/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:20:34,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:20:34,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:20:34,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:20:34,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:20:34,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:20:34,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:20:34,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:20:34,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:20:34,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:20:34,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:20:34,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:20:34,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:20:34,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:20:34,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:20:34,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:20:34,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:20:34,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:20:34,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:20:34,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:20:34,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:20:34,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:20:34,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:20:34,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:20:34,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:20:34,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:20:34,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:20:34,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:20:34,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:20:34,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:20:34,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:20:34,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:20:34,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:20:34,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:20:34,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:20:34,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:20:34,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:20:34,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:20:34,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:20:34,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:20:34,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:20:34,329 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 17:20:34,371 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:20:34,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:20:34,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:20:34,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:20:34,374 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:20:34,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:20:34,375 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:20:34,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:20:34,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:20:34,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:20:34,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:20:34,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:20:34,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:20:34,378 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:20:34,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:20:34,378 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:20:34,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:20:34,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:20:34,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:20:34,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:20:34,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:20:34,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:20:34,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:20:34,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:20:34,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:20:34,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:20:34,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:20:34,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:20:34,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:20:34,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:20:34,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:20:34,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:20:34,708 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:20:34,710 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:20:34,711 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:20:34,712 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-21 17:20:34,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca76f28fd/af6d3fd0390c47558b4ec1a52ee57d07/FLAG309e5c91a [2020-08-21 17:20:35,368 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:20:35,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-21 17:20:35,387 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca76f28fd/af6d3fd0390c47558b4ec1a52ee57d07/FLAG309e5c91a [2020-08-21 17:20:35,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca76f28fd/af6d3fd0390c47558b4ec1a52ee57d07 [2020-08-21 17:20:35,650 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:20:35,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:20:35,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:20:35,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:20:35,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:20:35,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:35" (1/1) ... [2020-08-21 17:20:35,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19617743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:35, skipping insertion in model container [2020-08-21 17:20:35,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:35" (1/1) ... [2020-08-21 17:20:35,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:20:35,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:20:36,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:20:36,018 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:20:36,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:20:36,218 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:20:36,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:36 WrapperNode [2020-08-21 17:20:36,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:20:36,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:20:36,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:20:36,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:20:36,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:36" (1/1) ... [2020-08-21 17:20:36,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:36" (1/1) ... [2020-08-21 17:20:36,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:36" (1/1) ... [2020-08-21 17:20:36,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:36" (1/1) ... [2020-08-21 17:20:36,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:36" (1/1) ... [2020-08-21 17:20:36,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:36" (1/1) ... [2020-08-21 17:20:36,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:36" (1/1) ... [2020-08-21 17:20:36,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:20:36,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:20:36,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:20:36,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:20:36,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:20:36,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:20:36,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:20:36,355 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2020-08-21 17:20:36,356 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2020-08-21 17:20:36,356 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_PnP [2020-08-21 17:20:36,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:20:36,356 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2020-08-21 17:20:36,356 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2020-08-21 17:20:36,357 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2020-08-21 17:20:36,357 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2020-08-21 17:20:36,357 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2020-08-21 17:20:36,357 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2020-08-21 17:20:36,357 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2020-08-21 17:20:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2020-08-21 17:20:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Power [2020-08-21 17:20:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2020-08-21 17:20:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_InternIoCtl [2020-08-21 17:20:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2020-08-21 17:20:36,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:20:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 17:20:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:20:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 17:20:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_PnP [2020-08-21 17:20:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2020-08-21 