/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:20:17,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:20:17,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:20:17,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:20:17,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:20:17,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:20:17,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:20:17,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:20:17,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:20:17,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:20:17,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:20:17,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:20:17,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:20:17,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:20:17,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:20:17,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:20:17,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:20:17,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:20:17,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:20:17,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:20:17,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:20:17,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:20:17,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:20:17,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:20:17,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:20:17,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:20:17,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:20:17,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:20:17,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:20:17,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:20:17,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:20:17,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:20:17,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:20:17,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:20:17,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:20:17,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:20:17,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:20:17,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:20:17,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:20:17,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:20:17,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:20:17,218 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 [2020-09-21 10:20:17,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:20:17,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:20:17,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:20:17,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:20:17,248 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:20:17,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:20:17,249 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:20:17,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:20:17,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:20:17,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:20:17,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:20:17,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:20:17,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:20:17,250 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:20:17,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:20:17,251 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:20:17,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:20:17,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:20:17,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:20:17,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:20:17,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:20:17,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:20:17,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:20:17,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:20:17,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:20:17,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:20:17,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:20:17,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:20:17,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:20:17,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:20:17,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:20:17,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:20:17,791 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:20:17,792 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:20:17,793 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:20:17,794 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-09-21 10:20:17,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/219cd9176/c62a1fe77931457bb38f076e757e73e1/FLAG8c669ffce [2020-09-21 10:20:18,472 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:20:18,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-09-21 10:20:18,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/219cd9176/c62a1fe77931457bb38f076e757e73e1/FLAG8c669ffce [2020-09-21 10:20:18,778 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/219cd9176/c62a1fe77931457bb38f076e757e73e1 [2020-09-21 10:20:18,791 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:20:18,796 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:20:18,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:18,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:20:18,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:20:18,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:18" (1/1) ... [2020-09-21 10:20:18,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67fe5b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:18, skipping insertion in model container [2020-09-21 10:20:18,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:18" (1/1) ... [2020-09-21 10:20:18,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:20:18,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:20:19,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:19,239 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:20:19,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:19,437 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:20:19,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:19 WrapperNode [2020-09-21 10:20:19,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:19,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:20:19,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:20:19,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:20:19,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:19" (1/1) ... [2020-09-21 10:20:19,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:19" (1/1) ... [2020-09-21 10:20:19,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:19" (1/1) ... [2020-09-21 10:20:19,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:19" (1/1) ... [2020-09-21 10:20:19,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:19" (1/1) ... [2020-09-21 10:20:19,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:19" (1/1) ... [2020-09-21 10:20:19,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:19" (1/1) ... [2020-09-21 10:20:19,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:20:19,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:20:19,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:20:19,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:20:19,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:19" (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 [2020-09-21 10:20:19,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:20:19,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:20:19,611 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2020-09-21 10:20:19,611 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2020-09-21 10:20:19,611 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_PnP [2020-09-21 10:20:19,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:20:19,612 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2020-09-21 10:20:19,613 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2020-09-21 10:20:19,613 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2020-09-21 10:20:19,613 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2020-09-21 10:20:19,614 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2020-09-21 10:20:19,614 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2020-09-21 10:20:19,615 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2020-09-21 10:20:19,615 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2020-09-21 10:20:19,615 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Power [2020-09-21 10:20:19,616 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2020-09-21 10:20:19,616 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_InternIoCtl [2020-09-21 10:20:19,616 