/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 false -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 0.1.25-89f541c [2020-08-27 21:50:30,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:50:30,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:50:30,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:50:30,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:50:30,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:50:30,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:50:30,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:50:30,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:50:30,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:50:30,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:50:30,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:50:30,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:50:30,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:50:30,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:50:30,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:50:30,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:50:30,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:50:30,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:50:30,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:50:30,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:50:30,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:50:30,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:50:30,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:50:30,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:50:30,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:50:30,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:50:30,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:50:30,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:50:30,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:50:30,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:50:30,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:50:30,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:50:30,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:50:30,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:50:30,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:50:30,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:50:30,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:50:30,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:50:30,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:50:30,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:50:30,415 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 [2020-08-27 21:50:30,444 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:50:30,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:50:30,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:50:30,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:50:30,450 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:50:30,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:50:30,450 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:50:30,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:50:30,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:50:30,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:50:30,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:50:30,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:50:30,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:50:30,451 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:50:30,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:50:30,452 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:50:30,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:50:30,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:50:30,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:50:30,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:50:30,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:50:30,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:50:30,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:50:30,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:50:30,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:50:30,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:50:30,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:50:30,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:50:30,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:50:30,455 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 -> false [2020-08-27 21:50:30,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:50:30,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:50:30,958 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:50:30,962 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:50:30,962 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:50:30,964 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-27 21:50:31,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de596d4da/f3d4ee70bd874db3bb02bc83cf071d57/FLAGae987b97e [2020-08-27 21:50:31,646 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:50:31,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-27 21:50:31,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de596d4da/f3d4ee70bd874db3bb02bc83cf071d57/FLAGae987b97e [2020-08-27 21:50:31,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de596d4da/f3d4ee70bd874db3bb02bc83cf071d57 [2020-08-27 21:50:31,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:50:31,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:50:31,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:31,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:50:31,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:50:31,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:31" (1/1) ... [2020-08-27 21:50:31,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe12ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:31, skipping insertion in model container [2020-08-27 21:50:31,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:31" (1/1) ... [2020-08-27 21:50:31,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:50:32,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:50:32,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:32,398 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:50:32,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:32,597 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:50:32,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:32 WrapperNode [2020-08-27 21:50:32,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:32,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:50:32,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:50:32,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:50:32,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:32" (1/1) ... [2020-08-27 21:50:32,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:32" (1/1) ... [2020-08-27 21:50:32,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:32" (1/1) ... [2020-08-27 21:50:32,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:32" (1/1) ... [2020-08-27 21:50:32,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:32" (1/1) ... [2020-08-27 21:50:32,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:32" (1/1) ... [2020-08-27 21:50:32,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:32" (1/1) ... [2020-08-27 21:50:32,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:50:32,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:50:32,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:50:32,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:50:32,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:32" (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 [2020-08-27 21:50:32,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:50:32,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:50:32,754 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2020-08-27 21:50:32,754 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2020-08-27 21:50:32,754 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_PnP [2020-08-27 21:50:32,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:50:32,755 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2020-08-27 21:50:32,755 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2020-08-27 21:50:32,755 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2020-08-27 21:50:32,755 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2020-08-27 21:50:32,755 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2020-08-27 21:50:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2020-08-27 21:50:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2020-08-27 21:50:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2020-08-27 21:50:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Power [2020-08-27 21:50:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2020-08-27 21:50:32,757 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_InternIoCtl [2020-08-27 21:50:32,757 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2020-08-27 21:50:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:50:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-27 21:50:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:50:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-27 21:50:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_PnP [2020-08-27 21:50:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2020-08-27 