17:20:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2020-08-21 17:20:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2020-08-21 17:20:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2020-08-21 17:20:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2020-08-21 17:20:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2020-08-21 17:20:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Power [2020-08-21 17:20:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2020-08-21 17:20:36,361 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_InternIoCtl [2020-08-21 17:20:36,361 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2020-08-21 17:20:36,361 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2020-08-21 17:20:36,361 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2020-08-21 17:20:36,361 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2020-08-21 17:20:36,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:20:36,361 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2020-08-21 17:20:36,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:20:36,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:20:36,601 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 17:20:36,669 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2020-08-21 17:20:36,670 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2020-08-21 17:20:36,701 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 17:20:36,843 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2020-08-21 17:20:36,843 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2020-08-21 17:20:36,846 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 17:20:36,894 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-21 17:20:36,894 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-21 17:20:36,915 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 17:20:36,963 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-21 17:20:36,963 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-21 17:20:37,067 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 17:20:37,090 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2020-08-21 17:20:37,091 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2020-08-21 17:20:37,114 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 17:20:37,208 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume false; [2020-08-21 17:20:37,209 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume !false; [2020-08-21 17:20:37,227 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:20:37,228 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 17:20:37,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:20:37 BoogieIcfgContainer [2020-08-21 17:20:37,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:20:37,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:20:37,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:20:37,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:20:37,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:20:35" (1/3) ... [2020-08-21 17:20:37,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e11d5a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:20:37, skipping insertion in model container [2020-08-21 17:20:37,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:36" (2/3) ... [2020-08-21 17:20:37,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e11d5a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:20:37, skipping insertion in model container [2020-08-21 17:20:37,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:20:37" (3/3) ... [2020-08-21 17:20:37,243 INFO L109 eAbstractionObserver]: Analyzing ICFG kbfiltr_simpl2.cil-2.c [2020-08-21 17:20:37,254 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:20:37,263 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:20:37,278 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:20:37,302 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:20:37,303 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:20:37,303 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:20:37,303 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:20:37,303 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:20:37,303 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:20:37,304 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:20:37,304 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:20:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states. [2020-08-21 17:20:37,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 17:20:37,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:37,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:37,336 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:37,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:37,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1129426977, now seen corresponding path program 1 times [2020-08-21 17:20:37,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:37,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448932393] [2020-08-21 17:20:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:37,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:37,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:37,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448932393] [2020-08-21 17:20:37,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:37,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:20:37,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472092214] [2020-08-21 17:20:37,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:20:37,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:37,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:20:37,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:20:37,836 INFO L87 Difference]: Start difference. First operand 240 states. Second operand 5 states. [2020-08-21 17:20:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:38,974 INFO L93 Difference]: Finished difference Result 418 states and 629 transitions. [2020-08-21 17:20:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:20:38,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 17:20:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:38,997 INFO L225 Difference]: With dead ends: 418 [2020-08-21 17:20:38,997 INFO L226 Difference]: Without dead ends: 259 [2020-08-21 17:20:39,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:20:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-21 17:20:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2020-08-21 17:20:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-21 17:20:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 326 transitions. [2020-08-21 17:20:39,083 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 326 transitions. Word has length 20 [2020-08-21 17:20:39,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:39,083 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 326 transitions. [2020-08-21 17:20:39,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:20:39,084 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 326 transitions. [2020-08-21 17:20:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 17:20:39,085 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:39,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:39,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:20:39,086 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:39,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:39,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1811427322, now seen corresponding path program 1 times [2020-08-21 17:20:39,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:39,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496054460] [2020-08-21 17:20:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:39,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:39,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:39,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:39,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496054460] [2020-08-21 17:20:39,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:39,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:20:39,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682367595] [2020-08-21 17:20:39,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:20:39,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:39,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:20:39,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:20:39,366 INFO L87 Difference]: Start difference. First operand 231 states and 326 transitions. Second operand 6 states. [2020-08-21 17:20:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:40,703 INFO L93 Difference]: Finished difference Result 410 states and 565 transitions. [2020-08-21 17:20:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:20:40,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 17:20:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:40,712 INFO L225 Difference]: With dead ends: 410 [2020-08-21 17:20:40,712 INFO L226 Difference]: Without dead ends: 349 [2020-08-21 17:20:40,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:20:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-21 