java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:18:53,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:18:53,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:18:53,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:18:53,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:18:53,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:18:53,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:18:53,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:18:53,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:18:53,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:18:53,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:18:53,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:18:53,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:18:53,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:18:53,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:18:53,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:18:53,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:18:53,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:18:53,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:18:53,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:18:53,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:18:53,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:18:53,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:18:53,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:18:53,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:18:53,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:18:53,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:18:53,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:18:53,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:18:53,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:18:53,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:18:53,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:18:53,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:18:53,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:18:53,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:18:53,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:18:53,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:18:53,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:18:53,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:18:53,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:18:53,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:18:53,756 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 19:18:53,789 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:18:53,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:18:53,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:18:53,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:18:53,791 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:18:53,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:18:53,792 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:18:53,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:18:53,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:18:53,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:18:53,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:18:53,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:18:53,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:18:53,793 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:18:53,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:18:53,794 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:18:53,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:18:53,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:18:53,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:18:53,794 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:18:53,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:18:53,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:18:53,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:18:53,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:18:53,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:18:53,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:18:53,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:18:53,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:18:53,796 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:18:54,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:18:54,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:18:54,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:18:54,126 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:18:54,127 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:18:54,127 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2019-10-13 19:18:54,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fdff0073/d9ad5f4741be4ddda081c1dfd82524ef/FLAGab10759a9 [2019-10-13 19:18:54,711 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:18:54,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2019-10-13 19:18:54,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fdff0073/d9ad5f4741be4ddda081c1dfd82524ef/FLAGab10759a9 [2019-10-13 19:18:55,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fdff0073/d9ad5f4741be4ddda081c1dfd82524ef [2019-10-13 19:18:55,060 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:18:55,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:18:55,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:18:55,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:18:55,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:18:55,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:55" (1/1) ... [2019-10-13 19:18:55,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cce3650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:55, skipping insertion in model container [2019-10-13 19:18:55,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:55" (1/1) ... [2019-10-13 19:18:55,078 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:18:55,135 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:18:55,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:18:55,589 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:18:55,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:18:55,750 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:18:55,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:55 WrapperNode [2019-10-13 19:18:55,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:18:55,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:18:55,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:18:55,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:18:55,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:55" (1/1) ... [2019-10-13 19:18:55,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:55" (1/1) ... [2019-10-13 19:18:55,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:55" (1/1) ... [2019-10-13 19:18:55,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:55" (1/1) ... [2019-10-13 19:18:55,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:55" (1/1) ... [2019-10-13 19:18:55,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:55" (1/1) ... [2019-10-13 19:18:55,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:55" (1/1) ... [2019-10-13 19:18:55,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:18:55,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:18:55,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:18:55,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:18:55,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:18:55,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:18:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:18:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2019-10-13 19:18:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2019-10-13 19:18:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2019-10-13 19:18:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2019-10-13 19:18:55,906 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2019-10-13 