21:50:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2020-08-27 21:50:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2020-08-27 21:50:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2020-08-27 21:50:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2020-08-27 21:50:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2020-08-27 21:50:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Power [2020-08-27 21:50:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2020-08-27 21:50:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_InternIoCtl [2020-08-27 21:50:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2020-08-27 21:50:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2020-08-27 21:50:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2020-08-27 21:50:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2020-08-27 21:50:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:50:32,761 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2020-08-27 21:50:32,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:50:32,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:50:33,091 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-27 21:50:33,176 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2020-08-27 21:50:33,176 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2020-08-27 21:50:33,204 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-27 21:50:33,324 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2020-08-27 21:50:33,325 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2020-08-27 21:50:33,326 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-27 21:50:33,400 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-27 21:50:33,401 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-27 21:50:33,417 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-27 21:50:33,471 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-27 21:50:33,472 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-27 21:50:33,557 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-27 21:50:33,577 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2020-08-27 21:50:33,577 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2020-08-27 21:50:33,606 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-27 21:50:33,716 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume false; [2020-08-27 21:50:33,716 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume !false; [2020-08-27 21:50:33,737 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:50:33,737 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-27 21:50:33,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:33 BoogieIcfgContainer [2020-08-27 21:50:33,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:50:33,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:50:33,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:50:33,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:50:33,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:50:31" (1/3) ... [2020-08-27 21:50:33,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe85ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:33, skipping insertion in model container [2020-08-27 21:50:33,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:32" (2/3) ... [2020-08-27 21:50:33,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe85ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:33, skipping insertion in model container [2020-08-27 21:50:33,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:33" (3/3) ... [2020-08-27 21:50:33,754 INFO L109 eAbstractionObserver]: Analyzing ICFG kbfiltr_simpl2.cil-2.c [2020-08-27 21:50:33,767 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:50:33,778 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:50:33,801 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:50:33,836 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:50:33,836 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:50:33,836 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:50:33,837 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:50:33,837 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:50:33,837 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:50:33,837 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:50:33,837 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:50:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states. [2020-08-27 21:50:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-27 21:50:33,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:33,880 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] [2020-08-27 21:50:33,880 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:33,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1129426977, now seen corresponding path program 1 times [2020-08-27 21:50:33,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:33,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368253] [2020-08-27 21:50:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:34,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:34,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:34,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368253] [2020-08-27 21:50:34,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:34,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:50:34,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429418492] [2020-08-27 21:50:34,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:50:34,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:34,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:50:34,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:50:34,427 INFO L87 Difference]: Start difference. First operand 240 states. Second operand 5 states. [2020-08-27 21:50:35,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:35,662 INFO L93 Difference]: Finished difference Result 418 states and 629 transitions. [2020-08-27 21:50:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:50:35,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-27 21:50:35,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:35,684 INFO L225 Difference]: With dead ends: 418 [2020-08-27 21:50:35,685 INFO L226 Difference]: Without dead ends: 259 [2020-08-27 21:50:35,692 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 [2020-08-27 21:50:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-27 21:50:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2020-08-27 21:50:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-27 21:50:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 326 transitions. [2020-08-27 21:50:35,795 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 326 transitions. Word has length 20 [2020-08-27 21:50:35,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:35,796 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 326 transitions. [2020-08-27 21:50:35,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:50:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 326 transitions. [2020-08-27 21:50:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-27 21:50:35,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:35,798 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] [2020-08-27 21:50:35,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:50:35,799 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:35,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:35,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1811427322, now seen corresponding path program 1 times [2020-08-27 21:50:35,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:35,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147113189] [2020-08-27 21:50:35,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:36,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:36,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:36,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:36,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147113189] [2020-08-27 21:50:36,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:36,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:50:36,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930413616] [2020-08-27 21:50:36,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:50:36,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:36,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:50:36,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:50:36,148 INFO L87 Difference]: Start difference. First operand 231 states and 326 transitions. Second operand 6 states. [2020-08-27 21:50:37,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:37,475 INFO L93 Difference]: Finished difference Result 410 states and 565 transitions. [2020-08-27 21:50:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:50:37,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-27 21:50:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:37,481 INFO L225 Difference]: With dead ends: 410 [2020-08-27 21:50:37,481 INFO L226 Difference]: Without dead ends: 349 [2020-08-27 21:50:37,483 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 [2020-08-27 21:50:37,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-27 21:50:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 304. [2020-08-27 21:50:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-27 21:50:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 415 