17:20:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 304. [2020-08-21 17:20:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 17:20:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 415 transitions. [2020-08-21 17:20:40,759 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 415 transitions. Word has length 28 [2020-08-21 17:20:40,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:40,760 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 415 transitions. [2020-08-21 17:20:40,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:20:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 415 transitions. [2020-08-21 17:20:40,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 17:20:40,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:40,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:40,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:20:40,763 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:40,763 INFO L82 PathProgramCache]: Analyzing trace with hash 439620198, now seen corresponding path program 1 times [2020-08-21 17:20:40,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:40,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736794075] [2020-08-21 17:20:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:40,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:40,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:40,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:40,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736794075] [2020-08-21 17:20:40,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:40,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:20:40,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355291233] [2020-08-21 17:20:40,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:20:40,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:40,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:20:40,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:20:40,968 INFO L87 Difference]: Start difference. First operand 304 states and 415 transitions. Second operand 6 states. [2020-08-21 17:20:41,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:41,750 INFO L93 Difference]: Finished difference Result 487 states and 647 transitions. [2020-08-21 17:20:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:20:41,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 17:20:41,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:41,754 INFO L225 Difference]: With dead ends: 487 [2020-08-21 17:20:41,754 INFO L226 Difference]: Without dead ends: 368 [2020-08-21 17:20:41,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:20:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-21 17:20:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2020-08-21 17:20:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-21 17:20:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 466 transitions. [2020-08-21 17:20:41,828 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 466 transitions. Word has length 28 [2020-08-21 17:20:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:41,829 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 466 transitions. [2020-08-21 17:20:41,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:20:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 466 transitions. [2020-08-21 17:20:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 17:20:41,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:41,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:41,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:20:41,842 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:41,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:41,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1607848921, now seen corresponding path program 1 times [2020-08-21 17:20:41,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:41,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184583652] [2020-08-21 17:20:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:41,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:42,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:42,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:42,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184583652] [2020-08-21 17:20:42,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:42,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:20:42,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041611975] [2020-08-21 17:20:42,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:20:42,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:42,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:20:42,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:20:42,066 INFO L87 Difference]: Start difference. First operand 344 states and 466 transitions. Second operand 6 states. [2020-08-21 17:20:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:42,930 INFO L93 Difference]: Finished difference Result 347 states and 468 transitions. [2020-08-21 17:20:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:20:42,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-21 17:20:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:42,934 INFO L225 Difference]: With dead ends: 347 [2020-08-21 17:20:42,934 INFO L226 Difference]: Without dead ends: 343 [2020-08-21 17:20:42,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:20:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-08-21 17:20:42,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2020-08-21 17:20:42,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-21 17:20:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 463 transitions. [2020-08-21 17:20:42,978 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 463 transitions. Word has length 38 [2020-08-21 17:20:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:42,978 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 463 transitions. [2020-08-21 17:20:42,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:20:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 463 transitions. [2020-08-21 17:20:42,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 17:20:42,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:42,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:42,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:20:42,984 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:42,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1742109340, now seen corresponding path program 1 times [2020-08-21 17:20:42,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:42,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115747648] [2020-08-21 17:20:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:43,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:43,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:43,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:43,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 17:20:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:43,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115747648] [2020-08-21 17:20:43,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:43,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:20:43,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627104845] [2020-08-21 17:20:43,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:20:43,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:43,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:20:43,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:20:43,170 INFO L87 Difference]: Start difference. First operand 343 states and 463 transitions. Second operand 8 states. [2020-08-21 17:20:44,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:44,325 INFO L93 Difference]: Finished difference Result 394 states and 520 transitions. [2020-08-21 17:20:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:20:44,325 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-21 17:20:44,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:44,329 INFO L225 Difference]: With dead ends: 394 [2020-08-21 17:20:44,329 INFO L226 Difference]: Without dead ends: 325 [2020-08-21 17:20:44,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:20:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-08-21 17:20:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2020-08-21 17:20:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 17:20:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 406 transitions. [2020-08-21 17:20:44,353 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 406 transitions. Word has length 46 [2020-08-21 17:20:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:44,354 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 406 transitions. [2020-08-21 17:20:44,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:20:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 406 transitions. [2020-08-21 17:20:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 17:20:44,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:44,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:44,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:20:44,356 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:44,357 