished difference Result 910 states and 1944 transitions. [2023-07-03 22:47:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-07-03 22:47:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-07-03 22:47:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:04,370 INFO L225 Difference]: With dead ends: 910 [2023-07-03 22:47:04,370 INFO L226 Difference]: Without dead ends: 910 [2023-07-03 22:47:04,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-07-03 22:47:04,373 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 32 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:04,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 209 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-07-03 22:47:04,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-07-03 22:47:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 588. [2023-07-03 22:47:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 488 states have (on average 2.1434426229508197) internal successors, (1046), 488 states have internal predecessors, (1046), 97 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2023-07-03 22:47:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1240 transitions. [2023-07-03 22:47:04,427 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1240 transitions. Word has length 22 [2023-07-03 22:47:04,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:04,428 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 1240 transitions. [2023-07-03 22:47:04,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1240 transitions. [2023-07-03 22:47:04,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-07-03 22:47:04,469 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:04,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:04,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-07-03 22:47:04,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:04,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:04,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1100457791, now seen corresponding path program 1 times [2023-07-03 22:47:04,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:04,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500699011] [2023-07-03 22:47:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:04,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:04,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:04,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-07-03 22:47:04,520 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:04,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500699011] [2023-07-03 22:47:04,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [500699011] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:04,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:04,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:04,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108560925] [2023-07-03 22:47:04,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:04,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:04,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:04,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:04,524 INFO L87 Difference]: Start difference. First operand 588 states and 1240 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-07-03 22:47:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:04,738 INFO L93 Difference]: Finished difference Result 842 states and 1758 transitions. [2023-07-03 22:47:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-07-03 22:47:04,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-07-03 22:47:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:04,768 INFO L225 Difference]: With dead ends: 842 [2023-07-03 22:47:04,768 INFO L226 Difference]: Without dead ends: 842 [2023-07-03 22:47:04,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:04,769 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 29 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:04,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 232 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2023-07-03 22:47:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 650. [2023-07-03 22:47:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 550 states have (on average 2.32) internal successors, (1276), 550 states have internal predecessors, (1276), 97 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2023-07-03 22:47:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1470 transitions. [2023-07-03 22:47:04,858 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1470 transitions. Word has length 26 [2023-07-03 22:47:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:04,859 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 1470 transitions. [2023-07-03 22:47:04,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-07-03 22:47:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1470 transitions. [2023-07-03 22:47:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:47:04,900 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:04,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:04,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-07-03 22:47:04,900 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:04,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:04,901 INFO L85 PathProgramCache]: Analyzing trace with hash -621713077, now seen corresponding path program 1 times [2023-07-03 22:47:04,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:04,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629803798] [2023-07-03 22:47:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:04,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:04,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:04,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-07-03 22:47:04,931 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:04,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629803798] [2023-07-03 22:47:04,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [629803798] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:04,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:04,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:04,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751674226] [2023-07-03 22:47:04,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:04,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:04,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:04,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:04,933 INFO L87 Difference]: Start difference. First operand 650 states and 1470 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:05,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:05,147 INFO L93 Difference]: Finished difference Result 904 states and 1988 transitions. [2023-07-03 22:47:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-07-03 22:47:05,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-07-03 22:47:05,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:05,180 INFO L225 Difference]: With dead ends: 904 [2023-07-03 22:47:05,180 INFO L226 Difference]: Without dead ends: 904 [2023-07-03 22:47:05,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:05,181 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 25 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:05,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 248 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2023-07-03 22:47:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 650. [2023-07-03 