/usr/bin/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:07:25,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:07:25,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:07:25,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:07:25,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:07:25,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:07:25,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:07:25,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:07:25,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:07:25,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:07:25,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:07:25,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:07:25,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:07:25,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:07:25,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:07:25,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:07:25,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:07:25,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:07:25,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:07:25,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:07:25,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:07:25,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:07:25,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:07:25,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:07:25,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:07:25,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:07:25,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:07:25,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:07:25,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:07:25,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:07:25,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:07:25,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:07:25,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:07:25,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:07:25,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:07:25,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:07:25,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:07:25,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:07:25,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:07:25,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:07:25,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:07:25,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:07:25,573 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:07:25,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:07:25,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:07:25,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:07:25,575 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:07:25,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:07:25,575 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:07:25,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:07:25,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:07:25,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:07:25,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:07:25,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:07:25,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:07:25,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:07:25,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:07:25,577 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:07:25,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:07:25,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:07:25,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:07:25,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:07:25,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:07:25,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:07:25,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:07:25,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:07:25,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:07:25,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:07:25,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:07:25,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:07:25,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:07:25,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> log-additional-information=true; [2020-08-21 14:07:25,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:07:25,882 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:07:25,885 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:07:25,887 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:07:25,887 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:07:25,888 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-21 14:07:25,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6465cb423/b670ab1ed4e64a97a3962d805083a5b1/FLAG8734a6322 [2020-08-21 14:07:26,453 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:07:26,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-21 14:07:26,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6465cb423/b670ab1ed4e64a97a3962d805083a5b1/FLAG8734a6322 [2020-08-21 14:07:26,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6465cb423/b670ab1ed4e64a97a3962d805083a5b1 [2020-08-21 14:07:26,832 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:07:26,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:07:26,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:26,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:07:26,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:07:26,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:26" (1/1) ... [2020-08-21 14:07:26,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34e5dc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:26, skipping insertion in model container [2020-08-21 14:07:26,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:26" (1/1) ... [2020-08-21 14:07:26,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:07:26,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:07:27,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:27,315 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:07:27,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:27,429 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:07:27,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:27 WrapperNode [2020-08-21 14:07:27,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:27,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:07:27,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:07:27,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:07:27,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:27" (1/1) ... [2020-08-21 14:07:27,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:27" (1/1) ... [2020-08-21 14:07:27,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:27" (1/1) ... [2020-08-21 14:07:27,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:27" (1/1) ... [2020-08-21 14:07:27,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:27" (1/1) ... [2020-08-21 14:07:27,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:27" (1/1) ... [2020-08-21 14:07:27,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:27" (1/1) ... [2020-08-21 14:07:27,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:07:27,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:07:27,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:07:27,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:07:27,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 14:07:27,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:07:27,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:07:27,570 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2020-08-21 14:07:27,570 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2020-08-21 14:07:27,571 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_PnP [2020-08-21 14:07:27,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:07:27,571 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2020-08-21 14:07:27,577 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2020-08-21 14:07:27,577 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2020-08-21 14:07:27,577 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2020-08-21 14:07:27,578 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2020-08-21 14:07:27,578 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2020-08-21 14:07:27,579 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2020-08-21 14:07:27,579 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2020-08-21 14:07:27,579 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Power [2020-08-21 14:07:27,579 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2020-08-21 14:07:27,579 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_InternIoCtl [2020-08-21 14:07:27,579 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2020-08-21 14:07:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:07:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 14:07:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:07:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 14:07:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_PnP [2020-08-21 14:07:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2020-08-21 14:07:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2020-08-21 14:07:27,580 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2020-08-21 14:07:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2020-08-21 14:07:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2020-08-21 14:07:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2020-08-21 