transitions. [2020-08-27 21:50:37,540 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 415 transitions. Word has length 28 [2020-08-27 21:50:37,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:37,540 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 415 transitions. [2020-08-27 21:50:37,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:50:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 415 transitions. [2020-08-27 21:50:37,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-27 21:50:37,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:37,543 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] [2020-08-27 21:50:37,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:50:37,543 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:37,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:37,544 INFO L82 PathProgramCache]: Analyzing trace with hash 439620198, now seen corresponding path program 1 times [2020-08-27 21:50:37,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:37,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86002189] [2020-08-27 21:50:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:37,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:37,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:37,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:37,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86002189] [2020-08-27 21:50:37,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:37,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:50:37,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415852304] [2020-08-27 21:50:37,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:50:37,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:37,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:50:37,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:50:37,760 INFO L87 Difference]: Start difference. First operand 304 states and 415 transitions. Second operand 6 states. [2020-08-27 21:50:38,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:38,706 INFO L93 Difference]: Finished difference Result 487 states and 647 transitions. [2020-08-27 21:50:38,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:50:38,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-27 21:50:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:38,711 INFO L225 Difference]: With dead ends: 487 [2020-08-27 21:50:38,711 INFO L226 Difference]: Without dead ends: 368 [2020-08-27 21:50:38,713 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 [2020-08-27 21:50:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-27 21:50:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2020-08-27 21:50:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-27 21:50:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 466 transitions. [2020-08-27 21:50:38,753 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 466 transitions. Word has length 28 [2020-08-27 21:50:38,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:38,753 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 466 transitions. [2020-08-27 21:50:38,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:50:38,754 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 466 transitions. [2020-08-27 21:50:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-27 21:50:38,756 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:38,757 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] [2020-08-27 21:50:38,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:50:38,757 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:38,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:38,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1607848921, now seen corresponding path program 1 times [2020-08-27 21:50:38,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:38,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384845192] [2020-08-27 21:50:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:38,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:38,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:38,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:38,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384845192] [2020-08-27 21:50:38,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:38,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:50:38,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199414467] [2020-08-27 21:50:38,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:50:38,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:38,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:50:38,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:50:38,968 INFO L87 Difference]: Start difference. First operand 344 states and 466 transitions. Second operand 6 states. [2020-08-27 21:50:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:39,825 INFO L93 Difference]: Finished difference Result 347 states and 468 transitions. [2020-08-27 21:50:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:50:39,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-27 21:50:39,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:39,828 INFO L225 Difference]: With dead ends: 347 [2020-08-27 21:50:39,828 INFO L226 Difference]: Without dead ends: 343 [2020-08-27 21:50:39,829 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 [2020-08-27 21:50:39,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-08-27 21:50:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2020-08-27 21:50:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-27 21:50:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 463 transitions. [2020-08-27 21:50:39,857 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 463 transitions. Word has length 38 [2020-08-27 21:50:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:39,858 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 463 transitions. [2020-08-27 21:50:39,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:50:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 463 transitions. [2020-08-27 21:50:39,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-27 21:50:39,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:39,861 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] [2020-08-27 21:50:39,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:50:39,862 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:39,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:39,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1742109340, now seen corresponding path program 1 times [2020-08-27 21:50:39,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:39,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128603940] [2020-08-27 21:50:39,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:39,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:40,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:40,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:40,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-27 21:50:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:40,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128603940] [2020-08-27 21:50:40,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:40,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-27 21:50:40,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594308108] [2020-08-27 21:50:40,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:50:40,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:40,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:50:40,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:50:40,069 INFO L87 Difference]: Start difference. First operand 343 states and 463 transitions. Second operand 8 states. [2020-08-27 21:50:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:41,295 INFO L93 Difference]: Finished difference Result 394 states and 520 transitions. [2020-08-27 21:50:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:50:41,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-27 21:50:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:41,298 INFO L225 Difference]: With dead ends: 394 [2020-08-27 21:50:41,298 INFO L226 Difference]: Without dead ends: 325 [2020-08-27 21:50:41,300 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 [2020-08-27 21:50:41,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-08-27 21:50:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2020-08-27 21:50:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-27 21:50:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 406 transitions. [2020-08-27 21:50:41,325 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 406 transitions. Word has length 46 [2020-08-27 21:50:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:41,325 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 406 transitions. [2020-08-27 21:50:41,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:50:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 406 transitions. [2020-08-27 21:50:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-27 21:50:41,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:41,328 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] [2020-08-27 21:50:41,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:50:41,328 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:41,329 INFO L82 PathProgramCache]: Analyzing trace with hash 750041855, now seen corresponding