22:47:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 550 states have (on average 2.32) internal successors, (1276), 550 states have internal predecessors, (1276), 97 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2023-07-03 22:47:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1470 transitions. [2023-07-03 22:47:05,235 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1470 transitions. Word has length 25 [2023-07-03 22:47:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:05,236 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 1470 transitions. [2023-07-03 22:47:05,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:05,236 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1470 transitions. [2023-07-03 22:47:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:47:05,268 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:05,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:05,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-07-03 22:47:05,268 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:05,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:05,269 INFO L85 PathProgramCache]: Analyzing trace with hash -174319984, now seen corresponding path program 1 times [2023-07-03 22:47:05,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:05,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635651310] [2023-07-03 22:47:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:05,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:05,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2023-07-03 22:47:05,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-07-03 22:47:05,389 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:05,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635651310] [2023-07-03 22:47:05,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1635651310] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:05,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:05,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-07-03 22:47:05,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547512288] [2023-07-03 22:47:05,389 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:05,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-07-03 22:47:05,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:05,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-07-03 22:47:05,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-07-03 22:47:05,391 INFO L87 Difference]: Start difference. First operand 650 states and 1470 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:06,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:06,014 INFO L93 Difference]: Finished difference Result 1930 states and 4526 transitions. [2023-07-03 22:47:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-07-03 22:47:06,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-07-03 22:47:06,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:06,111 INFO L225 Difference]: With dead ends: 1930 [2023-07-03 22:47:06,111 INFO L226 Difference]: Without dead ends: 1930 [2023-07-03 22:47:06,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-07-03 22:47:06,112 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 217 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:06,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 324 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-07-03 22:47:06,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2023-07-03 22:47:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 770. [2023-07-03 22:47:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 654 states have (on average 2.3486238532110093) internal successors, (1536), 654 states have internal predecessors, (1536), 113 states have call successors, (113), 2 states have call predecessors, (113), 2 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-07-03 22:47:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1762 transitions. [2023-07-03 22:47:06,219 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1762 transitions. Word has length 25 [2023-07-03 22:47:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:06,219 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 1762 transitions. [2023-07-03 22:47:06,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1762 transitions. [2023-07-03 22:47:06,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-07-03 22:47:06,263 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:06,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:06,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-07-03 22:47:06,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:06,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:06,264 INFO L85 PathProgramCache]: Analyzing trace with hash -629166020, now seen corresponding path program 2 times [2023-07-03 22:47:06,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:06,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096504852] [2023-07-03 22:47:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:06,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:06,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:06,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-07-03 22:47:06,291 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:06,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096504852] [2023-07-03 22:47:06,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2096504852] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:06,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:06,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:06,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657217037] [2023-07-03 22:47:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:06,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:06,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:06,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:06,293 INFO L87 Difference]: Start difference. First operand 770 states and 1762 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:06,509 INFO L93 Difference]: Finished difference Result 1090 states and 2738 transitions. [2023-07-03 22:47:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-07-03 22:47:06,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-07-03 22:47:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:06,544 INFO L225 Difference]: With dead ends: 1090 [2023-07-03 22:47:06,544 INFO L226 Difference]: Without dead ends: 1090 [2023-07-03 22:47:06,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:06,545 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 37 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:06,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 232 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2023-07-03 22:47:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1090. [2023-07-03 22:47:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 902 states have (on average 2.625277161862528) internal successors, (2368), 902 states have internal predecessors, (2368), 185 states have call successors, (185), 2 states have call predecessors, (185), 2 states have return successors, (185), 185 states have call predecessors, (185), 185 states have call successors, (185) [2023-07-03 22:47:06,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 2738 transitions. [2023-07-03 22:47:06,607 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 2738 transitions. Word has length 25 [2023-07-03 22:47:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:06,608 