19:18:55,906 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2019-10-13 19:18:55,906 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2019-10-13 19:18:55,906 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2019-10-13 19:18:55,906 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2019-10-13 19:18:55,906 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2019-10-13 19:18:55,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:18:55,907 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2019-10-13 19:18:55,907 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2019-10-13 19:18:55,907 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2019-10-13 19:18:55,907 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2019-10-13 19:18:55,908 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2019-10-13 19:18:55,908 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2019-10-13 19:18:55,908 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2019-10-13 19:18:55,908 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2019-10-13 19:18:55,908 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2019-10-13 19:18:55,908 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2019-10-13 19:18:55,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2019-10-13 19:18:55,909 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2019-10-13 19:18:55,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2019-10-13 19:18:55,909 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2019-10-13 19:18:55,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:18:55,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-13 19:18:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:18:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-13 19:18:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-13 19:18:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2019-10-13 19:18:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2019-10-13 19:18:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2019-10-13 19:18:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2019-10-13 19:18:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2019-10-13 19:18:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2019-10-13 19:18:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2019-10-13 19:18:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2019-10-13 19:18:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2019-10-13 19:18:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2019-10-13 19:18:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2019-10-13 19:18:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2019-10-13 19:18:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2019-10-13 19:18:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2019-10-13 19:18:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2019-10-13 19:18:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2019-10-13 19:18:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2019-10-13 19:18:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2019-10-13 19:18:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2019-10-13 19:18:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2019-10-13 19:18:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2019-10-13 19:18:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2019-10-13 19:18:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:18:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2019-10-13 19:18:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2019-10-13 19:18:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:18:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:18:56,210 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 19:18:56,280 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-13 19:18:56,281 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-13 19:18:56,289 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 19:18:56,304 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-13 19:18:56,304 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-13 19:18:56,314 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 19:18:56,564 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2019-10-13 19:18:56,564 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2019-10-13 19:18:56,566 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 19:18:56,638 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2019-10-13 19:18:56,639 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2019-10-13 19:18:56,654 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 19:18:56,675 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2019-10-13 19:18:56,675 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2019-10-13 19:18:56,756 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 19:18:56,768 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-13 19:18:56,769 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-13 19:18:56,769 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 19:18:56,780 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-13 19:18:56,781 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-13 19:18:56,781 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 19:18:56,795 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-13 19:18:56,795 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-13 19:18:56,840 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 19:18:56,893 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2019-10-13 19:18:56,893 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2019-10-13 19:18:56,925 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 19:18:56,931 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-13 19:18:56,931 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-13 19:18:56,932 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 19:18:56,951 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-13 19:18:56,951 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-13 19:18:56,952 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-13 19:18:56,960 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-13 19:18:56,960 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-13 19:18:56,977 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:18:56,980 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 19:18:56,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:56 BoogieIcfgContainer [2019-10-13 19:18:56,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:18:56,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:18:56,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:18:56,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:18:56,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:18:55" (1/3) ... [2019-10-13 19:18:56,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470b4d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:56, skipping insertion in model container [2019-10-13 19:18:56,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:55" (2/3) ... [2019-10-13 19:18:56,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470b4d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:56, skipping insertion in model container [2019-10-13 19:18:56,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:56" (3/3) ... [2019-10-13 19:18:56,997 INFO L109 eAbstractionObserver]: Analyzing ICFG floppy_simpl3.cil-2.c [2019-10-13 19:18:57,010 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:18:57,019 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:18:57,028 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:18:57,057 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:18:57,058 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:18:57,058 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:18:57,058 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:18:57,058 