14:07:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Power [2020-08-21 14:07:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2020-08-21 14:07:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_InternIoCtl [2020-08-21 14:07:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2020-08-21 14:07:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2020-08-21 14:07:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2020-08-21 14:07:27,581 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2020-08-21 14:07:27,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:07:27,582 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2020-08-21 14:07:27,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:07:27,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:07:27,859 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 14:07:27,934 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2020-08-21 14:07:27,934 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2020-08-21 14:07:27,960 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 14:07:28,064 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2020-08-21 14:07:28,064 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2020-08-21 14:07:28,066 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 14:07:28,127 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-21 14:07:28,128 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-21 14:07:28,136 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 14:07:28,192 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-21 14:07:28,192 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-21 14:07:28,312 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 14:07:28,348 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2020-08-21 14:07:28,348 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2020-08-21 14:07:28,389 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 14:07:28,511 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume false; [2020-08-21 14:07:28,511 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume !false; [2020-08-21 14:07:28,530 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:07:28,530 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 14:07:28,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:28 BoogieIcfgContainer [2020-08-21 14:07:28,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:07:28,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:07:28,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:07:28,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:07:28,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:07:26" (1/3) ... [2020-08-21 14:07:28,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5039f6b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:07:28, skipping insertion in model container [2020-08-21 14:07:28,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:27" (2/3) ... [2020-08-21 14:07:28,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5039f6b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:07:28, skipping insertion in model container [2020-08-21 14:07:28,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:28" (3/3) ... [2020-08-21 14:07:28,547 INFO L109 eAbstractionObserver]: Analyzing ICFG kbfiltr_simpl2.cil-2.c [2020-08-21 14:07:28,558 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:07:28,567 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:07:28,582 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:07:28,611 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:07:28,612 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:07:28,612 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:07:28,612 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:07:28,612 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:07:28,613 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:07:28,613 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:07:28,613 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:07:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states. [2020-08-21 14:07:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:07:28,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:28,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:28,667 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1129426977, now seen corresponding path program 1 times [2020-08-21 14:07:28,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:28,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94107348] [2020-08-21 14:07:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:29,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:29,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:29,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94107348] [2020-08-21 14:07:29,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:29,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:07:29,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488430354] [2020-08-21 14:07:29,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:07:29,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:29,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:07:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:07:29,168 INFO L87 Difference]: Start difference. First operand 240 states. Second operand 5 states. [2020-08-21 14:07:30,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:30,178 INFO L93 Difference]: Finished difference Result 418 states and 629 transitions. [2020-08-21 14:07:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:07:30,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 14:07:30,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:30,197 INFO L225 Difference]: With dead ends: 418 [2020-08-21 14:07:30,197 INFO L226 Difference]: Without dead ends: 259 [2020-08-21 14:07:30,204 INFO L675 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 [2020-08-21 14:07:30,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-21 14:07:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2020-08-21 14:07:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-21 14:07:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 326 transitions. [2020-08-21 14:07:30,302 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 326 transitions. Word has length 20 [2020-08-21 14:07:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:30,303 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 326 transitions. [2020-08-21 14:07:30,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:07:30,303 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 326 transitions. [2020-08-21 14:07:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:07:30,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:30,305 INFO L422 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] [2020-08-21 14:07:30,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:07:30,306 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:30,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:30,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1811427322, now seen corresponding path program 1 times [2020-08-21 14:07:30,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:30,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664584525] [2020-08-21 14:07:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:30,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:30,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:30,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:30,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664584525] [2020-08-21 14:07:30,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:30,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:07:30,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920825757] [2020-08-21 14:07:30,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:07:30,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:30,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:07:30,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:07:30,555 INFO L87 Difference]: Start difference. First operand 231 states and 326 transitions. Second operand 6 states. [2020-08-21 14:07:31,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:31,829 INFO L93 Difference]: Finished difference Result 410 states and 565 transitions. [2020-08-21 14:07:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:07:31,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 14:07:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:31,833 INFO L225 Difference]: With dead ends: 410 [2020-08-21 14:07:31,834 INFO L226 Difference]: Without dead ends: 349 [2020-08-21 14:07:31,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:07:31,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-21 14:07:31,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 304. [2020-08-21 14:07:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 14:07:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 415 transitions. [2020-08-21 14:07:31,879 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 415 transitions. Word has length 28 [2020-08-21 14:07:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:31,879 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 415 transitions. [2020-08-21 14:07:31,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:07:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 415 transitions. [2020-08-21 14:07:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:07:31,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:31,881 INFO L422 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] [2020-08-21 14:07:31,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:07:31,881 