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2020-09-21 10:20:19,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:20:19,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 10:20:19,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:20:19,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-21 10:20:19,617 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_PnP [2020-09-21 10:20:19,618 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2020-09-21 10:20:19,618 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2020-09-21 10:20:19,619 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2020-09-21 10:20:19,619 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2020-09-21 10:20:19,619 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2020-09-21 10:20:19,619 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2020-09-21 10:20:19,619 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Power [2020-09-21 10:20:19,619 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2020-09-21 10:20:19,619 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_InternIoCtl [2020-09-21 10:20:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2020-09-21 10:20:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2020-09-21 10:20:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2020-09-21 10:20:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2020-09-21 10:20:19,621 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:20:19,621 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2020-09-21 10:20:19,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:20:19,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:20:19,956 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-21 10:20:20,020 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2020-09-21 10:20:20,020 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2020-09-21 10:20:20,043 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-21 10:20:20,180 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2020-09-21 10:20:20,180 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2020-09-21 10:20:20,182 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-21 10:20:20,228 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-09-21 10:20:20,228 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-09-21 10:20:20,236 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-21 10:20:20,282 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-09-21 10:20:20,282 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-09-21 10:20:20,371 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-21 10:20:20,390 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2020-09-21 10:20:20,390 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2020-09-21 10:20:20,418 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-21 10:20:20,515 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume false; [2020-09-21 10:20:20,515 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume !false; [2020-09-21 10:20:20,537 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:20:20,537 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:20:20,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:20 BoogieIcfgContainer [2020-09-21 10:20:20,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:20:20,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:20:20,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:20:20,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:20:20,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:20:18" (1/3) ... [2020-09-21 10:20:20,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753af172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:20, skipping insertion in model container [2020-09-21 10:20:20,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:19" (2/3) ... [2020-09-21 10:20:20,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753af172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:20, skipping insertion in model container [2020-09-21 10:20:20,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:20" (3/3) ... [2020-09-21 10:20:20,556 INFO L109 eAbstractionObserver]: Analyzing ICFG kbfiltr_simpl2.cil-2.c [2020-09-21 10:20:20,569 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:20:20,580 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:20:20,605 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:20:20,642 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:20:20,642 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:20:20,642 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:20:20,642 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:20:20,643 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:20:20,643 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:20:20,643 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:20:20,643 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:20:20,674 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states. [2020-09-21 10:20:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:20:20,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:20,685 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] [2020-09-21 10:20:20,686 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:20,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1129426977, now seen corresponding path program 1 times [2020-09-21 10:20:20,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:20,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269239248] [2020-09-21 10:20:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:21,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:21,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:21,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269239248] [2020-09-21 10:20:21,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:21,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:20:21,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895897179] [2020-09-21 10:20:21,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:20:21,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:21,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:20:21,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:20:21,237 INFO L87 Difference]: Start difference. First operand 240 states. Second operand 5 states. [2020-09-21 10:20:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:22,364 INFO L93 Difference]: Finished difference Result 418 states and 629 transitions. [2020-09-21 10:20:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:20:22,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-21 10:20:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:22,386 INFO L225 Difference]: With dead ends: 418 [2020-09-21 10:20:22,386 INFO L226 Difference]: Without dead ends: 259 [2020-09-21 10:20:22,395 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 [2020-09-21 10:20:22,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-21 10:20:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2020-09-21 10:20:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-09-21 10:20:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 326 transitions. [2020-09-21 10:20:22,485 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 326 transitions. Word has length 20 [2020-09-21 10:20:22,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:22,485 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 326 transitions. [2020-09-21 10:20:22,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:20:22,486 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 326 transitions. [2020-09-21 10:20:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:20:22,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:22,488 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] [2020-09-21 10:20:22,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:20:22,488 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1811427322, now seen corresponding path program 1 times [2020-09-21 10:20:22,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:22,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958908142] [2020-09-21 10:20:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:22,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958908142] [2020-09-21 10:20:22,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:22,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:20:22,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883054341] [2020-09-21 10:20:22,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:20:22,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:22,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:20:22,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:20:22,793 INFO L87 Difference]: Start difference. First operand 231 states and 326 transitions. Second operand 6 states. [2020-09-21 10:20:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:24,078 INFO L93 Difference]: Finished difference Result 410 