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:18:57,058 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:18:57,058 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:18:57,059 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:18:57,087 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states. [2019-10-13 19:18:57,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:18:57,095 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:57,096 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:57,097 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash -194924121, now seen corresponding path program 1 times [2019-10-13 19:18:57,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:57,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704687892] [2019-10-13 19:18:57,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:57,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:57,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:18:57,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704687892] [2019-10-13 19:18:57,605 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:18:57,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:18:57,605 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428275613] [2019-10-13 19:18:57,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:18:57,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:57,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:18:57,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:18:57,623 INFO L87 Difference]: Start difference. First operand 304 states. Second operand 5 states. [2019-10-13 19:18:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:59,000 INFO L93 Difference]: Finished difference Result 538 states and 779 transitions. [2019-10-13 19:18:59,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:18:59,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-13 19:18:59,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:59,019 INFO L225 Difference]: With dead ends: 538 [2019-10-13 19:18:59,019 INFO L226 Difference]: Without dead ends: 322 [2019-10-13 19:18:59,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:18:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2019-10-13 19:18:59,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 292. [2019-10-13 19:18:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2019-10-13 19:18:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 385 transitions. [2019-10-13 19:18:59,114 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 385 transitions. Word has length 20 [2019-10-13 19:18:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:59,115 INFO L462 AbstractCegarLoop]: Abstraction has 292 states and 385 transitions. [2019-10-13 19:18:59,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:18:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 385 transitions. [2019-10-13 19:18:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 19:18:59,117 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:59,117 INFO L380 BasicCegarLoop]: 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] [2019-10-13 19:18:59,117 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash -632063438, now seen corresponding path program 1 times [2019-10-13 19:18:59,118 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:59,118 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970612494] [2019-10-13 19:18:59,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:59,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:59,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:18:59,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970612494] [2019-10-13 19:18:59,441 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:18:59,441 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 19:18:59,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811455878] [2019-10-13 19:18:59,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:18:59,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:59,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:18:59,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:18:59,444 INFO L87 Difference]: Start difference. First operand 292 states and 385 transitions. Second operand 7 states. [2019-10-13 19:19:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:01,712 INFO L93 Difference]: Finished difference Result 846 states and 1124 transitions. [2019-10-13 19:19:01,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:19:01,713 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-10-13 19:19:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:01,719 INFO L225 Difference]: With dead ends: 846 [2019-10-13 19:19:01,719 INFO L226 Difference]: Without dead ends: 575 [2019-10-13 19:19:01,722 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:19:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2019-10-13 19:19:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 381. [2019-10-13 19:19:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2019-10-13 19:19:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 497 transitions. [2019-10-13 19:19:01,791 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 497 transitions. Word has length 28 [2019-10-13 19:19:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:01,791 INFO L462 AbstractCegarLoop]: Abstraction has 381 states and 497 transitions. [2019-10-13 19:19:01,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:19:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 497 transitions. [2019-10-13 19:19:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 19:19:01,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:01,793 INFO L380 BasicCegarLoop]: 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] [2019-10-13 19:19:01,793 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:01,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:01,793 INFO L82 PathProgramCache]: Analyzing trace with hash 177283188, now seen corresponding path program 1 times [2019-10-13 19:19:01,794 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:01,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972894461] [2019-10-13 19:19:01,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:01,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:01,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:01,977 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-10-13 19:19:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:02,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972894461] [2019-10-13 19:19:02,065 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:02,065 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:19:02,065 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020454231] [2019-10-13 19:19:02,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:19:02,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:02,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:19:02,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:19:02,067 INFO L87 Difference]: Start difference. First operand 381 states and 497 transitions. Second operand 6 states. [2019-10-13 19:19:03,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:03,936 INFO L93 Difference]: Finished difference Result 758 states and 1012 transitions. [2019-10-13 19:19:03,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:19:03,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-10-13 19:19:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:03,942 INFO L225 Difference]: With dead ends: 758 [2019-10-13 19:19:03,942 INFO L226 Difference]: Without dead ends: 597 [2019-10-13 19:19:03,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:19:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2019-10-13 19:19:04,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 524. [2019-10-13 19:19:04,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2019-10-13 19:19:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 