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 2738 transitions. [2023-07-03 22:47:06,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 2738 transitions. [2023-07-03 22:47:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-07-03 22:47:06,757 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:06,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:06,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-07-03 22:47:06,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:06,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:06,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1648559303, now seen corresponding path program 1 times [2023-07-03 22:47:06,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:06,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385407990] [2023-07-03 22:47:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:06,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:06,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:06,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-07-03 22:47:06,788 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:06,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385407990] [2023-07-03 22:47:06,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1385407990] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:06,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:06,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-07-03 22:47:06,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330864103] [2023-07-03 22:47:06,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:06,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-07-03 22:47:06,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:06,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-07-03 22:47:06,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-07-03 22:47:06,790 INFO L87 Difference]: Start difference. First operand 1090 states and 2738 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:06,985 INFO L93 Difference]: Finished difference Result 1880 states and 4662 transitions. [2023-07-03 22:47:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-07-03 22:47:06,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-07-03 22:47:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:07,059 INFO L225 Difference]: With dead ends: 1880 [2023-07-03 22:47:07,059 INFO L226 Difference]: Without dead ends: 1152 [2023-07-03 22:47:07,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-07-03 22:47:07,060 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 33 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:07,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 167 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-07-03 22:47:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2023-07-03 22:47:07,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1146. [2023-07-03 22:47:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 938 states have (on average 2.343283582089552) internal successors, (2198), 938 states have internal predecessors, (2198), 205 states have call successors, (205), 2 states have call predecessors, (205), 2 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2023-07-03 22:47:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 2608 transitions. [2023-07-03 22:47:07,156 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 2608 transitions. Word has length 28 [2023-07-03 22:47:07,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:07,157 INFO L495 AbstractCegarLoop]: Abstraction has 1146 states and 2608 transitions. [2023-07-03 22:47:07,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-07-03 22:47:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 2608 transitions. [2023-07-03 22:47:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-07-03 22:47:07,272 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:07,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:07,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-07-03 22:47:07,272 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:07,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1271947361, now seen corresponding path program 1 times [2023-07-03 22:47:07,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:07,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091622931] [2023-07-03 22:47:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:07,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:07,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:07,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-07-03 22:47:07,316 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:07,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091622931] [2023-07-03 22:47:07,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1091622931] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:07,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:07,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:47:07,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091399952] [2023-07-03 22:47:07,317 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:07,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:47:07,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:07,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:47:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:47:07,318 INFO L87 Difference]: Start difference. First operand 1146 states and 2608 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-07-03 22:47:07,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:07,989 INFO L93 Difference]: Finished difference Result 2990 states and 7169 transitions. [2023-07-03 22:47:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-07-03 22:47:07,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-07-03 22:47:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:08,277 INFO L225 Difference]: With dead ends: 2990 [2023-07-03 22:47:08,277 INFO L226 Difference]: Without dead ends: 2990 [2023-07-03 22:47:08,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-07-03 22:47:08,278 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 334 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:08,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 376 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:47:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2023-07-03 22:47:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2853. [2023-07-03 22:47:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2334 states have (on average 2.3654670094258785) internal successors, (5521), 2334 states have internal predecessors, (5521), 515 states have call successors, (515), 3 states have call predecessors, (515), 3 states have return successors, (801), 515 states have call predecessors, (801), 515 states have call successors, (801) [2023-07-03 22:47:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 6837 transitions. [2023-07-03 22:47:08,843 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 6837 transitions. Word has length 32 [2023-07-03 22:47:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:08,844 INFO L495 AbstractCegarLoop]: Abstraction has 2853 states and 6837 transitions. [2023-07-03 22:47:08,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-07-03 22:47:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 6837 transitions. [2023-07-03 22:47:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-07-03 22:47:09,353 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:09,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:09,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-07-03 