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:31,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:31,882 INFO L82 PathProgramCache]: Analyzing trace with hash 439620198, now seen corresponding path program 1 times [2020-08-21 14:07:31,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:31,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285064013] [2020-08-21 14:07:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:32,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:32,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:32,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:32,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285064013] [2020-08-21 14:07:32,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:32,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:07:32,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870539519] [2020-08-21 14:07:32,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:07:32,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:32,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:07:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:07:32,111 INFO L87 Difference]: Start difference. First operand 304 states and 415 transitions. Second operand 6 states. [2020-08-21 14:07:32,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:32,918 INFO L93 Difference]: Finished difference Result 487 states and 647 transitions. [2020-08-21 14:07:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:07:32,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 14:07:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:32,929 INFO L225 Difference]: With dead ends: 487 [2020-08-21 14:07:32,929 INFO L226 Difference]: Without dead ends: 368 [2020-08-21 14:07:32,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:07:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-21 14:07:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2020-08-21 14:07:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-21 14:07:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 466 transitions. [2020-08-21 14:07:33,009 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 466 transitions. Word has length 28 [2020-08-21 14:07:33,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:33,012 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 466 transitions. [2020-08-21 14:07:33,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:07:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 466 transitions. [2020-08-21 14:07:33,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 14:07:33,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:33,025 INFO L422 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] [2020-08-21 14:07:33,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:07:33,025 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:33,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:33,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1607848921, now seen corresponding path program 1 times [2020-08-21 14:07:33,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:33,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815629468] [2020-08-21 14:07:33,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:33,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:33,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:33,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:33,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815629468] [2020-08-21 14:07:33,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:33,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:07:33,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530143765] [2020-08-21 14:07:33,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:07:33,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:33,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:07:33,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:07:33,235 INFO L87 Difference]: Start difference. First operand 344 states and 466 transitions. Second operand 6 states. [2020-08-21 14:07:34,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:34,034 INFO L93 Difference]: Finished difference Result 347 states and 468 transitions. [2020-08-21 14:07:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:07:34,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-21 14:07:34,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:34,038 INFO L225 Difference]: With dead ends: 347 [2020-08-21 14:07:34,038 INFO L226 Difference]: Without dead ends: 343 [2020-08-21 14:07:34,039 INFO L675 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 [2020-08-21 14:07:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-08-21 14:07:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2020-08-21 14:07:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-21 14:07:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 463 transitions. [2020-08-21 14:07:34,067 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 463 transitions. Word has length 38 [2020-08-21 14:07:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:34,068 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 463 transitions. [2020-08-21 14:07:34,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:07:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 463 transitions. [2020-08-21 14:07:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 14:07:34,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:34,070 INFO L422 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] [2020-08-21 14:07:34,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:07:34,071 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:34,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1742109340, now seen corresponding path program 1 times [2020-08-21 14:07:34,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:34,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782919143] [2020-08-21 14:07:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:34,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:34,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:34,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:34,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:07:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:34,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782919143] [2020-08-21 14:07:34,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:34,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:07:34,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450931343] [2020-08-21 14:07:34,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:07:34,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:34,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:07:34,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:07:34,280 INFO L87 Difference]: Start difference. First operand 343 states and 463 transitions. Second operand 8 states. [2020-08-21 14:07:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:35,358 INFO L93 Difference]: Finished difference Result 394 states and 520 transitions. [2020-08-21 14:07:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:07:35,358 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-21 14:07:35,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:35,361 INFO L225 Difference]: With dead ends: 394 [2020-08-21 14:07:35,361 INFO L226 Difference]: Without dead ends: 325 [2020-08-21 14:07:35,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:07:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-08-21 14:07:35,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2020-08-21 14:07:35,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 14:07:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 406 transitions. [2020-08-21 14:07:35,386 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 406 transitions. Word has length 46 [2020-08-21 14:07:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:35,387 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 406 transitions. [2020-08-21 14:07:35,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:07:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 406 transitions. [2020-08-21 14:07:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 14:07:35,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:35,389 INFO L422 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] [2020-08-21 14:07:35,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:07:35,389 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash 750041855, now seen corresponding path program 1 times [2020-08-21 14:07:35,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:35,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870144546] [2020-08-21 14:07:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:35,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:35,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:35,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:35,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:07:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:35,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 14:07:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:35,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870144546] [2020-08-21 14:07:35,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:35,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:07:35,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087118827] [2020-08-21 14:07:35,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:07:35,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:35,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:07:35,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:07:35,593 INFO