INFO L82 PathProgramCache]: Analyzing trace with hash 750041855, now seen corresponding path program 1 times [2020-08-21 17:20:44,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:44,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597170563] [2020-08-21 17:20:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:44,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:44,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:44,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:44,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:20:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:44,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 17:20:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:44,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597170563] [2020-08-21 17:20:44,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:44,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:20:44,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834484347] [2020-08-21 17:20:44,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:20:44,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:44,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:20:44,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:20:44,564 INFO L87 Difference]: Start difference. First operand 304 states and 406 transitions. Second operand 8 states. [2020-08-21 17:20:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:45,080 INFO L93 Difference]: Finished difference Result 316 states and 421 transitions. [2020-08-21 17:20:45,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 17:20:45,081 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-21 17:20:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:45,084 INFO L225 Difference]: With dead ends: 316 [2020-08-21 17:20:45,084 INFO L226 Difference]: Without dead ends: 300 [2020-08-21 17:20:45,085 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 [2020-08-21 17:20:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-08-21 17:20:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-08-21 17:20:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-08-21 17:20:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2020-08-21 17:20:45,114 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 364 transitions. Word has length 45 [2020-08-21 17:20:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:45,115 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 364 transitions. [2020-08-21 17:20:45,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:20:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 364 transitions. [2020-08-21 17:20:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 17:20:45,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:45,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:45,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:20:45,118 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:45,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:45,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1784783245, now seen corresponding path program 1 times [2020-08-21 17:20:45,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:45,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214077414] [2020-08-21 17:20:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:45,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:45,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:45,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:45,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:20:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:45,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 17:20:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:45,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214077414] [2020-08-21 17:20:45,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:45,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:20:45,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707187391] [2020-08-21 17:20:45,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:20:45,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:45,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:20:45,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:20:45,352 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 8 states. [2020-08-21 17:20:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:46,297 INFO L93 Difference]: Finished difference Result 290 states and 385 transitions. [2020-08-21 17:20:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 17:20:46,298 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-21 17:20:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:46,301 INFO L225 Difference]: With dead ends: 290 [2020-08-21 17:20:46,301 INFO L226 Difference]: Without dead ends: 242 [2020-08-21 17:20:46,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:20:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-21 17:20:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-08-21 17:20:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-21 17:20:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 321 transitions. [2020-08-21 17:20:46,320 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 321 transitions. Word has length 46 [2020-08-21 17:20:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:46,320 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 321 transitions. [2020-08-21 17:20:46,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:20:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 321 transitions. [2020-08-21 17:20:46,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 17:20:46,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:46,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:46,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:20:46,323 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:46,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1852297644, now seen corresponding path program 1 times [2020-08-21 17:20:46,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:46,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497557635] [2020-08-21 17:20:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:46,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:46,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:46,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:46,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:20:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:46,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:20:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:46,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 17:20:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:46,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497557635] [2020-08-21 17:20:46,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:46,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:20:46,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429685113] [2020-08-21 17:20:46,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:20:46,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:46,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:20:46,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:20:46,485 INFO L87 Difference]: Start difference. First operand 242 states and 321 transitions. Second operand 8 states. [2020-08-21 17:20:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:47,120 INFO L93 Difference]: Finished difference Result 270 states and 354 transitions. [2020-08-21 17:20:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:20:47,121 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-08-21 17:20:47,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:47,125 INFO L225 Difference]: With dead ends: 270 [2020-08-21 17:20:47,125 INFO L226 Difference]: Without dead ends: 240 [2020-08-21 17:20:47,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:20:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-21 17:20:47,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-08-21 17:20:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-21 17:20:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 317 transitions. [2020-08-21 17:20:47,146 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 317 transitions. Word has length 53 [2020-08-21 17:20:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:47,147 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 317 transitions. [2020-08-21 17:20:47,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:20:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 317 transitions. [2020-08-21 17:20:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 17:20:47,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:47,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:47,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:20:47,149 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:47,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1745163498, now seen corresponding path program 1 times [2020-08-21 17:20:47,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:47,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278403475] [2020-08-21 