states and 565 transitions. [2020-09-21 10:20:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:20:24,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-09-21 10:20:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:24,083 INFO L225 Difference]: With dead ends: 410 [2020-09-21 10:20:24,083 INFO L226 Difference]: Without dead ends: 349 [2020-09-21 10:20:24,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:20:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-21 10:20:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 304. [2020-09-21 10:20:24,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-09-21 10:20:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 415 transitions. [2020-09-21 10:20:24,154 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 415 transitions. Word has length 28 [2020-09-21 10:20:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:24,155 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 415 transitions. [2020-09-21 10:20:24,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:20:24,155 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 415 transitions. [2020-09-21 10:20:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:20:24,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:24,159 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] [2020-09-21 10:20:24,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:20:24,159 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:24,160 INFO L82 PathProgramCache]: Analyzing trace with hash 439620198, now seen corresponding path program 1 times [2020-09-21 10:20:24,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:24,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971322209] [2020-09-21 10:20:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:24,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:24,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:24,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:24,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971322209] [2020-09-21 10:20:24,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:24,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:20:24,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606109056] [2020-09-21 10:20:24,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:20:24,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:24,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:20:24,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:20:24,414 INFO L87 Difference]: Start difference. First operand 304 states and 415 transitions. Second operand 6 states. [2020-09-21 10:20:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:25,384 INFO L93 Difference]: Finished difference Result 487 states and 647 transitions. [2020-09-21 10:20:25,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:20:25,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-09-21 10:20:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:25,392 INFO L225 Difference]: With dead ends: 487 [2020-09-21 10:20:25,393 INFO L226 Difference]: Without dead ends: 368 [2020-09-21 10:20:25,394 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 [2020-09-21 10:20:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-09-21 10:20:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2020-09-21 10:20:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-09-21 10:20:25,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 466 transitions. [2020-09-21 10:20:25,459 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 466 transitions. Word has length 28 [2020-09-21 10:20:25,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:25,459 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 466 transitions. [2020-09-21 10:20:25,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:20:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 466 transitions. [2020-09-21 10:20:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 10:20:25,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:25,470 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] [2020-09-21 10:20:25,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:20:25,471 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:25,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:25,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1607848921, now seen corresponding path program 1 times [2020-09-21 10:20:25,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:25,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109569126] [2020-09-21 10:20:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:25,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:25,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:25,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:25,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109569126] [2020-09-21 10:20:25,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:25,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:20:25,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617619228] [2020-09-21 10:20:25,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:20:25,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:25,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:20:25,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:20:25,739 INFO L87 Difference]: Start difference. First operand 344 states and 466 transitions. Second operand 6 states. [2020-09-21 10:20:26,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:26,578 INFO L93 Difference]: Finished difference Result 347 states and 468 transitions. [2020-09-21 10:20:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:20:26,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-09-21 10:20:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:26,582 INFO L225 Difference]: With dead ends: 347 [2020-09-21 10:20:26,583 INFO L226 Difference]: Without dead ends: 343 [2020-09-21 10:20:26,584 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 [2020-09-21 10:20:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-09-21 10:20:26,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2020-09-21 10:20:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-09-21 10:20:26,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 463 transitions. [2020-09-21 10:20:26,612 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 463 transitions. Word has length 38 [2020-09-21 10:20:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:26,613 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 463 transitions. [2020-09-21 10:20:26,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:20:26,613 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 463 transitions. [2020-09-21 10:20:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 10:20:26,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:26,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:26,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:20:26,616 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:26,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1742109340, now seen corresponding path program 1 times [2020-09-21 10:20:26,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:26,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871456695] [2020-09-21 10:20:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 10:20:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:26,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871456695] [2020-09-21 10:20:26,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:26,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:20:26,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892593098] [2020-09-21 10:20:26,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:20:26,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:26,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:20:26,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:20:26,823 INFO L87 Difference]: Start difference. First operand 343 states and 463 transitions. Second operand 8 states. [2020-09-21 10:20:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:27,987 INFO L93 Difference]: Finished difference Result 394 states and 520 transitions. [2020-09-21 10:20:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:20:27,988 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-09-21 10:20:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:27,991 INFO L225 Difference]: With dead ends: 394 [2020-09-21 10:20:27,991 INFO L226 Difference]: Without dead ends: 325 [2020-09-21 10:20:27,993 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 [2020-09-21 10:20:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-09-21 10:20:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2020-09-21 10:20:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-09-21 10:20:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 406 transitions. [2020-09-21 10:20:28,026 