L87 Difference]: Start difference. First operand 304 states and 406 transitions. Second operand 8 states. [2020-08-21 14:07:36,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:36,043 INFO L93 Difference]: Finished difference Result 316 states and 421 transitions. [2020-08-21 14:07:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:07:36,044 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-21 14:07:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:36,047 INFO L225 Difference]: With dead ends: 316 [2020-08-21 14:07:36,047 INFO L226 Difference]: Without dead ends: 300 [2020-08-21 14:07:36,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:07:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-08-21 14:07:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-08-21 14:07:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-08-21 14:07:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2020-08-21 14:07:36,070 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 364 transitions. Word has length 45 [2020-08-21 14:07:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:36,070 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 364 transitions. [2020-08-21 14:07:36,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:07:36,070 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 364 transitions. [2020-08-21 14:07:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 14:07:36,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:36,072 INFO L422 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] [2020-08-21 14:07:36,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:07:36,072 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1784783245, now seen corresponding path program 1 times [2020-08-21 14:07:36,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:36,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576605543] [2020-08-21 14:07:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:36,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:36,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:36,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:36,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:07:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:36,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 14:07:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:36,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576605543] [2020-08-21 14:07:36,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:36,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:07:36,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104030102] [2020-08-21 14:07:36,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:07:36,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:36,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:07:36,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:07:36,267 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 8 states. [2020-08-21 14:07:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:37,203 INFO L93 Difference]: Finished difference Result 290 states and 385 transitions. [2020-08-21 14:07:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:07:37,204 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-21 14:07:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:37,207 INFO L225 Difference]: With dead ends: 290 [2020-08-21 14:07:37,207 INFO L226 Difference]: Without dead ends: 242 [2020-08-21 14:07:37,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:07:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-21 14:07:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-08-21 14:07:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-21 14:07:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 321 transitions. [2020-08-21 14:07:37,225 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 321 transitions. Word has length 46 [2020-08-21 14:07:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:37,226 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 321 transitions. [2020-08-21 14:07:37,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:07:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 321 transitions. [2020-08-21 14:07:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 14:07:37,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:37,228 INFO L422 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] [2020-08-21 14:07:37,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:07:37,228 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:37,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1852297644, now seen corresponding path program 1 times [2020-08-21 14:07:37,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:37,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843122146] [2020-08-21 14:07:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:37,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:37,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:37,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:37,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:07:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:37,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:07:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:37,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 14:07:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:37,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843122146] [2020-08-21 14:07:37,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:37,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:07:37,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472282331] [2020-08-21 14:07:37,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:07:37,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:37,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:07:37,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:07:37,406 INFO L87 Difference]: Start difference. First operand 242 states and 321 transitions. Second operand 8 states. [2020-08-21 14:07:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:37,979 INFO L93 Difference]: Finished difference Result 270 states and 354 transitions. [2020-08-21 14:07:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:07:37,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-08-21 14:07:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:37,982 INFO L225 Difference]: With dead ends: 270 [2020-08-21 14:07:37,982 INFO L226 Difference]: Without dead ends: 240 [2020-08-21 14:07:37,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:07:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-21 14:07:37,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-08-21 14:07:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-21 14:07:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 317 transitions. [2020-08-21 14:07:38,001 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 317 transitions. Word has length 53 [2020-08-21 14:07:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:38,001 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 317 transitions. [2020-08-21 14:07:38,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:07:38,001 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 317 transitions. [2020-08-21 14:07:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 14:07:38,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:38,003 INFO L422 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] [2020-08-21 14:07:38,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:07:38,003 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:38,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1745163498, now seen corresponding path program 1 times [2020-08-21 14:07:38,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:38,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798677431] [2020-08-21 14:07:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:38,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:38,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:38,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:38,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 14:07:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:38,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:07:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:38,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798677431] [2020-08-21 14:07:38,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:38,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:07:38,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940343555] [2020-08-21 14:07:38,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:07:38,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:38,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:07:38,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:07:38,256 INFO L87 Difference]: Start difference. First operand 240 states and 317 transitions. Second operand 9 states. [2020-08-21 14:07:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:39,593 INFO L93 Difference]: Finished difference Result 313 states and 400 transitions. [2020-08-21 14:07:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:07:39,594 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-08-21 14:07:39,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:39,597 INFO L225 Difference]: With dead ends: 313 [2020-08-21 14:07:39,597 INFO L226 Difference]: Without dead ends: 307 [2020-08-21 14:07:39,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:07:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-08-21 14:07:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 274. [2020-08-21 