686 transitions. [2019-10-13 19:19:04,019 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 686 transitions. Word has length 28 [2019-10-13 19:19:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:04,020 INFO L462 AbstractCegarLoop]: Abstraction has 524 states and 686 transitions. [2019-10-13 19:19:04,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:19:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 686 transitions. [2019-10-13 19:19:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 19:19:04,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:04,022 INFO L380 BasicCegarLoop]: 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, 1, 1] [2019-10-13 19:19:04,023 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:04,024 INFO L82 PathProgramCache]: Analyzing trace with hash 182749823, now seen corresponding path program 1 times [2019-10-13 19:19:04,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:04,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242061107] [2019-10-13 19:19:04,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:04,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:04,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:04,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242061107] [2019-10-13 19:19:04,233 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:04,233 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:19:04,233 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858595359] [2019-10-13 19:19:04,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:19:04,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:04,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:19:04,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:19:04,238 INFO L87 Difference]: Start difference. First operand 524 states and 686 transitions. Second operand 6 states. [2019-10-13 19:19:05,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:05,886 INFO L93 Difference]: Finished difference Result 1076 states and 1422 transitions. [2019-10-13 19:19:05,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:19:05,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-10-13 19:19:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:05,893 INFO L225 Difference]: With dead ends: 1076 [2019-10-13 19:19:05,893 INFO L226 Difference]: Without dead ends: 771 [2019-10-13 19:19:05,894 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:19:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2019-10-13 19:19:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 712. [2019-10-13 19:19:05,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2019-10-13 19:19:05,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 943 transitions. [2019-10-13 19:19:05,960 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 943 transitions. Word has length 30 [2019-10-13 19:19:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:05,960 INFO L462 AbstractCegarLoop]: Abstraction has 712 states and 943 transitions. [2019-10-13 19:19:05,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:19:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 943 transitions. [2019-10-13 19:19:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 19:19:05,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:05,963 INFO L380 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:05,963 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:05,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:05,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1294168590, now seen corresponding path program 1 times [2019-10-13 19:19:05,963 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:05,964 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826096625] [2019-10-13 19:19:05,964 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:05,964 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:05,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:06,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826096625] [2019-10-13 19:19:06,140 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:06,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:19:06,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394861045] [2019-10-13 19:19:06,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:19:06,141 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:06,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:19:06,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:19:06,142 INFO L87 Difference]: Start difference. First operand 712 states and 943 transitions. Second operand 6 states. [2019-10-13 19:19:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:07,699 INFO L93 Difference]: Finished difference Result 886 states and 1160 transitions. [2019-10-13 19:19:07,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:19:07,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-10-13 19:19:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:07,706 INFO L225 Difference]: With dead ends: 886 [2019-10-13 19:19:07,707 INFO L226 Difference]: Without dead ends: 868 [2019-10-13 19:19:07,708 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:19:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2019-10-13 19:19:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 795. [2019-10-13 19:19:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2019-10-13 19:19:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1049 transitions. [2019-10-13 19:19:07,784 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1049 transitions. Word has length 34 [2019-10-13 19:19:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:07,786 INFO L462 AbstractCegarLoop]: Abstraction has 795 states and 1049 transitions. [2019-10-13 19:19:07,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:19:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1049 transitions. [2019-10-13 19:19:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 19:19:07,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:07,794 INFO L380 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:07,795 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:07,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2013424057, now seen corresponding path program 1 times [2019-10-13 19:19:07,795 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:07,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779955736] [2019-10-13 19:19:07,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:07,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:07,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:07,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779955736] [2019-10-13 19:19:07,976 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:07,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 19:19:07,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189773579] [2019-10-13 19:19:07,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:19:07,977 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:19:07,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:19:07,978 INFO L87 Difference]: Start difference. First operand 795 states and 1049 transitions. Second operand 7 states. [2019-10-13 19:19:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:09,534 INFO L93 Difference]: Finished difference Result 1181 states and 1582 transitions. [2019-10-13 19:19:09,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:19:09,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2019-10-13 19:19:09,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:09,546 INFO L225 Difference]: With dead ends: 1181 [2019-10-13 19:19:09,546 INFO L226 Difference]: Without dead ends: 1178 [2019-10-13 19:19:09,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:19:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2019-10-13 19:19:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 910. [2019-10-13 19:19:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2019-10-13 