path program 1 times [2020-08-27 21:50:41,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:41,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659468536] [2020-08-27 21:50:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:41,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:41,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:41,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:41,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:50:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:41,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-27 21:50:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:41,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659468536] [2020-08-27 21:50:41,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:41,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-27 21:50:41,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34214565] [2020-08-27 21:50:41,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:50:41,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:41,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:50:41,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:50:41,544 INFO L87 Difference]: Start difference. First operand 304 states and 406 transitions. Second operand 8 states. [2020-08-27 21:50:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:42,036 INFO L93 Difference]: Finished difference Result 316 states and 421 transitions. [2020-08-27 21:50:42,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:50:42,037 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-27 21:50:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:42,039 INFO L225 Difference]: With dead ends: 316 [2020-08-27 21:50:42,040 INFO L226 Difference]: Without dead ends: 300 [2020-08-27 21:50:42,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:50:42,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-08-27 21:50:42,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-08-27 21:50:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-08-27 21:50:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2020-08-27 21:50:42,064 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 364 transitions. Word has length 45 [2020-08-27 21:50:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:42,065 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 364 transitions. [2020-08-27 21:50:42,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:50:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 364 transitions. [2020-08-27 21:50:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-27 21:50:42,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:42,067 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] [2020-08-27 21:50:42,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:50:42,067 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:42,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:42,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1784783245, now seen corresponding path program 1 times [2020-08-27 21:50:42,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:42,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851738304] [2020-08-27 21:50:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:42,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:42,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:42,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:42,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:50:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:42,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-27 21:50:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:42,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851738304] [2020-08-27 21:50:42,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:42,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-27 21:50:42,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144018848] [2020-08-27 21:50:42,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:50:42,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:42,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:50:42,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:50:42,340 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 8 states. [2020-08-27 21:50:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:43,433 INFO L93 Difference]: Finished difference Result 290 states and 385 transitions. [2020-08-27 21:50:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:50:43,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-27 21:50:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:43,436 INFO L225 Difference]: With dead ends: 290 [2020-08-27 21:50:43,436 INFO L226 Difference]: Without dead ends: 242 [2020-08-27 21:50:43,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:50:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-27 21:50:43,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-08-27 21:50:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-27 21:50:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 321 transitions. [2020-08-27 21:50:43,471 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 321 transitions. Word has length 46 [2020-08-27 21:50:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:43,471 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 321 transitions. [2020-08-27 21:50:43,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:50:43,472 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 321 transitions. [2020-08-27 21:50:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-27 21:50:43,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:43,477 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] [2020-08-27 21:50:43,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:50:43,477 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:43,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1852297644, now seen corresponding path program 1 times [2020-08-27 21:50:43,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:43,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451907800] [2020-08-27 21:50:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:43,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:43,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:43,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:43,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-27 21:50:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:43,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:50:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:43,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-27 21:50:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:43,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451907800] [2020-08-27 21:50:43,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:43,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-27 21:50:43,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388276476] [2020-08-27 21:50:43,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:50:43,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:43,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:50:43,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:50:43,714 INFO L87 Difference]: Start difference. First operand 242 states and 321 transitions. Second operand 8 states. [2020-08-27 21:50:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:44,422 INFO L93 Difference]: Finished difference Result 270 states and 354 transitions. [2020-08-27 21:50:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-27 21:50:44,422 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-08-27 21:50:44,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:44,428 INFO L225 Difference]: With dead ends: 270 [2020-08-27 21:50:44,428 INFO L226 Difference]: Without dead ends: 240 [2020-08-27 21:50:44,429 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 [2020-08-27 21:50:44,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-27 21:50:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-08-27 21:50:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-27 21:50:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 317 transitions. [2020-08-27 21:50:44,453 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 317 transitions. Word has length 53 [2020-08-27 21:50:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:44,453 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 317 transitions. [2020-08-27 21:50:44,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:50:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 317 transitions. [2020-08-27 21:50:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-27 21:50:44,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:44,456 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] [2020-08-27 21:50:44,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:50:44,456 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:44,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:44,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1745163498, now seen corresponding path program 1 times [2020-08-27 21:50:44,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:44,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710029537] [2020-08-27 