14:07:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-08-21 14:07:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 356 transitions. [2020-08-21 14:07:39,620 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 356 transitions. Word has length 51 [2020-08-21 14:07:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:39,620 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 356 transitions. [2020-08-21 14:07:39,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:07:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 356 transitions. [2020-08-21 14:07:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 14:07:39,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:39,622 INFO L422 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] [2020-08-21 14:07:39,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:07:39,622 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash -855964733, now seen corresponding path program 1 times [2020-08-21 14:07:39,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:39,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440318128] [2020-08-21 14:07:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 14:07:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:07:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:39,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440318128] [2020-08-21 14:07:39,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:39,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 14:07:39,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550551850] [2020-08-21 14:07:39,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:07:39,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:39,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:07:39,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:07:39,849 INFO L87 Difference]: Start difference. First operand 274 states and 356 transitions. Second operand 13 states. [2020-08-21 14:07:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,847 INFO L93 Difference]: Finished difference Result 325 states and 410 transitions. [2020-08-21 14:07:41,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 14:07:41,847 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-08-21 14:07:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,849 INFO L225 Difference]: With dead ends: 325 [2020-08-21 14:07:41,850 INFO L226 Difference]: Without dead ends: 284 [2020-08-21 14:07:41,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-08-21 14:07:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-21 14:07:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2020-08-21 14:07:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-21 14:07:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 315 transitions. [2020-08-21 14:07:41,878 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 315 transitions. Word has length 52 [2020-08-21 14:07:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,879 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 315 transitions. [2020-08-21 14:07:41,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:07:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 315 transitions. [2020-08-21 14:07:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 14:07:41,882 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,882 INFO L422 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] [2020-08-21 14:07:41,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:07:41,883 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash 240184037, now seen corresponding path program 1 times [2020-08-21 14:07:41,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273669848] [2020-08-21 14:07:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 14:07:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:07:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:42,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273669848] [2020-08-21 14:07:42,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:42,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 14:07:42,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239246478] [2020-08-21 14:07:42,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:07:42,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:42,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:07:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:07:42,148 INFO L87 Difference]: Start difference. First operand 240 states and 315 transitions. Second operand 12 states. [2020-08-21 14:07:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:43,263 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2020-08-21 14:07:43,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:07:43,264 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-08-21 14:07:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:43,266 INFO L225 Difference]: With dead ends: 252 [2020-08-21 14:07:43,267 INFO L226 Difference]: Without dead ends: 211 [2020-08-21 14:07:43,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:07:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-08-21 14:07:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-08-21 14:07:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-21 14:07:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-21 14:07:43,285 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 53 [2020-08-21 14:07:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:43,285 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-21 14:07:43,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:07:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-21 14:07:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 14:07:43,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:43,287 INFO L422 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] [2020-08-21 14:07:43,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:07:43,287 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:43,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1569125, now seen corresponding path program 1 times [2020-08-21 14:07:43,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:43,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188668679] [2020-08-21 14:07:43,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:07:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:43,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188668679] [2020-08-21 14:07:43,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:43,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 14:07:43,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049797457] [2020-08-21 14:07:43,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:07:43,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:43,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:07:43,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:07:43,521 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 14 states. [2020-08-21 14:07:44,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:44,627 INFO L93 Difference]: Finished difference Result 227 states and 292 transitions. [2020-08-21 14:07:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:07:44,627 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-08-21 14:07:44,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:44,629 INFO L225 Difference]: With dead ends: 227 [2020-08-21 14:07:44,629 INFO L226 Difference]: Without dead ends: 206 [2020-08-21 14:07:44,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:07:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-21 14:07:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-21 14:07:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 14:07:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2020-08-21 14:07:44,648 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 54 [2020-08-21 14:07:44,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:44,648 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2020-08-21 14:07:44,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:07:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2020-08-21 14:07:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 14:07:44,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:44,650 INFO L422 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] [2020-08-21 14:07:44,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:07:44,650 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:44,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1204113239, now seen corresponding path program 1 times [2020-08-21 14:07:44,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:44,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754198623] [2020-08-21 14:07:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:07:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:07:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:07:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:44,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754198623] [2020-08-21 14:07:44,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:44,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 14:07:44,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626641005] [2020-08-21 14:07:44,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:07:44,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:44,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:07:44,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:07:44,879 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand 11 states. [2020-08-21 14:07:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,688 INFO L93 Difference]: Finished difference Result 296 states