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 406 transitions. Word has length 46 [2020-09-21 10:20:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:28,028 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 406 transitions. [2020-09-21 10:20:28,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:20:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 406 transitions. [2020-09-21 10:20:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 10:20:28,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:28,030 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] [2020-09-21 10:20:28,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:20:28,030 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:28,031 INFO L82 PathProgramCache]: Analyzing trace with hash 750041855, now seen corresponding path program 1 times [2020-09-21 10:20:28,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:28,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821044165] [2020-09-21 10:20:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:20:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-21 10:20:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:28,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821044165] [2020-09-21 10:20:28,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:28,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:20:28,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032012157] [2020-09-21 10:20:28,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:20:28,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:28,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:20:28,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:20:28,279 INFO L87 Difference]: Start difference. First operand 304 states and 406 transitions. Second operand 8 states. [2020-09-21 10:20:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:28,798 INFO L93 Difference]: Finished difference Result 316 states and 421 transitions. [2020-09-21 10:20:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:20:28,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-09-21 10:20:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:28,801 INFO L225 Difference]: With dead ends: 316 [2020-09-21 10:20:28,801 INFO L226 Difference]: Without dead ends: 300 [2020-09-21 10:20:28,803 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 [2020-09-21 10:20:28,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-09-21 10:20:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-09-21 10:20:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-09-21 10:20:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2020-09-21 10:20:28,834 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 364 transitions. Word has length 45 [2020-09-21 10:20:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:28,835 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 364 transitions. [2020-09-21 10:20:28,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:20:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 364 transitions. [2020-09-21 10:20:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 10:20:28,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:28,837 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] [2020-09-21 10:20:28,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:20:28,837 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:28,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1784783245, now seen corresponding path program 1 times [2020-09-21 10:20:28,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:28,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667908199] [2020-09-21 10:20:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:29,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:29,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:29,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:20:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:29,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-21 10:20:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:29,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667908199] [2020-09-21 10:20:29,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:29,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:20:29,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103689276] [2020-09-21 10:20:29,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:20:29,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:29,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:20:29,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:20:29,111 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 8 states. [2020-09-21 10:20:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:30,205 INFO L93 Difference]: Finished difference Result 290 states and 385 transitions. [2020-09-21 10:20:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:20:30,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-09-21 10:20:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:30,207 INFO L225 Difference]: With dead ends: 290 [2020-09-21 10:20:30,208 INFO L226 Difference]: Without dead ends: 242 [2020-09-21 10:20:30,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:20:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-09-21 10:20:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-09-21 10:20:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-09-21 10:20:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 321 transitions. [2020-09-21 10:20:30,234 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 321 transitions. Word has length 46 [2020-09-21 10:20:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:30,235 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 321 transitions. [2020-09-21 10:20:30,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:20:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 321 transitions. [2020-09-21 10:20:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 10:20:30,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:30,241 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] [2020-09-21 10:20:30,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:20:30,242 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:30,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:30,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1852297644, now seen corresponding path program 1 times [2020-09-21 10:20:30,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:30,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894237773] [2020-09-21 10:20:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:30,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:30,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:30,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:30,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 10:20:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:30,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:20:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:30,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:20:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:30,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894237773] [2020-09-21 10:20:30,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:30,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:20:30,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465811590] [2020-09-21 10:20:30,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:20:30,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:30,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:20:30,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:20:30,460 INFO L87 Difference]: Start difference. First operand 242 states and 321 transitions. Second operand 8 states. [2020-09-21 10:20:31,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:31,149 INFO L93 Difference]: Finished difference Result 270 states and 354 transitions. [2020-09-21 10:20:31,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:20:31,150 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-09-21 10:20:31,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:31,154 INFO L225 Difference]: With dead ends: 270 [2020-09-21 10:20:31,155 INFO L226 Difference]: Without dead ends: 240 [2020-09-21 10:20:31,155 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 [2020-09-21 10:20:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-21 10:20:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-09-21 10:20:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-09-21 10:20:31,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 317 transitions. [2020-09-21 10:20:31,174 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 317 transitions. Word has length 53 [2020-09-21 10:20:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:31,174 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 317 transitions. [2020-09-21 