21:50:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:44,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:44,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:44,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:44,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-27 21:50:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:44,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:50:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:44,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710029537] [2020-08-27 21:50:44,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:44,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-27 21:50:44,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633939475] [2020-08-27 21:50:44,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-27 21:50:44,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:44,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-27 21:50:44,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:50:44,708 INFO L87 Difference]: Start difference. First operand 240 states and 317 transitions. Second operand 9 states. [2020-08-27 21:50:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:46,282 INFO L93 Difference]: Finished difference Result 313 states and 400 transitions. [2020-08-27 21:50:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-27 21:50:46,283 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-08-27 21:50:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:46,286 INFO L225 Difference]: With dead ends: 313 [2020-08-27 21:50:46,286 INFO L226 Difference]: Without dead ends: 307 [2020-08-27 21:50:46,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-08-27 21:50:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-08-27 21:50:46,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 274. [2020-08-27 21:50:46,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-08-27 21:50:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 356 transitions. [2020-08-27 21:50:46,317 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 356 transitions. Word has length 51 [2020-08-27 21:50:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:46,317 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 356 transitions. [2020-08-27 21:50:46,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-27 21:50:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 356 transitions. [2020-08-27 21:50:46,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-27 21:50:46,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:46,323 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] [2020-08-27 21:50:46,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:50:46,324 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:46,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:46,324 INFO L82 PathProgramCache]: Analyzing trace with hash -855964733, now seen corresponding path program 1 times [2020-08-27 21:50:46,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:46,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710499421] [2020-08-27 21:50:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:46,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:46,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:46,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:46,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-27 21:50:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:46,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:50:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:46,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710499421] [2020-08-27 21:50:46,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:46,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-27 21:50:46,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699823100] [2020-08-27 21:50:46,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-27 21:50:46,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:46,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-27 21:50:46,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-27 21:50:46,647 INFO L87 Difference]: Start difference. First operand 274 states and 356 transitions. Second operand 13 states. [2020-08-27 21:50:46,915 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-08-27 21:50:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:49,092 INFO L93 Difference]: Finished difference Result 325 states and 410 transitions. [2020-08-27 21:50:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-27 21:50:49,093 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-08-27 21:50:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:49,096 INFO L225 Difference]: With dead ends: 325 [2020-08-27 21:50:49,096 INFO L226 Difference]: Without dead ends: 284 [2020-08-27 21:50:49,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-08-27 21:50:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-27 21:50:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2020-08-27 21:50:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-27 21:50:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 315 transitions. [2020-08-27 21:50:49,137 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 315 transitions. Word has length 52 [2020-08-27 21:50:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:49,138 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 315 transitions. [2020-08-27 21:50:49,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-27 21:50:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 315 transitions. [2020-08-27 21:50:49,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-27 21:50:49,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:49,141 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] [2020-08-27 21:50:49,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:50:49,141 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash 240184037, now seen corresponding path program 1 times [2020-08-27 21:50:49,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:49,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853429443] [2020-08-27 21:50:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:49,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:49,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:49,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:49,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-27 21:50:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:49,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:50:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:49,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853429443] [2020-08-27 21:50:49,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:49,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-27 21:50:49,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369916741] [2020-08-27 21:50:49,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-27 21:50:49,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:49,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-27 21:50:49,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:50:49,489 INFO L87 Difference]: Start difference. First operand 240 states and 315 transitions. Second operand 12 states. [2020-08-27 21:50:50,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:50,905 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2020-08-27 21:50:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-27 21:50:50,906 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-08-27 21:50:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:50,908 INFO L225 Difference]: With dead ends: 252 [2020-08-27 21:50:50,909 INFO L226 Difference]: Without dead ends: 211 [2020-08-27 21:50:50,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-27 21:50:50,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-08-27 21:50:50,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-08-27 21:50:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-27 21:50:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-27 21:50:50,928 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 53 [2020-08-27 21:50:50,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:50,929 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-27 21:50:50,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-27 21:50:50,929 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-27 21:50:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-27 21:50:50,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:50,930 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] [2020-08-27 21:50:50,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-27 21:50:50,931 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:50,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:50,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1569125, now seen corresponding path program 1 times [2020-08-27 21:50:50,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:50,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727916505] [2020-08-27 21:50:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-27 21:50:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:51,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727916505] [2020-08-27 21:50:51,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:51,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-27 21:50:51,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4290568] [2020-08-27 21:50:51,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-27 