22:47:09,353 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:09,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:09,354 INFO L85 PathProgramCache]: Analyzing trace with hash 102460511, now seen corresponding path program 2 times [2023-07-03 22:47:09,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:09,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136889883] [2023-07-03 22:47:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:09,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:09,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:09,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-07-03 22:47:09,396 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:09,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136889883] [2023-07-03 22:47:09,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1136889883] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:09,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:09,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-07-03 22:47:09,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262430494] [2023-07-03 22:47:09,396 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:09,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-07-03 22:47:09,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:09,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-07-03 22:47:09,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:09,397 INFO L87 Difference]: Start difference. First operand 2853 states and 6837 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-07-03 22:47:12,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:12,341 INFO L93 Difference]: Finished difference Result 9004 states and 23129 transitions. [2023-07-03 22:47:12,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-07-03 22:47:12,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-07-03 22:47:12,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:15,037 INFO L225 Difference]: With dead ends: 9004 [2023-07-03 22:47:15,038 INFO L226 Difference]: Without dead ends: 9004 [2023-07-03 22:47:15,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-07-03 22:47:15,038 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 290 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:15,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 463 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-07-03 22:47:15,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9004 states. [2023-07-03 22:47:16,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9004 to 8025. [2023-07-03 22:47:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8025 states, 6566 states have (on average 2.427657630216266) internal successors, (15940), 6566 states have internal predecessors, (15940), 1453 states have call successors, (1453), 5 states have call predecessors, (1453), 5 states have return successors, (3451), 1453 states have call predecessors, (3451), 1453 states have call successors, (3451) [2023-07-03 22:47:17,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8025 states to 8025 states and 20844 transitions. [2023-07-03 22:47:17,977 INFO L78 Accepts]: Start accepts. Automaton has 8025 states and 20844 transitions. Word has length 32 [2023-07-03 22:47:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:17,977 INFO L495 AbstractCegarLoop]: Abstraction has 8025 states and 20844 transitions. [2023-07-03 22:47:17,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-07-03 22:47:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 8025 states and 20844 transitions. [2023-07-03 22:47:19,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-07-03 22:47:19,569 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:19,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:19,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-07-03 22:47:19,570 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:19,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:19,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1555004444, now seen corresponding path program 1 times [2023-07-03 22:47:19,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:19,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938882820] [2023-07-03 22:47:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:19,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:19,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2023-07-03 22:47:19,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-07-03 22:47:19,601 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:19,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938882820] [2023-07-03 22:47:19,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [938882820] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:47:19,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:47:19,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:47:19,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146933436] [2023-07-03 22:47:19,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:47:19,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:47:19,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:19,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:47:19,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:47:19,603 INFO L87 Difference]: Start difference. First operand 8025 states and 20844 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-07-03 22:47:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:23,242 INFO L93 Difference]: Finished difference Result 11518 states and 31612 transitions. [2023-07-03 22:47:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-07-03 22:47:23,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-07-03 22:47:23,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:27,478 INFO L225 Difference]: With dead ends: 11518 [2023-07-03 22:47:27,478 INFO L226 Difference]: Without dead ends: 11518 [2023-07-03 22:47:27,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:27,479 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 39 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:27,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 230 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:47:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11518 states. [2023-07-03 22:47:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11518 to 11127. [2023-07-03 22:47:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11127 states, 8966 states have (on average 2.5711577068927056) internal successors, (23053), 8966 states have internal predecessors, (23053), 2155 states have call successors, (2155), 5 states have call predecessors, (2155), 5 states have return successors, (5257), 2155 states have call predecessors, (5257), 2155 states have call successors, (5257) [2023-07-03 22:47:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11127 states to 11127 states and 30465 transitions. [2023-07-03 22:47:32,509 INFO L78 Accepts]: Start accepts. Automaton has 11127 states and 30465 transitions. Word has length 32 [2023-07-03 22:47:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:47:32,509 INFO L495 AbstractCegarLoop]: Abstraction has 11127 states and 30465 transitions. [2023-07-03 22:47:32,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-07-03 22:47:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 11127 states and 30465 transitions. [2023-07-03 22:47:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-07-03 