10:20:31,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:20:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 317 transitions. [2020-09-21 10:20:31,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 10:20:31,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:31,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:31,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:20:31,176 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1745163498, now seen corresponding path program 1 times [2020-09-21 10:20:31,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:31,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144657038] [2020-09-21 10:20:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:20:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:31,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144657038] [2020-09-21 10:20:31,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:31,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:20:31,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103486385] [2020-09-21 10:20:31,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:20:31,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:31,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:20:31,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:20:31,460 INFO L87 Difference]: Start difference. First operand 240 states and 317 transitions. Second operand 9 states. [2020-09-21 10:20:32,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:32,992 INFO L93 Difference]: Finished difference Result 313 states and 400 transitions. [2020-09-21 10:20:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:20:32,993 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-09-21 10:20:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:32,996 INFO L225 Difference]: With dead ends: 313 [2020-09-21 10:20:32,996 INFO L226 Difference]: Without dead ends: 307 [2020-09-21 10:20:32,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:20:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-09-21 10:20:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 274. [2020-09-21 10:20:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-09-21 10:20:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 356 transitions. [2020-09-21 10:20:33,042 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 356 transitions. Word has length 51 [2020-09-21 10:20:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:33,042 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 356 transitions. [2020-09-21 10:20:33,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:20:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 356 transitions. [2020-09-21 10:20:33,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-21 10:20:33,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:33,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:33,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:20:33,055 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:33,056 INFO L82 PathProgramCache]: Analyzing trace with hash -855964733, now seen corresponding path program 1 times [2020-09-21 10:20:33,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:33,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736395673] [2020-09-21 10:20:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:20:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:33,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736395673] [2020-09-21 10:20:33,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:33,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-21 10:20:33,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964599554] [2020-09-21 10:20:33,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:20:33,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:33,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:20:33,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:20:33,351 INFO L87 Difference]: Start difference. First operand 274 states and 356 transitions. Second operand 13 states. [2020-09-21 10:20:33,651 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-09-21 10:20:34,001 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-09-21 10:20:35,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:35,875 INFO L93 Difference]: Finished difference Result 325 states and 410 transitions. [2020-09-21 10:20:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 10:20:35,876 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-09-21 10:20:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:35,879 INFO L225 Difference]: With dead ends: 325 [2020-09-21 10:20:35,879 INFO L226 Difference]: Without dead ends: 284 [2020-09-21 10:20:35,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-09-21 10:20:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-21 10:20:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2020-09-21 10:20:35,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-09-21 10:20:35,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 315 transitions. [2020-09-21 10:20:35,921 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 315 transitions. Word has length 52 [2020-09-21 10:20:35,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:35,921 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 315 transitions. [2020-09-21 10:20:35,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:20:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 315 transitions. [2020-09-21 10:20:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 10:20:35,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:35,923 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] [2020-09-21 10:20:35,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:20:35,924 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:35,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:35,924 INFO L82 PathProgramCache]: Analyzing trace with hash 240184037, now seen corresponding path program 1 times [2020-09-21 10:20:35,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:35,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477954365] [2020-09-21 10:20:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:20:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477954365] [2020-09-21 10:20:36,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-21 10:20:36,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463714344] [2020-09-21 10:20:36,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:20:36,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:20:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:20:36,217 INFO L87 Difference]: Start difference. First operand 240 states and 315 transitions. Second operand 12 states. [2020-09-21 10:20:37,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,643 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2020-09-21 10:20:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:20:37,643 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-21 10:20:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,646 INFO L225 Difference]: With dead ends: 252 [2020-09-21 10:20:37,646 INFO L226 Difference]: Without dead ends: 211 [2020-09-21 10:20:37,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:20:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-21 10:20:37,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-09-21 10:20:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-09-21 10:20:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-09-21 10:20:37,666 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 53 [2020-09-21 10:20:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,666 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-09-21 10:20:37,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:20:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-09-21 10:20:37,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-21 10:20:37,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,668 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] [2020-09-21 10:20:37,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:20:37,668 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1569125, now seen corresponding path program 1 times [2020-09-21 10:20:37,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770123443] [2020-09-21 10:20:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 10:20:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770123443] [2020-09-21 10:20:37,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-21 10:20:37,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19713897] [2020-09-21 10:20:37,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:20:37,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:20:37,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:20:37,966 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 14 states. [2020-09-21 10:20:39,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:39,378 INFO L93 Difference]: Finished difference Result 227 states and 292 transitions. [2020-09-21 10:20:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:20:39,378 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-09-21 10:20:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:39,380 INFO L225 Difference]: With dead ends: 227 [2020-09-21 10:20:39,380 INFO L226 Difference]: Without dead ends: 206 [2020-09-21 10:20:39,381 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 [2020-09-21 10:20:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-21 10:20:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-09-21 10:20:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-21 10:20:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2020-09-21 10:20:39,400 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 54 [2020-09-21 10:20:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:39,400 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2020-09-21 10:20:39,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:20:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2020-09-21 10:20:39,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 10:20:39,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:39,402 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] [2020-09-21 10:20:39,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:20:39,402 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:39,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:39,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1204113239, now seen corresponding path program 1 times [2020-09-21 10:20:39,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:39,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907289570] [2020-09-21 10:20:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 10:20:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:20:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:39,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907289570] [2020-09-21 10:20:39,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:39,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 10:20:39,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062577929] [2020-09-21 10:20:39,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:20:39,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:39,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:20:39,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:20:39,664 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand 11 states. [2020-09-21 10:20:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:40,577 INFO L93 Difference]: Finished difference Result 296 states and 379 transitions. [2020-09-21 10:20:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:20:40,578 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-09-21 10:20:40,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:40,580 INFO L225 Difference]: With dead ends: 296 [2020-09-21 10:20:40,580 INFO L226 Difference]: Without dead ends: 224 [2020-09-21 10:20:40,581 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 [2020-09-21 10:20:40,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-21 10:20:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 214. [2020-09-21 10:20:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-21 10:20:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 278 transitions. [2020-09-21 10:20:40,598 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 278 transitions. Word has length 57 [2020-09-21 10:20:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:40,598 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 278 transitions. [2020-09-21 10:20:40,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:20:40,599 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 278 transitions. [2020-09-21 10:20:40,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 10:20:40,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:40,600 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] [2020-09-21 10:20:40,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:20:40,601 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:40,601 INFO L82 PathProgramCache]: Analyzing trace with hash -527681510, now seen corresponding path program 1 times [2020-09-21 10:20:40,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:40,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292469052] [2020-09-21 10:20:40,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 10:20:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:20:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:40,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292469052] [2020-09-21 10:20:40,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:40,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 10:20:40,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614694557] [2020-09-21 10:20:40,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:20:40,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:40,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:20:40,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:20:40,848 INFO L87 Difference]: Start difference. First operand 214 states and 278 transitions. Second operand 11 states. [2020-09-21 10:20:41,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,903 INFO L93 Difference]: Finished difference Result 232 states and 299 transitions. [2020-09-21 10:20:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:20:41,904 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-09-21 10:20:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,906 INFO L225 Difference]: With dead ends: 232 [2020-09-21 10:20:41,906 INFO L226 Difference]: Without dead ends: 225 [2020-09-21 10:20:41,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:20:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-21 10:20:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 215. [2020-09-21 10:20:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-21 10:20:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 279 transitions. [2020-09-21 10:20:41,925 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 279 transitions. Word has length 57 [2020-09-21 10:20:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,925 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 279 transitions. [2020-09-21 10:20:41,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:20:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 279 transitions. [2020-09-21 10:20:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-21 10:20:41,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,927 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] [2020-09-21 10:20:41,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:20:41,927 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1045578754, now seen corresponding path program 1 times [2020-09-21 10:20:41,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465169003] [2020-09-21 10:20:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:20:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-21 10:20:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:20:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465169003] [2020-09-21 10:20:42,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:20:42,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850030902] [2020-09-21 10:20:42,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:20:42,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:20:42,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:20:42,185 INFO L87 Difference]: Start difference. First operand 215 states and 279 transitions. Second operand 8 states. [2020-09-21 10:20:42,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,959 INFO L93 Difference]: Finished difference Result 258 states and 327 transitions. [2020-09-21 10:20:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:20:42,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-09-21 10:20:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,961 INFO L225 Difference]: With dead ends: 258 [2020-09-21 10:20:42,962 INFO L226 Difference]: Without dead ends: 214 [2020-09-21 10:20:42,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:20:42,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-21 10:20:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-09-21 10:20:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-21 10:20:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 274 transitions. [2020-09-21 10:20:42,980 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 274 transitions. Word has length 60 [2020-09-21 10:20:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,981 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 274 transitions. [2020-09-21 10:20:42,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:20:42,981 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 274 transitions. [2020-09-21 