17:20:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:47,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:47,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:47,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:47,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 17:20:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:47,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:47,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278403475] [2020-08-21 17:20:47,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:47,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:20:47,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091538356] [2020-08-21 17:20:47,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:20:47,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:47,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:20:47,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:20:47,362 INFO L87 Difference]: Start difference. First operand 240 states and 317 transitions. Second operand 9 states. [2020-08-21 17:20:48,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,738 INFO L93 Difference]: Finished difference Result 313 states and 400 transitions. [2020-08-21 17:20:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:20:48,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-08-21 17:20:48,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,742 INFO L225 Difference]: With dead ends: 313 [2020-08-21 17:20:48,742 INFO L226 Difference]: Without dead ends: 307 [2020-08-21 17:20:48,743 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 [2020-08-21 17:20:48,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-08-21 17:20:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 274. [2020-08-21 17:20:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-08-21 17:20:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 356 transitions. [2020-08-21 17:20:48,764 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 356 transitions. Word has length 51 [2020-08-21 17:20:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:48,764 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 356 transitions. [2020-08-21 17:20:48,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:20:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 356 transitions. [2020-08-21 17:20:48,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 17:20:48,766 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:48,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:48,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:20:48,767 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:48,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:48,767 INFO L82 PathProgramCache]: Analyzing trace with hash -855964733, now seen corresponding path program 1 times [2020-08-21 17:20:48,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:48,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180508385] [2020-08-21 17:20:48,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 17:20:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:49,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180508385] [2020-08-21 17:20:49,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 17:20:49,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487710782] [2020-08-21 17:20:49,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:20:49,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:20:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:20:49,033 INFO L87 Difference]: Start difference. First operand 274 states and 356 transitions. Second operand 13 states. [2020-08-21 17:20:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:51,170 INFO L93 Difference]: Finished difference Result 325 states and 410 transitions. [2020-08-21 17:20:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 17:20:51,170 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-08-21 17:20:51,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:51,173 INFO L225 Difference]: With dead ends: 325 [2020-08-21 17:20:51,173 INFO L226 Difference]: Without dead ends: 284 [2020-08-21 17:20:51,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-08-21 17:20:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-21 17:20:51,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2020-08-21 17:20:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-21 17:20:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 315 transitions. [2020-08-21 17:20:51,205 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 315 transitions. Word has length 52 [2020-08-21 17:20:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:51,205 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 315 transitions. [2020-08-21 17:20:51,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:20:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 315 transitions. [2020-08-21 17:20:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 17:20:51,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:51,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:51,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:20:51,209 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:51,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:51,209 INFO L82 PathProgramCache]: Analyzing trace with hash 240184037, now seen corresponding path program 1 times [2020-08-21 17:20:51,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:51,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979537565] [2020-08-21 17:20:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 17:20:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:51,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979537565] [2020-08-21 17:20:51,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:51,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 17:20:51,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801811653] [2020-08-21 17:20:51,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:20:51,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:51,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:20:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:20:51,519 INFO L87 Difference]: Start difference. First operand 240 states and 315 transitions. Second operand 12 states. [2020-08-21 17:20:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:52,817 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2020-08-21 17:20:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:20:52,818 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-08-21 17:20:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:52,820 INFO L225 Difference]: With dead ends: 252 [2020-08-21 17:20:52,820 INFO L226 Difference]: Without dead ends: 211 [2020-08-21 17:20:52,821 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 [2020-08-21 17:20:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-08-21 17:20:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-08-21 17:20:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-21 17:20:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-21 17:20:52,840 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 53 [2020-08-21 17:20:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:52,841 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-21 17:20:52,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:20:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-21 17:20:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 17:20:52,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:52,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:52,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:20:52,843 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:52,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1569125, now seen corresponding path program 1 times [2020-08-21 17:20:52,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:52,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242704272] [2020-08-21 17:20:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:52,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:52,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 17:20:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:53,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242704272] [2020-08-21 17:20:53,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 17:20:53,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419338677] [2020-08-21 17:20:53,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 17:20:53,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 17:20:53,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:20:53,119 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 14 states. [2020-08-21 17:20:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:54,327 INFO L93 Difference]: Finished difference Result 227 states and 292 transitions. [2020-08-21 17:20:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 17:20:54,329 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-08-21 17:20:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:54,331 INFO L225 Difference]: With dead ends: 227 [2020-08-21 17:20:54,331 INFO L226 Difference]: Without dead ends: 206 [2020-08-21 17:20:54,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-08-21 