19:19:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1207 transitions. [2019-10-13 19:19:09,649 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1207 transitions. Word has length 41 [2019-10-13 19:19:09,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:09,649 INFO L462 AbstractCegarLoop]: Abstraction has 910 states and 1207 transitions. [2019-10-13 19:19:09,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:19:09,650 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1207 transitions. [2019-10-13 19:19:09,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 19:19:09,653 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:09,653 INFO L380 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:09,653 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:09,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:09,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2127814436, now seen corresponding path program 1 times [2019-10-13 19:19:09,654 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:09,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430084541] [2019-10-13 19:19:09,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:09,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:09,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:09,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430084541] [2019-10-13 19:19:09,828 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:09,828 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:19:09,828 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001429590] [2019-10-13 19:19:09,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:19:09,830 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:09,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:19:09,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:19:09,832 INFO L87 Difference]: Start difference. First operand 910 states and 1207 transitions. Second operand 6 states. [2019-10-13 19:19:10,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:10,961 INFO L93 Difference]: Finished difference Result 953 states and 1260 transitions. [2019-10-13 19:19:10,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:19:10,965 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2019-10-13 19:19:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:10,970 INFO L225 Difference]: With dead ends: 953 [2019-10-13 19:19:10,970 INFO L226 Difference]: Without dead ends: 950 [2019-10-13 19:19:10,971 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:19:10,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2019-10-13 19:19:11,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 921. [2019-10-13 19:19:11,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 921 states. [2019-10-13 19:19:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1219 transitions. [2019-10-13 19:19:11,046 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1219 transitions. Word has length 40 [2019-10-13 19:19:11,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:11,047 INFO L462 AbstractCegarLoop]: Abstraction has 921 states and 1219 transitions. [2019-10-13 19:19:11,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:19:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1219 transitions. [2019-10-13 19:19:11,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 19:19:11,048 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:11,048 INFO L380 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:11,049 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:11,049 INFO L82 PathProgramCache]: Analyzing trace with hash -277982875, now seen corresponding path program 1 times [2019-10-13 19:19:11,049 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:11,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910169792] [2019-10-13 19:19:11,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:11,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:11,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:11,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910169792] [2019-10-13 19:19:11,271 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:11,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 19:19:11,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794222447] [2019-10-13 19:19:11,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:19:11,273 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:11,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:19:11,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:19:11,274 INFO L87 Difference]: Start difference. First operand 921 states and 1219 transitions. Second operand 8 states. [2019-10-13 19:19:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:12,813 INFO L93 Difference]: Finished difference Result 1014 states and 1331 transitions. [2019-10-13 19:19:12,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:19:12,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-10-13 19:19:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:12,820 INFO L225 Difference]: With dead ends: 1014 [2019-10-13 19:19:12,820 INFO L226 Difference]: Without dead ends: 1009 [2019-10-13 19:19:12,821 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:19:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2019-10-13 19:19:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 960. [2019-10-13 19:19:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 960 states. [2019-10-13 19:19:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1264 transitions. [2019-10-13 19:19:12,895 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1264 transitions. Word has length 41 [2019-10-13 19:19:12,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:12,895 INFO L462 AbstractCegarLoop]: Abstraction has 960 states and 1264 transitions. [2019-10-13 19:19:12,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:19:12,896 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1264 transitions. [2019-10-13 19:19:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:19:12,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:12,897 INFO L380 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:12,897 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:12,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2048774711, now seen corresponding path program 1 times [2019-10-13 19:19:12,898 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:12,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893260757] [2019-10-13 19:19:12,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:12,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:12,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:13,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893260757] [2019-10-13 19:19:13,137 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:13,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-13 19:19:13,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345454842] [2019-10-13 19:19:13,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:19:13,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:13,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:19:13,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:19:13,138 INFO L87 Difference]: Start difference. First operand 960 states and 1264 transitions. Second operand 11 states. [2019-10-13 19:19:13,408 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2019-10-13 19:19:14,427 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-13 19:19:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:16,929 INFO L93 Difference]: Finished difference Result 1784 states and 2332 transitions. [2019-10-13 19:19:16,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 19:19:16,930 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2019-10-13 19:19:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:16,937 INFO L225 Difference]: With dead ends: 1784 [2019-10-13 19:19:16,937 