and 379 transitions. [2020-08-21 14:07:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:07:45,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-21 14:07:45,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,692 INFO L225 Difference]: With dead ends: 296 [2020-08-21 14:07:45,692 INFO L226 Difference]: Without dead ends: 224 [2020-08-21 14:07:45,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:07:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-08-21 14:07:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 214. [2020-08-21 14:07:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-21 14:07:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 278 transitions. [2020-08-21 14:07:45,711 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 278 transitions. Word has length 57 [2020-08-21 14:07:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,712 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 278 transitions. [2020-08-21 14:07:45,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:07:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 278 transitions. [2020-08-21 14:07:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 14:07:45,714 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,714 INFO L422 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] [2020-08-21 14:07:45,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:07:45,714 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,715 INFO L82 PathProgramCache]: Analyzing trace with hash -527681510, now seen corresponding path program 1 times [2020-08-21 14:07:45,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915997700] [2020-08-21 14:07:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:07:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:07:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:07:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:45,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915997700] [2020-08-21 14:07:45,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 14:07:45,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378628823] [2020-08-21 14:07:45,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:07:45,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:07:45,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:07:45,973 INFO L87 Difference]: Start difference. First operand 214 states and 278 transitions. Second operand 11 states. [2020-08-21 14:07:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:46,845 INFO L93 Difference]: Finished difference Result 232 states and 299 transitions. [2020-08-21 14:07:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:07:46,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-21 14:07:46,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:46,848 INFO L225 Difference]: With dead ends: 232 [2020-08-21 14:07:46,849 INFO L226 Difference]: Without dead ends: 225 [2020-08-21 14:07:46,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:07:46,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-08-21 14:07:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 215. [2020-08-21 14:07:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-21 14:07:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 279 transitions. [2020-08-21 14:07:46,879 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 279 transitions. Word has length 57 [2020-08-21 14:07:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:46,880 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 279 transitions. [2020-08-21 14:07:46,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:07:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 279 transitions. [2020-08-21 14:07:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 14:07:46,882 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:46,884 INFO L422 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, 1, 1] [2020-08-21 14:07:46,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:07:46,885 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1045578754, now seen corresponding path program 1 times [2020-08-21 14:07:46,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:46,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923116819] [2020-08-21 14:07:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:07:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 14:07:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:07:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:47,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923116819] [2020-08-21 14:07:47,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:47,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:07:47,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749173956] [2020-08-21 14:07:47,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:07:47,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:47,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:07:47,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:07:47,147 INFO L87 Difference]: Start difference. First operand 215 states and 279 transitions. Second operand 8 states. [2020-08-21 14:07:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:47,792 INFO L93 Difference]: Finished difference Result 258 states and 327 transitions. [2020-08-21 14:07:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:07:47,792 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-08-21 14:07:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:47,794 INFO L225 Difference]: With dead ends: 258 [2020-08-21 14:07:47,794 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 14:07:47,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:07:47,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 14:07:47,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-08-21 14:07:47,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-21 14:07:47,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 274 transitions. [2020-08-21 14:07:47,813 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 274 transitions. Word has length 60 [2020-08-21 14:07:47,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:47,814 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 274 transitions. [2020-08-21 14:07:47,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:07:47,814 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 274 transitions. [2020-08-21 14:07:47,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 14:07:47,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:47,815 INFO L422 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, 1, 1, 1] [2020-08-21 14:07:47,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:07:47,816 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:47,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:47,816 INFO L82 PathProgramCache]: Analyzing trace with hash -930292561, now seen corresponding path program 1 times [2020-08-21 14:07:47,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:47,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757371644] [2020-08-21 14:07:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:07:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:48,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:07:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:48,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:07:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:48,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757371644] [2020-08-21 14:07:48,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:48,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-21 14:07:48,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772251588] [2020-08-21 14:07:48,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 14:07:48,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:48,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 14:07:48,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:07:48,105 INFO L87 Difference]: Start difference. First operand 214 states and 274 transitions. Second operand 15 states. [2020-08-21 14:07:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:49,354 INFO L93 Difference]: Finished difference Result 226 states and 286 transitions. [2020-08-21 14:07:49,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:07:49,360 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-08-21 14:07:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:49,362 INFO L225 Difference]: With dead ends: 226 [2020-08-21 14:07:49,362 INFO L226 Difference]: Without dead ends: 188 [2020-08-21 14:07:49,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:07:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-21 14:07:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-08-21 14:07:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 14:07:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 236 transitions. [2020-08-21 14:07:49,377 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 236 transitions. Word has length 61 [2020-08-21 14:07:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:49,378 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 236 transitions. [2020-08-21 14:07:49,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 14:07:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 236 transitions. [2020-08-21 14:07:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 14:07:49,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:49,379 INFO L422 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] [2020-08-21 14:07:49,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:07:49,380 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1127735086, now seen corresponding