17:20:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-21 17:20:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-21 17:20:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 17:20:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2020-08-21 17:20:54,351 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 54 [2020-08-21 17:20:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:54,352 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2020-08-21 17:20:54,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 17:20:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2020-08-21 17:20:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:20:54,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:54,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:54,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:20:54,354 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:54,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:54,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1204113239, now seen corresponding path program 1 times [2020-08-21 17:20:54,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:54,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133224461] [2020-08-21 17:20:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 17:20:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:20:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:54,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133224461] [2020-08-21 17:20:54,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:54,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 17:20:54,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750339287] [2020-08-21 17:20:54,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 17:20:54,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:54,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 17:20:54,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:20:54,586 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand 11 states. [2020-08-21 17:20:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:55,467 INFO L93 Difference]: Finished difference Result 296 states and 379 transitions. [2020-08-21 17:20:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 17:20:55,467 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-21 17:20:55,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:55,470 INFO L225 Difference]: With dead ends: 296 [2020-08-21 17:20:55,470 INFO L226 Difference]: Without dead ends: 224 [2020-08-21 17:20:55,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:20:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-08-21 17:20:55,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 214. [2020-08-21 17:20:55,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-21 17:20:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 278 transitions. [2020-08-21 17:20:55,488 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 278 transitions. Word has length 57 [2020-08-21 17:20:55,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:55,488 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 278 transitions. [2020-08-21 17:20:55,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 17:20:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 278 transitions. [2020-08-21 17:20:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:20:55,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:55,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:55,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 17:20:55,490 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:55,491 INFO L82 PathProgramCache]: Analyzing trace with hash -527681510, now seen corresponding path program 1 times [2020-08-21 17:20:55,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:55,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781420806] [2020-08-21 17:20:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:55,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:55,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:55,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:55,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 17:20:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:55,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:55,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:20:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:55,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781420806] [2020-08-21 17:20:55,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:55,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 17:20:55,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399933981] [2020-08-21 17:20:55,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 17:20:55,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:55,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 17:20:55,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:20:55,697 INFO L87 Difference]: Start difference. First operand 214 states and 278 transitions. Second operand 11 states. [2020-08-21 17:20:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:56,603 INFO L93 Difference]: Finished difference Result 232 states and 299 transitions. [2020-08-21 17:20:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:20:56,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-21 17:20:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:56,606 INFO L225 Difference]: With dead ends: 232 [2020-08-21 17:20:56,606 INFO L226 Difference]: Without dead ends: 225 [2020-08-21 17:20:56,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-08-21 17:20:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-08-21 17:20:56,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 215. [2020-08-21 17:20:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-21 17:20:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 279 transitions. [2020-08-21 17:20:56,626 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 279 transitions. Word has length 57 [2020-08-21 17:20:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:56,626 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 279 transitions. [2020-08-21 17:20:56,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 17:20:56,626 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 279 transitions. [2020-08-21 17:20:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 17:20:56,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:56,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:56,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 17:20:56,628 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:56,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1045578754, now seen corresponding path program 1 times [2020-08-21 17:20:56,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:56,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472372144] [2020-08-21 17:20:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:20:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 17:20:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:20:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:56,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472372144] [2020-08-21 17:20:56,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:56,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:20:56,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320861913] [2020-08-21 17:20:56,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:20:56,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:56,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:20:56,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:20:56,824 INFO L87 Difference]: Start difference. First operand 215 states and 279 transitions. Second operand 8 states. [2020-08-21 17:20:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:57,459 INFO L93 Difference]: Finished difference Result 258 states and 327 transitions. [2020-08-21 17:20:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:20:57,460 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-08-21 17:20:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:57,462 INFO L225 Difference]: With dead ends: 258 [2020-08-21 17:20:57,462 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 17:20:57,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:20:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 17:20:57,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-08-21 17:20:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-21 17:20:57,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 274 transitions. [2020-08-21 17:20:57,480 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 274 transitions. Word has length 60 [2020-08-21 17:20:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:57,480 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 274 transitions. [2020-08-21 17:20:57,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:20:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 274 transitions. [2020-08-21 17:20:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 17:20:57,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:57,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:57,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 