22:47:35,803 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:47:35,803 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:47:35,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-07-03 22:47:35,804 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:47:35,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:47:35,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1924493335, now seen corresponding path program 1 times [2023-07-03 22:47:35,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:47:35,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901769251] [2023-07-03 22:47:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:47:35,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:47:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:47:35,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:47:35,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:47:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-07-03 22:47:35,855 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:47:35,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901769251] [2023-07-03 22:47:35,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [901769251] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:47:35,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:47:35,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-07-03 22:47:35,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646888075] [2023-07-03 22:47:35,856 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:47:35,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-07-03 22:47:35,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:47:35,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-07-03 22:47:35,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:47:35,857 INFO L87 Difference]: Start difference. First operand 11127 states and 30465 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-07-03 22:47:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:47:46,202 INFO L93 Difference]: Finished difference Result 25409 states and 71665 transitions. [2023-07-03 22:47:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-07-03 22:47:46,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-07-03 22:47:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:47:55,594 INFO L225 Difference]: With dead ends: 25409 [2023-07-03 22:47:55,595 INFO L226 Difference]: Without dead ends: 22647 [2023-07-03 22:47:55,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:47:55,596 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 264 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:47:55,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 322 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:47:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22647 states. [2023-07-03 22:48:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22647 to 18301. [2023-07-03 22:48:00,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18301 states, 14750 states have (on average 2.561966101694915) internal successors, (37789), 14750 states have internal predecessors, (37789), 3541 states have call successors, (3541), 9 states have call predecessors, (3541), 9 states have return successors, (9761), 3541 states have call predecessors, (9761), 3541 states have call successors, (9761) [2023-07-03 22:48:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18301 states to 18301 states and 51091 transitions. [2023-07-03 22:48:03,760 INFO L78 Accepts]: Start accepts. Automaton has 18301 states and 51091 transitions. Word has length 35 [2023-07-03 22:48:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:48:03,760 INFO L495 AbstractCegarLoop]: Abstraction has 18301 states and 51091 transitions. [2023-07-03 22:48:03,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-07-03 22:48:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 18301 states and 51091 transitions. [2023-07-03 22:48:07,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-07-03 22:48:07,073 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:48:07,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:48:07,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-07-03 22:48:07,073 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:48:07,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:48:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1942334153, now seen corresponding path program 2 times [2023-07-03 22:48:07,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:48:07,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299327685] [2023-07-03 22:48:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:48:07,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:48:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:48:07,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2023-07-03 22:48:07,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:48:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-07-03 22:48:07,151 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:48:07,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299327685] [2023-07-03 22:48:07,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [299327685] provided 1 perfect and 0 imperfect interpolant sequences [2023-07-03 22:48:07,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-07-03 22:48:07,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-07-03 22:48:07,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192674469] [2023-07-03 22:48:07,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-07-03 22:48:07,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-07-03 22:48:07,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:48:07,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-07-03 22:48:07,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-07-03 22:48:07,158 INFO L87 Difference]: Start difference. First operand 18301 states and 51091 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-07-03 22:48:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:48:11,961 INFO L93 Difference]: Finished difference Result 17502 states and 49269 transitions. [2023-07-03 22:48:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-07-03 22:48:11,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-07-03 22:48:11,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:48:17,090 INFO L225 Difference]: With dead ends: 17502 [2023-07-03 22:48:17,091 INFO L226 Difference]: Without dead ends: 17502 [2023-07-03 22:48:17,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-07-03 22:48:17,091 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 27 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-07-03 22:48:17,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 225 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-07-03 22:48:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17502 states. [2023-07-03 22:48:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17502 to 16699. [2023-07-03 22:48:20,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16699 states, 13430 states have (on average 2.575874906924795) internal successors, (34594), 13430 states have internal predecessors, (34594), 3259 states have call successors, (3259), 9 states have call predecessors, (3259), 9 states have return successors, (9067), 3259 states have call predecessors, (9067), 3259 states have call successors, (9067) [2023-07-03 22:48:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16699 states to 16699 states and 46920 transitions. [2023-07-03 