INFO L226 Difference]: Without dead ends: 1159 [2019-10-13 19:19:16,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:19:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2019-10-13 19:19:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 945. [2019-10-13 19:19:17,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2019-10-13 19:19:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1229 transitions. [2019-10-13 19:19:17,024 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1229 transitions. Word has length 42 [2019-10-13 19:19:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:17,025 INFO L462 AbstractCegarLoop]: Abstraction has 945 states and 1229 transitions. [2019-10-13 19:19:17,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:19:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1229 transitions. [2019-10-13 19:19:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:19:17,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:17,026 INFO L380 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:17,026 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:17,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:17,027 INFO L82 PathProgramCache]: Analyzing trace with hash 424343062, now seen corresponding path program 1 times [2019-10-13 19:19:17,027 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:17,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806975374] [2019-10-13 19:19:17,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:17,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:17,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:17,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806975374] [2019-10-13 19:19:17,320 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:17,320 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2019-10-13 19:19:17,320 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769683084] [2019-10-13 19:19:17,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:19:17,321 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:17,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:19:17,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:19:17,326 INFO L87 Difference]: Start difference. First operand 945 states and 1229 transitions. Second operand 13 states. [2019-10-13 19:19:19,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:19,518 INFO L93 Difference]: Finished difference Result 1014 states and 1311 transitions. [2019-10-13 19:19:19,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:19:19,519 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2019-10-13 19:19:19,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:19,524 INFO L225 Difference]: With dead ends: 1014 [2019-10-13 19:19:19,525 INFO L226 Difference]: Without dead ends: 1008 [2019-10-13 19:19:19,525 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:19:19,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2019-10-13 19:19:19,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 945. [2019-10-13 19:19:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2019-10-13 19:19:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1228 transitions. [2019-10-13 19:19:19,606 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1228 transitions. Word has length 42 [2019-10-13 19:19:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:19,607 INFO L462 AbstractCegarLoop]: Abstraction has 945 states and 1228 transitions. [2019-10-13 19:19:19,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:19:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1228 transitions. [2019-10-13 19:19:19,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 19:19:19,608 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:19,608 INFO L380 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:19,609 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:19,609 INFO L82 PathProgramCache]: Analyzing trace with hash -590658574, now seen corresponding path program 1 times [2019-10-13 19:19:19,609 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:19,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694469616] [2019-10-13 19:19:19,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:19,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:19,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:19,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694469616] [2019-10-13 19:19:19,865 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:19,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2019-10-13 19:19:19,865 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030172012] [2019-10-13 19:19:19,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:19:19,866 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:19,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:19:19,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:19:19,866 INFO L87 Difference]: Start difference. First operand 945 states and 1228 transitions. Second operand 13 states. [2019-10-13 19:19:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:22,006 INFO L93 Difference]: Finished difference Result 1014 states and 1309 transitions. [2019-10-13 19:19:22,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:19:22,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2019-10-13 19:19:22,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:22,011 INFO L225 Difference]: With dead ends: 1014 [2019-10-13 19:19:22,011 INFO L226 Difference]: Without dead ends: 1008 [2019-10-13 19:19:22,012 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:19:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2019-10-13 19:19:22,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 945. [2019-10-13 19:19:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2019-10-13 19:19:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1227 transitions. [2019-10-13 19:19:22,093 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1227 transitions. Word has length 43 [2019-10-13 19:19:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:22,094 INFO L462 AbstractCegarLoop]: Abstraction has 945 states and 1227 transitions. [2019-10-13 19:19:22,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:19:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1227 transitions. [2019-10-13 19:19:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 19:19:22,095 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:22,095 INFO L380 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:22,095 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:22,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1046770881, now seen corresponding path program 1 times [2019-10-13 19:19:22,096 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:22,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866842861] [2019-10-13 19:19:22,096 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:22,096 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:22,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:22,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866842861] [2019-10-13 19:19:22,297 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:22,297 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 19:19:22,297 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169112708] [2019-10-13 19:19:22,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:19:22,298 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:22,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:19:22,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:19:22,299 INFO L87 Difference]: Start difference. First operand 945 states and 1227 transitions. Second operand 10 states. [2019-10-13 19:19:24,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:24,029 INFO L93 Difference]: Finished difference Result 1008 states and 1302 transitions. [2019-10-13 19:19:24,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:19:24,029 