17:20:57,482 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:57,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:57,483 INFO L82 PathProgramCache]: Analyzing trace with hash -930292561, now seen corresponding path program 1 times [2020-08-21 17:20:57,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:57,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637160772] [2020-08-21 17:20:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:20:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:20:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:57,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637160772] [2020-08-21 17:20:57,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:57,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-21 17:20:57,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80465354] [2020-08-21 17:20:57,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 17:20:57,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:57,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 17:20:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:20:57,818 INFO L87 Difference]: Start difference. First operand 214 states and 274 transitions. Second operand 15 states. [2020-08-21 17:20:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:59,237 INFO L93 Difference]: Finished difference Result 226 states and 286 transitions. [2020-08-21 17:20:59,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 17:20:59,238 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-08-21 17:20:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:59,240 INFO L225 Difference]: With dead ends: 226 [2020-08-21 17:20:59,240 INFO L226 Difference]: Without dead ends: 188 [2020-08-21 17:20:59,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-21 17:20:59,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-21 17:20:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-08-21 17:20:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 17:20:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 236 transitions. [2020-08-21 17:20:59,262 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 236 transitions. Word has length 61 [2020-08-21 17:20:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:59,262 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 236 transitions. [2020-08-21 17:20:59,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 17:20:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 236 transitions. [2020-08-21 17:20:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 17:20:59,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:59,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:59,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 17:20:59,264 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:59,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1127735086, now seen corresponding path program 1 times [2020-08-21 17:20:59,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:59,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122216117] [2020-08-21 17:20:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:59,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:59,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:20:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:59,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:20:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:59,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:20:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:59,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 17:20:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:59,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:20:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:59,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122216117] [2020-08-21 17:20:59,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:59,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-21 17:20:59,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115463701] [2020-08-21 17:20:59,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 17:20:59,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:59,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 17:20:59,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:20:59,588 INFO L87 Difference]: Start difference. First operand 188 states and 236 transitions. Second operand 15 states. [2020-08-21 17:21:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:00,497 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2020-08-21 17:21:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 17:21:00,498 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-08-21 17:21:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:00,499 INFO L225 Difference]: With dead ends: 200 [2020-08-21 17:21:00,500 INFO L226 Difference]: Without dead ends: 186 [2020-08-21 17:21:00,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-21 17:21:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-21 17:21:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-08-21 17:21:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-21 17:21:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 232 transitions. [2020-08-21 17:21:00,518 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 232 transitions. Word has length 56 [2020-08-21 17:21:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:00,519 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 232 transitions. [2020-08-21 17:21:00,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 17:21:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 232 transitions. [2020-08-21 17:21:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 17:21:00,520 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:00,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:00,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 17:21:00,521 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:00,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1554463583, now seen corresponding path program 1 times [2020-08-21 17:21:00,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:00,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584371537] [2020-08-21 17:21:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:00,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:00,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:21:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:00,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:21:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:00,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 17:21:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:00,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 17:21:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:00,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584371537] [2020-08-21 17:21:00,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:21:00,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 17:21:00,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110434651] [2020-08-21 17:21:00,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:21:00,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:00,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:21:00,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:21:00,780 INFO L87 Difference]: Start difference. First operand 186 states and 232 transitions. Second operand 13 states. [2020-08-21 17:21:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:01,941 INFO L93 Difference]: Finished difference Result 237 states and 286 transitions. [2020-08-21 17:21:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 17:21:01,941 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-08-21 17:21:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:01,943 INFO L225 Difference]: With dead ends: 237 [2020-08-21 17:21:01,943 INFO L226 Difference]: Without dead ends: 220 [2020-08-21 17:21:01,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-08-21 17:21:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-21 17:21:01,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2020-08-21 17:21:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-21 17:21:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 237 transitions. [2020-08-21 17:21:01,963 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 237 transitions. Word has length 55 [2020-08-21 17:21:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:01,964 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 237 transitions. [2020-08-21 17:21:01,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:21:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 237 transitions. [2020-08-21 17:21:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 17:21:01,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:01,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:01,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 17:21:01,966 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:01,966 INFO L82 PathProgramCache]: Analyzing trace with hash -725184292, now seen corresponding path program 1 times [2020-08-21 