path program 1 times [2020-08-21 14:07:49,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:49,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677731186] [2020-08-21 14:07:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:07:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 14:07:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:07:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:49,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677731186] [2020-08-21 14:07:49,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:49,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-21 14:07:49,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428981979] [2020-08-21 14:07:49,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 14:07:49,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:49,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 14:07:49,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:07:49,690 INFO L87 Difference]: Start difference. First operand 188 states and 236 transitions. Second operand 15 states. [2020-08-21 14:07:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:50,592 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2020-08-21 14:07:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:07:50,592 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-08-21 14:07:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:50,594 INFO L225 Difference]: With dead ends: 200 [2020-08-21 14:07:50,594 INFO L226 Difference]: Without dead ends: 186 [2020-08-21 14:07:50,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:07:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-21 14:07:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-08-21 14:07:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-21 14:07:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 232 transitions. [2020-08-21 14:07:50,613 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 232 transitions. Word has length 56 [2020-08-21 14:07:50,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:50,614 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 232 transitions. [2020-08-21 14:07:50,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 14:07:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 232 transitions. [2020-08-21 14:07:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 14:07:50,615 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:50,616 INFO L422 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] [2020-08-21 14:07:50,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:07:50,616 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:50,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1554463583, now seen corresponding path program 1 times [2020-08-21 14:07:50,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:50,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8574318] [2020-08-21 14:07:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:07:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 14:07:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:50,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8574318] [2020-08-21 14:07:50,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:50,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 14:07:50,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779099365] [2020-08-21 14:07:50,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:07:50,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:50,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:07:50,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:07:50,927 INFO L87 Difference]: Start difference. First operand 186 states and 232 transitions. Second operand 13 states. [2020-08-21 14:07:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:52,156 INFO L93 Difference]: Finished difference Result 237 states and 286 transitions. [2020-08-21 14:07:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:07:52,156 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-08-21 14:07:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:52,158 INFO L225 Difference]: With dead ends: 237 [2020-08-21 14:07:52,158 INFO L226 Difference]: Without dead ends: 220 [2020-08-21 14:07:52,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-08-21 14:07:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-21 14:07:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2020-08-21 14:07:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-21 14:07:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 237 transitions. [2020-08-21 14:07:52,175 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 237 transitions. Word has length 55 [2020-08-21 14:07:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:52,175 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 237 transitions. [2020-08-21 14:07:52,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:07:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 237 transitions. [2020-08-21 14:07:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 14:07:52,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:52,176 INFO L422 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] [2020-08-21 14:07:52,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:07:52,177 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:52,177 INFO L82 PathProgramCache]: Analyzing trace with hash -725184292, now seen corresponding path program 1 times [2020-08-21 14:07:52,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:52,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079955019] [2020-08-21 14:07:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:07:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 14:07:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:52,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079955019] [2020-08-21 14:07:52,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:52,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 14:07:52,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576396024] [2020-08-21 14:07:52,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:07:52,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:52,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:07:52,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:07:52,440 INFO L87 Difference]: Start difference. First operand 190 states and 237 transitions. Second operand 14 states. [2020-08-21 14:07:53,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:53,412 INFO L93 Difference]: Finished difference Result 206 states and 253 transitions. [2020-08-21 14:07:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:07:53,413 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-08-21 14:07:53,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:53,414 INFO L225 Difference]: With dead ends: 206 [2020-08-21 14:07:53,414 INFO L226 Difference]: Without dead ends: 168 [2020-08-21 14:07:53,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:07:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-21 14:07:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-08-21 14:07:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 14:07:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2020-08-21 14:07:53,426 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 55 [2020-08-21 14:07:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:53,426 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2020-08-21 14:07:53,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:07:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2020-08-21 14:07:53,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 14:07:53,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:53,427 INFO L422 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] [2020-08-21 14:07:53,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 14:07:53,428 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:53,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:53,428 INFO L82 PathProgramCache]: Analyzing trace with hash -639520605, now seen corresponding path program 1 times [2020-08-21 14:07:53,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:53,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202162668] [2020-08-21 14:07:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:53,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:53,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:07:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:53,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:07:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:53,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:07:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:53,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:07:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:53,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:07:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:53,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202162668] [2020-08-21 14:07:53,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:53,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 14:07:53,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070344176] [2020-08-21 14:07:53,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:07:53,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:53,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:07:53,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:07:53,634 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand 10 states. [2020-08-21 14:07:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:54,023 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2020-08-21 