21:50:51,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:51,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-27 21:50:51,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-27 21:50:51,235 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 14 states. [2020-08-27 21:50:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,797 INFO L93 Difference]: Finished difference Result 227 states and 292 transitions. [2020-08-27 21:50:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-27 21:50:52,797 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-08-27 21:50:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:52,799 INFO L225 Difference]: With dead ends: 227 [2020-08-27 21:50:52,799 INFO L226 Difference]: Without dead ends: 206 [2020-08-27 21:50:52,800 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 [2020-08-27 21:50:52,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-27 21:50:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-27 21:50:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-27 21:50:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2020-08-27 21:50:52,826 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 54 [2020-08-27 21:50:52,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,827 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2020-08-27 21:50:52,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-27 21:50:52,827 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2020-08-27 21:50:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-27 21:50:52,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,829 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] [2020-08-27 21:50:52,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-27 21:50:52,829 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1204113239, now seen corresponding path program 1 times [2020-08-27 21:50:52,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734197938] [2020-08-27 21:50:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-27 21:50:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:50:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:50:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:53,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734197938] [2020-08-27 21:50:53,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:53,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-27 21:50:53,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438282053] [2020-08-27 21:50:53,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-27 21:50:53,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:53,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-27 21:50:53,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-27 21:50:53,123 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand 11 states. [2020-08-27 21:50:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:54,067 INFO L93 Difference]: Finished difference Result 296 states and 379 transitions. [2020-08-27 21:50:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-27 21:50:54,068 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-27 21:50:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:54,070 INFO L225 Difference]: With dead ends: 296 [2020-08-27 21:50:54,071 INFO L226 Difference]: Without dead ends: 224 [2020-08-27 21:50:54,071 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 [2020-08-27 21:50:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-08-27 21:50:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 214. [2020-08-27 21:50:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-27 21:50:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 278 transitions. [2020-08-27 21:50:54,089 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 278 transitions. Word has length 57 [2020-08-27 21:50:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:54,090 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 278 transitions. [2020-08-27 21:50:54,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-27 21:50:54,090 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 278 transitions. [2020-08-27 21:50:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-27 21:50:54,091 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:54,091 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] [2020-08-27 21:50:54,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-27 21:50:54,092 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:54,092 INFO L82 PathProgramCache]: Analyzing trace with hash -527681510, now seen corresponding path program 1 times [2020-08-27 21:50:54,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:54,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909032809] [2020-08-27 21:50:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:54,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:54,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:54,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:54,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-27 21:50:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:54,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:50:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:54,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:50:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:54,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909032809] [2020-08-27 21:50:54,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:54,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-27 21:50:54,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646755691] [2020-08-27 21:50:54,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-27 21:50:54,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:54,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-27 21:50:54,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-27 21:50:54,354 INFO L87 Difference]: Start difference. First operand 214 states and 278 transitions. Second operand 11 states. [2020-08-27 21:50:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:55,455 INFO L93 Difference]: Finished difference Result 232 states and 299 transitions. [2020-08-27 21:50:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-27 21:50:55,455 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-27 21:50:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:55,458 INFO L225 Difference]: With dead ends: 232 [2020-08-27 21:50:55,458 INFO L226 Difference]: Without dead ends: 225 [2020-08-27 21:50:55,461 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 [2020-08-27 21:50:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-08-27 21:50:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 215. [2020-08-27 21:50:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-27 21:50:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 279 transitions. [2020-08-27 21:50:55,496 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 279 transitions. Word has length 57 [2020-08-27 21:50:55,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:55,496 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 279 transitions. [2020-08-27 21:50:55,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-27 21:50:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 279 transitions. [2020-08-27 21:50:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-27 21:50:55,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:55,507 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] [2020-08-27 21:50:55,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-27 21:50:55,508 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:55,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:55,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1045578754, now seen corresponding path program 1 times [2020-08-27 21:50:55,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:55,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846702579] [2020-08-27 21:50:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:55,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:55,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:55,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:55,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:50:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:55,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-27 21:50:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:55,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:50:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:55,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846702579] [2020-08-27 21:50:55,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:55,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-27 21:50:55,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122660543] [2020-08-27 21:50:55,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:50:55,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:55,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:50:55,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:50:55,808 INFO L87 Difference]: Start difference. First operand 215 states and 279 transitions. Second operand 8 states. [2020-08-27 21:50:56,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:56,493 INFO L93 Difference]: Finished difference Result 258 states and 327 transitions. [2020-08-27 21:50:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:50:56,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-08-27 