22:48:23,591 INFO L78 Accepts]: Start accepts. Automaton has 16699 states and 46920 transitions. Word has length 35 [2023-07-03 22:48:23,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:48:23,592 INFO L495 AbstractCegarLoop]: Abstraction has 16699 states and 46920 transitions. [2023-07-03 22:48:23,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-07-03 22:48:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 16699 states and 46920 transitions. [2023-07-03 22:48:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-07-03 22:48:25,375 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:48:25,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:48:25,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-07-03 22:48:25,375 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:48:25,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:48:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1885357518, now seen corresponding path program 1 times [2023-07-03 22:48:25,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:48:25,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506659163] [2023-07-03 22:48:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:48:25,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:48:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:48:25,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2023-07-03 22:48:25,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:48:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-07-03 22:48:25,446 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:48:25,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506659163] [2023-07-03 22:48:25,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1506659163] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:48:25,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:48:25,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:48:25,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604171289] [2023-07-03 22:48:25,446 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:48:25,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:48:25,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:48:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:48:25,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:48:25,447 INFO L87 Difference]: Start difference. First operand 16699 states and 46920 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-07-03 22:48:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:48:30,898 INFO L93 Difference]: Finished difference Result 18211 states and 53177 transitions. [2023-07-03 22:48:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-07-03 22:48:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-07-03 22:48:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:48:36,647 INFO L225 Difference]: With dead ends: 18211 [2023-07-03 22:48:36,647 INFO L226 Difference]: Without dead ends: 18210 [2023-07-03 22:48:36,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-07-03 22:48:36,648 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 254 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-07-03 22:48:36,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 292 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-07-03 22:48:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18210 states. [2023-07-03 22:48:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18210 to 17463. [2023-07-03 22:48:40,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17463 states, 14028 states have (on average 2.5900342172797264) internal successors, (36333), 14030 states have internal predecessors, (36333), 3423 states have call successors, (3423), 9 states have call predecessors, (3423), 11 states have return successors, (11467), 3423 states have call predecessors, (11467), 3423 states have call successors, (11467) [2023-07-03 22:48:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17463 states to 17463 states and 51223 transitions. [2023-07-03 22:48:43,746 INFO L78 Accepts]: Start accepts. Automaton has 17463 states and 51223 transitions. Word has length 35 [2023-07-03 22:48:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-07-03 22:48:43,747 INFO L495 AbstractCegarLoop]: Abstraction has 17463 states and 51223 transitions. [2023-07-03 22:48:43,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-07-03 22:48:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 17463 states and 51223 transitions. [2023-07-03 22:48:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-07-03 22:48:45,437 INFO L187 NwaCegarLoop]: Found error trace [2023-07-03 22:48:45,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-07-03 22:48:45,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-07-03 22:48:45,438 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-07-03 22:48:45,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-07-03 22:48:45,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1990478062, now seen corresponding path program 2 times [2023-07-03 22:48:45,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-07-03 22:48:45,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566576240] [2023-07-03 22:48:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-07-03 22:48:45,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-07-03 22:48:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-07-03 22:48:45,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2023-07-03 22:48:45,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-07-03 22:48:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-07-03 22:48:45,502 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-07-03 22:48:45,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566576240] [2023-07-03 22:48:45,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566576240] provided 0 perfect and 1 imperfect interpolant sequences [2023-07-03 22:48:45,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-07-03 22:48:45,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-07-03 22:48:45,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792560105] [2023-07-03 22:48:45,502 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-07-03 22:48:45,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-07-03 22:48:45,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-07-03 22:48:45,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-07-03 22:48:45,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-07-03 22:48:45,503 INFO L87 Difference]: Start difference. First operand 17463 states and 51223 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-07-03 22:49:41,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-07-03 22:49:41,723 INFO L93 Difference]: Finished difference Result 38679 states and 135617 transitions. [2023-07-03 22:49:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-07-03 22:49:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-07-03 22:49:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-07-03 22:50:44,434 INFO L225 Difference]: With dead ends: 38679 [2023-07-03 22:50:44,435 INFO L226 Difference]: Without dead ends: 38679 [2023-07-03 22:50:44,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-07-03 22:50:44,436 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 210 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-07-03 22:50:44,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 284 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-07-03 22:50:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38679 states.