10:20:42,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 10:20:42,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,982 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] [2020-09-21 10:20:42,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:20:42,983 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,983 INFO L82 PathProgramCache]: Analyzing trace with hash -930292561, now seen corresponding path program 1 times [2020-09-21 10:20:42,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183153732] [2020-09-21 10:20:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:20:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:20:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:43,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183153732] [2020-09-21 10:20:43,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-21 10:20:43,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311656551] [2020-09-21 10:20:43,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:20:43,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:20:43,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:20:43,407 INFO L87 Difference]: Start difference. First operand 214 states and 274 transitions. Second operand 15 states. [2020-09-21 10:20:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:44,917 INFO L93 Difference]: Finished difference Result 226 states and 286 transitions. [2020-09-21 10:20:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:20:44,917 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-09-21 10:20:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:44,919 INFO L225 Difference]: With dead ends: 226 [2020-09-21 10:20:44,920 INFO L226 Difference]: Without dead ends: 188 [2020-09-21 10:20:44,921 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 [2020-09-21 10:20:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-09-21 10:20:44,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-09-21 10:20:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-21 10:20:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 236 transitions. [2020-09-21 10:20:44,937 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 236 transitions. Word has length 61 [2020-09-21 10:20:44,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:44,937 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 236 transitions. [2020-09-21 10:20:44,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:20:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 236 transitions. [2020-09-21 10:20:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 10:20:44,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:44,939 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] [2020-09-21 10:20:44,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:20:44,939 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:44,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:44,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1127735086, now seen corresponding path program 1 times [2020-09-21 10:20:44,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:44,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301113305] [2020-09-21 10:20:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:20:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-21 10:20:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:20:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:45,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301113305] [2020-09-21 10:20:45,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:45,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-21 10:20:45,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201009416] [2020-09-21 10:20:45,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:20:45,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:45,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:20:45,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:20:45,324 INFO L87 Difference]: Start difference. First operand 188 states and 236 transitions. Second operand 15 states. [2020-09-21 10:20:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:46,342 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2020-09-21 10:20:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:20:46,343 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-09-21 10:20:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:46,345 INFO L225 Difference]: With dead ends: 200 [2020-09-21 10:20:46,345 INFO L226 Difference]: Without dead ends: 186 [2020-09-21 10:20:46,346 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 [2020-09-21 10:20:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-21 10:20:46,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-09-21 10:20:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-21 10:20:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 232 transitions. [2020-09-21 10:20:46,370 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 232 transitions. Word has length 56 [2020-09-21 10:20:46,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:46,371 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 232 transitions. [2020-09-21 10:20:46,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:20:46,371 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 232 transitions. [2020-09-21 10:20:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 10:20:46,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:46,373 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] [2020-09-21 10:20:46,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:20:46,373 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:46,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1554463583, now seen corresponding path program 1 times [2020-09-21 10:20:46,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:46,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68776983] [2020-09-21 10:20:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 10:20:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:20:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:46,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68776983] [2020-09-21 10:20:46,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:46,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-21 10:20:46,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712440989] [2020-09-21 10:20:46,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:20:46,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:46,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:20:46,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:20:46,739 INFO L87 Difference]: Start difference. First operand 186 states and 232 transitions. Second operand 13 states. [2020-09-21 10:20:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:48,281 INFO L93 Difference]: Finished difference Result 237 states and 286 transitions. [2020-09-21 10:20:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:20:48,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-09-21 10:20:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:48,283 INFO L225 Difference]: With dead ends: 237 [2020-09-21 10:20:48,283 INFO L226 Difference]: Without dead ends: 220 [2020-09-21 10:20:48,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:20:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-21 10:20:48,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2020-09-21 10:20:48,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-21 10:20:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 237 transitions. [2020-09-21 10:20:48,306 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 237 transitions. Word has length 55 [2020-09-21 10:20:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:48,306 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 237 transitions. [2020-09-21 10:20:48,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:20:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 237 transitions. [2020-09-21 10:20:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 10:20:48,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:48,308 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] [2020-09-21 10:20:48,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 10:20:48,308 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:48,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:48,309 INFO L82 PathProgramCache]: Analyzing trace with hash -725184292, now seen corresponding path program 1 times [2020-09-21 10:20:48,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:48,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092035812] [2020-09-21 10:20:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:48,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:48,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:48,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:48,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 