21:50:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:56,495 INFO L225 Difference]: With dead ends: 258 [2020-08-27 21:50:56,495 INFO L226 Difference]: Without dead ends: 214 [2020-08-27 21:50:56,496 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 [2020-08-27 21:50:56,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-27 21:50:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-08-27 21:50:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-27 21:50:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 274 transitions. [2020-08-27 21:50:56,513 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 274 transitions. Word has length 60 [2020-08-27 21:50:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:56,513 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 274 transitions. [2020-08-27 21:50:56,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:50:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 274 transitions. [2020-08-27 21:50:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-27 21:50:56,515 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:56,515 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] [2020-08-27 21:50:56,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-27 21:50:56,515 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:56,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:56,516 INFO L82 PathProgramCache]: Analyzing trace with hash -930292561, now seen corresponding path program 1 times [2020-08-27 21:50:56,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:56,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630591899] [2020-08-27 21:50:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:56,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:56,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:56,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:56,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:50:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:56,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:50:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:56,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:50:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:56,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630591899] [2020-08-27 21:50:56,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:56,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-27 21:50:56,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597856701] [2020-08-27 21:50:56,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-27 21:50:56,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:56,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-27 21:50:56,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-27 21:50:56,868 INFO L87 Difference]: Start difference. First operand 214 states and 274 transitions. Second operand 15 states. [2020-08-27 21:50:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,419 INFO L93 Difference]: Finished difference Result 226 states and 286 transitions. [2020-08-27 21:50:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-27 21:50:58,420 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-08-27 21:50:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,421 INFO L225 Difference]: With dead ends: 226 [2020-08-27 21:50:58,421 INFO L226 Difference]: Without dead ends: 188 [2020-08-27 21:50:58,422 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 [2020-08-27 21:50:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-27 21:50:58,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-08-27 21:50:58,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-27 21:50:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 236 transitions. [2020-08-27 21:50:58,438 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 236 transitions. Word has length 61 [2020-08-27 21:50:58,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,438 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 236 transitions. [2020-08-27 21:50:58,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-27 21:50:58,438 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 236 transitions. [2020-08-27 21:50:58,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-27 21:50:58,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,439 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] [2020-08-27 21:50:58,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-27 21:50:58,440 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1127735086, now seen corresponding path program 1 times [2020-08-27 21:50:58,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833074501] [2020-08-27 21:50:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:50:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-27 21:50:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:50:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833074501] [2020-08-27 21:50:58,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-27 21:50:58,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274059499] [2020-08-27 21:50:58,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-27 21:50:58,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-27 21:50:58,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-27 21:50:58,750 INFO L87 Difference]: Start difference. First operand 188 states and 236 transitions. Second operand 15 states. [2020-08-27 21:50:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,715 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2020-08-27 21:50:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-27 21:50:59,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-08-27 21:50:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,717 INFO L225 Difference]: With dead ends: 200 [2020-08-27 21:50:59,717 INFO L226 Difference]: Without dead ends: 186 [2020-08-27 21:50:59,718 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 [2020-08-27 21:50:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-27 21:50:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-08-27 21:50:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-27 21:50:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 232 transitions. [2020-08-27 21:50:59,733 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 232 transitions. Word has length 56 [2020-08-27 21:50:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,733 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 232 transitions. [2020-08-27 21:50:59,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-27 21:50:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 232 transitions. [2020-08-27 21:50:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-27 21:50:59,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,735 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] [2020-08-27 21:50:59,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-27 21:50:59,735 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1554463583, now seen corresponding path program 1 times [2020-08-27 21:50:59,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775300909] [2020-08-27 21:50:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:50:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-27 21:50:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-27 21:51:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:00,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775300909] [2020-08-27 21:51:00,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:00,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-27 21:51:00,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392886433] [2020-08-27 21:51:00,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-27 21:51:00,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:00,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-27 21:51:00,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-27 21:51:00,139 INFO L87 Difference]: Start difference. First operand 186 states and 232 transitions. Second operand 13 states. [2020-08-27 21:51:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:01,387 INFO L93 Difference]: Finished difference Result 237 states and 286 transitions. [2020-08-27 21:51:01,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-27 21:51:01,388 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-08-27 21:51:01,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:01,390 INFO L225 Difference]: With dead ends: 237 [2020-08-27 21:51:01,390 INFO L226 Difference]: Without dead ends: 220 [2020-08-27 21:51:01,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-08-27 21:51:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-27 21:51:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2020-08-27 21:51:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-27 21:51:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 237 transitions. [2020-08-27 21:51:01,414 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 237 transitions. Word has length 55 [2020-08-27 21:51:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:01,415 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 237 transitions. [2020-08-27 21:51:01,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-27 21:51:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 237 transitions. [2020-08-27 21:51:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-27 21:51:01,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:01,416 