14:07:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:07:54,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-08-21 14:07:54,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:54,026 INFO L225 Difference]: With dead ends: 204 [2020-08-21 14:07:54,026 INFO L226 Difference]: Without dead ends: 162 [2020-08-21 14:07:54,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:07:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-21 14:07:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-08-21 14:07:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-21 14:07:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2020-08-21 14:07:54,050 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 58 [2020-08-21 14:07:54,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:54,051 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2020-08-21 14:07:54,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:07:54,051 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2020-08-21 14:07:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 14:07:54,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:54,055 INFO L422 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] [2020-08-21 14:07:54,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 14:07:54,055 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:54,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1656625880, now seen corresponding path program 1 times [2020-08-21 14:07:54,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:54,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790657056] [2020-08-21 14:07:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:07:54,114 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:07:54,114 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:07:54,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 14:07:54,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:07:54 BoogieIcfgContainer [2020-08-21 14:07:54,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:07:54,151 INFO L168 Benchmark]: Toolchain (without parser) took 27316.30 ms. Allocated memory was 140.5 MB in the beginning and 514.9 MB in the end (delta: 374.3 MB). Free memory was 103.1 MB in the beginning and 476.0 MB in the end (delta: -372.9 MB). Peak memory consumption was 387.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:54,151 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:07:54,152 INFO L168 Benchmark]: CACSL2BoogieTranslator took 594.07 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 102.9 MB in the beginning and 173.3 MB in the end (delta: -70.4 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:54,153 INFO L168 Benchmark]: Boogie Preprocessor took 84.05 ms. Allocated memory is still 203.4 MB. Free memory was 173.3 MB in the beginning and 169.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:54,153 INFO L168 Benchmark]: RCFGBuilder took 1022.43 ms. Allocated memory is still 203.4 MB. Free memory was 169.9 MB in the beginning and 98.4 MB in the end (delta: 71.5 MB). Peak memory consumption was 71.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:54,154 INFO L168 Benchmark]: TraceAbstraction took 25609.62 ms. Allocated memory was 203.4 MB in the beginning and 514.9 MB in the end (delta: 311.4 MB). Free memory was 98.4 MB in the beginning and 476.0 MB in the end (delta: -377.5 MB). Peak memory consumption was 320.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:54,157 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 594.07 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 102.9 MB in the beginning and 173.3 MB in the end (delta: -70.4 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 84.05 ms. Allocated memory is still 203.4 MB. Free memory was 173.3 MB in the beginning and 169.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1022.43 ms. Allocated memory is still 203.4 MB. Free memory was 169.9 MB in the beginning and 98.4 MB in the end (delta: 71.5 MB). Peak memory consumption was 71.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 25609.62 ms. Allocated memory was 203.4 MB in the beginning and 514.9 MB in the end (delta: 311.4 MB). Free memory was 98.4 MB in the beginning and 476.0 MB in the end (delta: -377.5 MB). Peak memory consumption was 320.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1011]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int KernelMode ; [L22] int Executive ; [L23] int DevicePowerState ; [L24] int s ; [L25] int UNLOADED ; [L26] int NP ; [L27] int DC ; [L28] int SKIP1 ; [L29] int SKIP2 ; [L30] int MPR1 ; [L31] int MPR3 ; [L32] int IPC ; [L33] int pended ; [L34] int compFptr ; [L35] int compRegistered ; [L36] int lowerDriverReturn ; [L37] int setEventCalled ; [L38] int customIrp ; [L39] int myStatus ; [L292] int status ; [L293] int irp = __VERIFIER_nondet_int() ; [L294] int pirp ; [L295] int pirp__IoStatus__Status ; [L296] int irp_choice = __VERIFIER_nondet_int() ; [L297] int devobj = __VERIFIER_nondet_int() ; [L298] int __cil_tmp8 ; [L300] KernelMode = 0 [L301] Executive = 0 [L302] DevicePowerState = 1 [L303] s = 0 [L304] UNLOADED = 0 [L305] NP = 0 [L306] DC = 0 [L307] SKIP1 = 0 [L308] SKIP2 = 0 [L309] MPR1 = 0 [L310] MPR3 = 0 [L311] IPC = 0 [L312] pended = 0 [L313] compFptr = 0 [L314] compRegistered = 0 [L315] lowerDriverReturn = 0 [L316] setEventCalled = 0 [L317] customIrp = 0 [L318] myStatus = 0 [L322] status = 0 [L323] pirp = irp [L324] CALL _BLAST_init() [L59] UNLOADED = 0 [L60] NP = 1 [L61] DC = 2 [L62] SKIP1 = 3 [L63] SKIP2 = 4 [L64] MPR1 = 5 [L65] MPR3 = 6 [L66] IPC = 7 [L67] s = UNLOADED [L68] pended = 0 [L69] compFptr = 0 [L70] compRegistered = 0 [L71] lowerDriverReturn = 0 [L72] setEventCalled = 0 [L73] customIrp = 0 [L324] RET _BLAST_init() [L326] COND TRUE status >= 0 [L327] s = NP [L328] customIrp = 0 [L329] setEventCalled = customIrp [L330] lowerDriverReturn = setEventCalled [L331] compRegistered = lowerDriverReturn [L332] pended = compRegistered [L333] pirp__IoStatus__Status = 0 [L334] myStatus = 0 [L335] COND FALSE !(irp_choice == 0) [L340] CALL stub_driver_init() [L45] s = NP [L46] pended = 0 [L47] compFptr = 0 [L48] compRegistered = 0 [L49] lowerDriverReturn = 0 [L50] setEventCalled = 0 [L51] customIrp = 0 [L340] RET stub_driver_init() [L343] COND FALSE !(status < 0) [L347] int tmp_ndt_1; [L348] tmp_ndt_1 = __VERIFIER_nondet_int() [L349] COND FALSE !(tmp_ndt_1 == 0) [L352] int tmp_ndt_2; [L353] tmp_ndt_2 = __VERIFIER_nondet_int() [L354] COND FALSE !(tmp_ndt_2 == 1) [L357] int tmp_ndt_3; [L358] tmp_ndt_3 = __VERIFIER_nondet_int() [L359] COND TRUE tmp_ndt_3 == 3 [L386] CALL, EXPR KbFilter_PnP(devobj, pirp) [L78] int devExt ; [L79] int irpStack ; [L80] int status ; [L81] int event = __VERIFIER_nondet_int() ; [L82] int DeviceObject__DeviceExtension = __VERIFIER_nondet_int() ; [L83] int Irp__Tail__Overlay__CurrentStackLocation = __VERIFIER_nondet_int() ; [L84] int irpStack__MinorFunction = __VERIFIER_nondet_int() ; [L85] int devExt__TopOfStack = __VERIFIER_nondet_int() ; [L86] int devExt__Started ; [L87] int devExt__Removed ; [L88] int devExt__SurpriseRemoved ; [L89] int Irp__IoStatus__Status ; [L90] int Irp__IoStatus__Information ; [L91] int Irp__CurrentLocation = __VERIFIER_nondet_int() ; [L92] int irpSp ; [L93] int nextIrpSp ; [L94] int nextIrpSp__Control ; [L95] int irpSp___0 ; [L96] int irpSp__Context ; [L97] int irpSp__Control ; [L98] long __cil_tmp23 ; [L101] status = 0 [L102] devExt = DeviceObject__DeviceExtension [L103] irpStack = Irp__Tail__Overlay__CurrentStackLocation [L104] COND FALSE !(irpStack__MinorFunction == 0) [L107] COND FALSE !(irpStack__MinorFunction == 23) [L110] COND TRUE irpStack__MinorFunction == 2 [L234] devExt__Removed = 1 [L235] COND TRUE s == NP [L236] s = SKIP1 [L243] Irp__CurrentLocation ++ [L244] Irp__Tail__Overlay__CurrentStackLocation ++ [L245] CALL IofCallDriver(devExt__TopOfStack, Irp) [L481] int returnVal2 ; [L482] int compRetStatus ; [L483] int lcontext = __VERIFIER_nondet_int() ; [L484] long long __cil_tmp7 ; [L487] COND FALSE !(\read(compRegistered)) [L500] int tmp_ndt_6; [L501] tmp_ndt_6 = __VERIFIER_nondet_int() [L502] COND FALSE !(tmp_ndt_6 == 0) [L505] int tmp_ndt_7; [L506] tmp_ndt_7 = __VERIFIER_nondet_int() [L507] COND TRUE tmp_ndt_7 == 1 [L516] returnVal2 = -1073741823 [L526] COND FALSE !(s == NP) [L530] COND FALSE !(s == MPR1) [L539] COND TRUE s == SKIP1 [L540] s = SKIP2 [L541] lowerDriverReturn = returnVal2 [L549] return (returnVal2); [L245] RET IofCallDriver(devExt__TopOfStack, Irp) [L246] status = 0 [L288] return (status); [L386] RET, EXPR KbFilter_PnP(devobj, pirp) [L386] status = KbFilter_PnP(devobj, pirp) [L410] COND FALSE !(pended == 1) [L418] COND FALSE !(pended == 1) [L426] COND TRUE s != UNLOADED [L427] COND TRUE status != -1 [L428] COND FALSE !(s != SKIP2) [L438] COND FALSE !(pended == 1) [L445] COND FALSE !(s == DC) [L450] COND TRUE status != lowerDriverReturn [L451] CALL errorFn() [L1011] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 18 procedures, 240 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25.5s, OverallIterations: 21, TraceHistogramMax: 1, AutomataDifference: 19.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4633 SDtfs, 6121 SDslu, 7832 SDs, 0 SdLazy, 16037 SolverSat, 1269 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 400 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=344occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 20 MinimizatonAttempts, 275 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 1029 NumberOfCodeBlocks, 1029 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 953 ConstructedInterpolants, 0 QuantifiedInterpolants, 212124 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...