17:21:01,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:01,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144016836] [2020-08-21 17:21:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:02,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:02,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:21:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:02,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:21:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:02,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 17:21:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:02,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 17:21:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:02,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144016836] [2020-08-21 17:21:02,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:21:02,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 17:21:02,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524801722] [2020-08-21 17:21:02,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 17:21:02,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:02,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 17:21:02,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:21:02,251 INFO L87 Difference]: Start difference. First operand 190 states and 237 transitions. Second operand 14 states. [2020-08-21 17:21:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:03,133 INFO L93 Difference]: Finished difference Result 206 states and 253 transitions. [2020-08-21 17:21:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 17:21:03,133 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-08-21 17:21:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:03,135 INFO L225 Difference]: With dead ends: 206 [2020-08-21 17:21:03,135 INFO L226 Difference]: Without dead ends: 168 [2020-08-21 17:21:03,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-08-21 17:21:03,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-21 17:21:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-08-21 17:21:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 17:21:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2020-08-21 17:21:03,150 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 55 [2020-08-21 17:21:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:03,150 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2020-08-21 17:21:03,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 17:21:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2020-08-21 17:21:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 17:21:03,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:03,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:03,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 17:21:03,152 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:03,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:03,152 INFO L82 PathProgramCache]: Analyzing trace with hash -639520605, now seen corresponding path program 1 times [2020-08-21 17:21:03,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:03,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133934194] [2020-08-21 17:21:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:03,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:03,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:21:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:03,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:21:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:03,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 17:21:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:03,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:21:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:03,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:03,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133934194] [2020-08-21 17:21:03,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:21:03,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 17:21:03,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005358439] [2020-08-21 17:21:03,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:21:03,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:03,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:21:03,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:21:03,369 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand 10 states. [2020-08-21 17:21:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:03,720 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2020-08-21 17:21:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:21:03,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-08-21 17:21:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:03,722 INFO L225 Difference]: With dead ends: 204 [2020-08-21 17:21:03,722 INFO L226 Difference]: Without dead ends: 162 [2020-08-21 17:21:03,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:21:03,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-21 17:21:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-08-21 17:21:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-21 17:21:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2020-08-21 17:21:03,738 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 58 [2020-08-21 17:21:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:03,738 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2020-08-21 17:21:03,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:21:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2020-08-21 17:21:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 17:21:03,739 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:03,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:03,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 17:21:03,740 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1656625880, now seen corresponding path program 1 times [2020-08-21 17:21:03,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:03,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633650783] [2020-08-21 17:21:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 17:21:03,764 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 17:21:03,764 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 17:21:03,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 17:21:03,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:21:03 BoogieIcfgContainer [2020-08-21 17:21:03,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:21:03,811 INFO L168 Benchmark]: Toolchain (without parser) took 28155.80 ms. Allocated memory was 141.6 MB in the beginning and 513.3 MB in the end (delta: 371.7 MB). Free memory was 103.6 MB in the beginning and 436.8 MB in the end (delta: -333.2 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:03,812 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 17:21:03,813 INFO L168 Benchmark]: CACSL2BoogieTranslator took 566.17 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.4 MB in the beginning and 178.8 MB in the end (delta: -75.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:03,813 INFO L168 Benchmark]: Boogie Preprocessor took 71.06 ms. Allocated memory is still 205.5 MB. Free memory was 178.2 MB in the beginning and 175.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:03,814 INFO L168 Benchmark]: RCFGBuilder took 943.17 ms. Allocated memory is still 205.5 MB. Free memory was 175.2 MB in the beginning and 104.3 MB in the end (delta: 71.0 MB). Peak memory consumption was 71.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:03,815 INFO L168 Benchmark]: TraceAbstraction took 26569.85 ms. Allocated memory was 205.5 MB in the beginning and 513.3 MB in the end (delta: 307.8 MB). Free memory was 103.6 MB in the beginning and 436.8 MB in the end (delta: -333.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 17:21:03,819 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 566.17 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.4 MB in the beginning and 178.8 MB in the end (delta: -75.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.06 ms. Allocated memory is still 205.5 MB. Free memory was 178.2 MB in the beginning and 175.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 943.17 ms. Allocated memory is still 205.5 MB. Free memory was 175.2 MB in the beginning and 104.3 MB in the end (delta: 71.0 MB). Peak memory consumption was 71.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26569.85 ms. Allocated memory was 205.5 MB in the beginning and 513.3 MB in the end (delta: 307.8 MB). Free memory was 103.6 MB in the beginning and 436.8 MB in the end (delta: -333.2 MB). There was no memory consumed. 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: 26.4s, OverallIterations: 21, TraceHistogramMax: 1, AutomataDifference: 20.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4635 SDtfs, 6118 SDslu, 7838 SDs, 0 SdLazy, 16051 SolverSat, 1267 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 400 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=344occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 20 MinimizatonAttempts, 275 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.2s 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...