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] [2020-08-27 21:51:01,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-27 21:51:01,416 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash -725184292, now seen corresponding path program 1 times [2020-08-27 21:51:01,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:01,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271573000] [2020-08-27 21:51:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:01,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:01,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:51:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:01,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:51:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:01,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-27 21:51:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:01,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-27 21:51:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:01,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271573000] [2020-08-27 21:51:01,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:01,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-27 21:51:01,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118198338] [2020-08-27 21:51:01,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-27 21:51:01,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:01,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-27 21:51:01,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-27 21:51:01,742 INFO L87 Difference]: Start difference. First operand 190 states and 237 transitions. Second operand 14 states. [2020-08-27 21:51:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:02,756 INFO L93 Difference]: Finished difference Result 206 states and 253 transitions. [2020-08-27 21:51:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-27 21:51:02,757 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-08-27 21:51:02,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:02,758 INFO L225 Difference]: With dead ends: 206 [2020-08-27 21:51:02,758 INFO L226 Difference]: Without dead ends: 168 [2020-08-27 21:51:02,759 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 [2020-08-27 21:51:02,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-27 21:51:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-08-27 21:51:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-27 21:51:02,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2020-08-27 21:51:02,773 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 55 [2020-08-27 21:51:02,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:02,774 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2020-08-27 21:51:02,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-27 21:51:02,774 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2020-08-27 21:51:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-27 21:51:02,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:02,775 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] [2020-08-27 21:51:02,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-27 21:51:02,775 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:02,776 INFO L82 PathProgramCache]: Analyzing trace with hash -639520605, now seen corresponding path program 1 times [2020-08-27 21:51:02,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:02,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174482290] [2020-08-27 21:51:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:51:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:51:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-27 21:51:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:03,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:03,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:03,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174482290] [2020-08-27 21:51:03,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:03,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-27 21:51:03,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745651088] [2020-08-27 21:51:03,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:51:03,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:03,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:51:03,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:51:03,055 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand 10 states. [2020-08-27 21:51:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:03,454 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2020-08-27 21:51:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:51:03,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-08-27 21:51:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:03,457 INFO L225 Difference]: With dead ends: 204 [2020-08-27 21:51:03,457 INFO L226 Difference]: Without dead ends: 162 [2020-08-27 21:51:03,458 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 [2020-08-27 21:51:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-27 21:51:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-08-27 21:51:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-27 21:51:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2020-08-27 21:51:03,472 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 58 [2020-08-27 21:51:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:03,472 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2020-08-27 21:51:03,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:51:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2020-08-27 21:51:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-27 21:51:03,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:03,473 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] [2020-08-27 21:51:03,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-27 21:51:03,474 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:03,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:03,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1656625880, now seen corresponding path program 1 times [2020-08-27 21:51:03,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:03,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471818055] [2020-08-27 21:51:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-27 21:51:03,512 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-27 21:51:03,512 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 21:51:03,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-27 21:51:03,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:51:03 BoogieIcfgContainer [2020-08-27 21:51:03,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:51:03,559 INFO L168 Benchmark]: Toolchain (without parser) took 31606.38 ms. Allocated memory was 138.9 MB in the beginning and 543.7 MB in the end (delta: 404.8 MB). Free memory was 101.7 MB in the beginning and 359.5 MB in the end (delta: -257.8 MB). Peak memory consumption was 147.0 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:03,560 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-27 21:51:03,560 INFO L168 Benchmark]: CACSL2BoogieTranslator took 644.09 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 101.5 MB in the beginning and 174.9 MB in the end (delta: -73.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:03,561 INFO L168 Benchmark]: Boogie Preprocessor took 77.33 ms. Allocated memory is still 202.4 MB. Free memory was 174.9 MB in the beginning and 172.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:03,561 INFO L168 Benchmark]: RCFGBuilder took 1068.23 ms. Allocated memory is still 202.4 MB. Free memory was 172.1 MB in the beginning and 100.8 MB in the end (delta: 71.4 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:03,562 INFO L168 Benchmark]: TraceAbstraction took 29811.12 ms. Allocated memory was 202.4 MB in the beginning and 543.7 MB in the end (delta: 341.3 MB). Free memory was 100.1 MB in the beginning and 359.5 MB in the end (delta: -259.4 MB). Peak memory consumption was 81.9 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:03,565 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 644.09 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 101.5 MB in the beginning and 174.9 MB in the end (delta: -73.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 77.33 ms. Allocated memory is still 202.4 MB. Free memory was 174.9 MB in the beginning and 172.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1068.23 ms. Allocated memory is still 202.4 MB. Free memory was 172.1 MB in the beginning and 100.8 MB in the end (delta: 71.4 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29811.12 ms. Allocated memory was 202.4 MB in the beginning and 543.7 MB in the end (delta: 341.3 MB). Free memory was 100.1 MB in the beginning and 359.5 MB in the end (delta: -259.4 MB). Peak memory consumption was 81.9 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: 29.6s, OverallIterations: 21, TraceHistogramMax: 1, AutomataDifference: 22.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4632 SDtfs, 6122 SDslu, 7825 SDs, 0 SdLazy, 16029 SolverSat, 1270 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 400 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 5.4s 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, 0.7s SatisfiabilityAnalysisTime, 4.8s 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...