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2019-10-13 19:19:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:24,035 INFO L225 Difference]: With dead ends: 1008 [2019-10-13 19:19:24,036 INFO L226 Difference]: Without dead ends: 990 [2019-10-13 19:19:24,037 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:19:24,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2019-10-13 19:19:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 943. [2019-10-13 19:19:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2019-10-13 19:19:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1223 transitions. [2019-10-13 19:19:24,175 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1223 transitions. Word has length 44 [2019-10-13 19:19:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:24,176 INFO L462 AbstractCegarLoop]: Abstraction has 943 states and 1223 transitions. [2019-10-13 19:19:24,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:19:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1223 transitions. [2019-10-13 19:19:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 19:19:24,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:24,179 INFO L380 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:24,179 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:24,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:24,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1366251101, now seen corresponding path program 1 times [2019-10-13 19:19:24,180 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:24,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156736677] [2019-10-13 19:19:24,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:24,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:24,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:24,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156736677] [2019-10-13 19:19:24,529 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:24,530 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 19:19:24,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319574519] [2019-10-13 19:19:24,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:19:24,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:24,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:19:24,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:19:24,532 INFO L87 Difference]: Start difference. First operand 943 states and 1223 transitions. Second operand 8 states. [2019-10-13 19:19:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:27,125 INFO L93 Difference]: Finished difference Result 1062 states and 1346 transitions. [2019-10-13 19:19:27,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:19:27,126 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2019-10-13 19:19:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:27,130 INFO L225 Difference]: With dead ends: 1062 [2019-10-13 19:19:27,131 INFO L226 Difference]: Without dead ends: 723 [2019-10-13 19:19:27,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:19:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2019-10-13 19:19:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 651. [2019-10-13 19:19:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 19:19:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 812 transitions. [2019-10-13 19:19:27,232 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 812 transitions. Word has length 49 [2019-10-13 19:19:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:27,232 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 812 transitions. [2019-10-13 19:19:27,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:19:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 812 transitions. [2019-10-13 19:19:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 19:19:27,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:27,236 INFO L380 BasicCegarLoop]: 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, 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, 1] [2019-10-13 19:19:27,237 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:27,237 INFO L82 PathProgramCache]: Analyzing trace with hash -759882765, now seen corresponding path program 1 times [2019-10-13 19:19:27,238 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:27,238 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144732342] [2019-10-13 19:19:27,238 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:27,238 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:27,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:27,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144732342] [2019-10-13 19:19:27,533 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:27,533 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 19:19:27,533 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604236020] [2019-10-13 19:19:27,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:19:27,534 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:27,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:19:27,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:19:27,536 INFO L87 Difference]: Start difference. First operand 651 states and 812 transitions. Second operand 8 states. [2019-10-13 19:19:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:28,628 INFO L93 Difference]: Finished difference Result 977 states and 1229 transitions. [2019-10-13 19:19:28,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:19:28,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2019-10-13 19:19:28,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:28,631 INFO L225 Difference]: With dead ends: 977 [2019-10-13 19:19:28,631 INFO L226 Difference]: Without dead ends: 712 [2019-10-13 19:19:28,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:19:28,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2019-10-13 19:19:28,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 665. [2019-10-13 19:19:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2019-10-13 19:19:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 832 transitions. [2019-10-13 19:19:28,693 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 832 transitions. Word has length 58 [2019-10-13 19:19:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:28,694 INFO L462 AbstractCegarLoop]: Abstraction has 665 states and 832 transitions. [2019-10-13 19:19:28,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:19:28,694 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 832 transitions. [2019-10-13 19:19:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 19:19:28,695 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:28,695 INFO L380 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:28,695 INFO L410 AbstractCegarLoop]: === Iteration 15 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:28,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:28,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1429960054, now seen corresponding path program 1 times [2019-10-13 19:19:28,696 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:28,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896152388] [2019-10-13 19:19:28,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:28,697 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:28,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:19:28,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896152388] [2019-10-13 19:19:28,881 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:19:28,881 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 19:19:28,881 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247021084] [2019-10-13 19:19:28,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:19:28,881 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:19:28,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:19:28,882 INFO L87 Difference]: Start difference. First operand 665 states and 832 transitions. Second operand 8 states.