10:20:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:48,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:20:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:48,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092035812] [2020-09-21 10:20:48,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:48,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-21 10:20:48,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404417825] [2020-09-21 10:20:48,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:20:48,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:48,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:20:48,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:20:48,601 INFO L87 Difference]: Start difference. First operand 190 states and 237 transitions. Second operand 14 states. [2020-09-21 10:20:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:49,581 INFO L93 Difference]: Finished difference Result 206 states and 253 transitions. [2020-09-21 10:20:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:20:49,581 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-09-21 10:20:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:49,582 INFO L225 Difference]: With dead ends: 206 [2020-09-21 10:20:49,583 INFO L226 Difference]: Without dead ends: 168 [2020-09-21 10:20:49,583 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 [2020-09-21 10:20:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-21 10:20:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-09-21 10:20:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-21 10:20:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2020-09-21 10:20:49,599 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 55 [2020-09-21 10:20:49,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:49,600 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2020-09-21 10:20:49,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:20:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2020-09-21 10:20:49,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 10:20:49,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:49,601 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] [2020-09-21 10:20:49,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 10:20:49,602 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:49,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:49,602 INFO L82 PathProgramCache]: Analyzing trace with hash -639520605, now seen corresponding path program 1 times [2020-09-21 10:20:49,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:49,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829070794] [2020-09-21 10:20:49,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:49,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:49,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:20:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:49,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:20:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:49,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 10:20:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:49,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:49,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:20:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:49,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829070794] [2020-09-21 10:20:49,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:49,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-21 10:20:49,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704066528] [2020-09-21 10:20:49,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:20:49,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:49,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:20:49,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:20:49,905 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand 10 states. [2020-09-21 10:20:50,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:50,337 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2020-09-21 10:20:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:20:50,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-09-21 10:20:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:50,339 INFO L225 Difference]: With dead ends: 204 [2020-09-21 10:20:50,339 INFO L226 Difference]: Without dead ends: 162 [2020-09-21 10:20:50,340 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 [2020-09-21 10:20:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-21 10:20:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-09-21 10:20:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-21 10:20:50,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2020-09-21 10:20:50,358 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 58 [2020-09-21 10:20:50,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:50,358 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2020-09-21 10:20:50,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:20:50,358 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2020-09-21 10:20:50,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 10:20:50,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:50,361 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] [2020-09-21 10:20:50,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 10:20:50,361 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1656625880, now seen corresponding path program 1 times [2020-09-21 10:20:50,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:50,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508002159] [2020-09-21 10:20:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:20:50,421 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:20:50,421 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:20:50,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 10:20:50,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:20:50 BoogieIcfgContainer [2020-09-21 10:20:50,482 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:20:50,489 INFO L168 Benchmark]: Toolchain (without parser) took 31691.19 ms. Allocated memory was 140.5 MB in the beginning and 522.7 MB in the end (delta: 382.2 MB). Free memory was 103.0 MB in the beginning and 234.2 MB in the end (delta: -131.2 MB). Peak memory consumption was 251.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:50,490 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:20:50,497 INFO L168 Benchmark]: CACSL2BoogieTranslator took 641.23 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 102.4 MB in the beginning and 176.8 MB in the end (delta: -74.4 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:50,498 INFO L168 Benchmark]: Boogie Preprocessor took 76.85 ms. Allocated memory is still 203.9 MB. Free memory was 176.8 MB in the beginning and 173.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:50,498 INFO L168 Benchmark]: RCFGBuilder took 1026.29 ms. Allocated memory is still 203.9 MB. Free memory was 173.4 MB in the beginning and 102.0 MB in the end (delta: 71.4 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:50,499 INFO L168 Benchmark]: TraceAbstraction took 29935.62 ms. Allocated memory was 203.9 MB in the beginning and 522.7 MB in the end (delta: 318.8 MB). Free memory was 102.0 MB in the beginning and 234.2 MB in the end (delta: -132.2 MB). Peak memory consumption was 186.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:50,504 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 641.23 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 102.4 MB in the beginning and 176.8 MB in the end (delta: -74.4 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.85 ms. Allocated memory is still 203.9 MB. Free memory was 176.8 MB in the beginning and 173.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1026.29 ms. Allocated memory is still 203.9 MB. Free memory was 173.4 MB in the beginning and 102.0 MB in the end (delta: 71.4 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29935.62 ms. Allocated memory was 203.9 MB in the beginning and 522.7 MB in the end (delta: 318.8 MB). Free memory was 102.0 MB in the beginning and 234.2 MB in the end (delta: -132.2 MB). Peak memory consumption was 186.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1011]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int KernelMode ; [L22] int Executive ; [L23] int DevicePowerState ; [L24] int s ; [L25] int UNLOADED ; [L26] int NP ; [L27] int DC ; [L28] int SKIP1 ; [L29] int SKIP2 ; [L30] int MPR1 ; [L31] int MPR3 ; [L32] int IPC ; [L33] int pended ; [L34] int compFptr ; [L35] int compRegistered ; [L36] int lowerDriverReturn ; [L37] int setEventCalled ; [L38] int customIrp ; [L39] int myStatus ; [L292] int status ; [L293] int irp = __VERIFIER_nondet_int() ; [L294] int pirp ; [L295] int pirp__IoStatus__Status ; [L296] int irp_choice = __VERIFIER_nondet_int() ; [L297] int devobj = __VERIFIER_nondet_int() ; [L298] int __cil_tmp8 ; [L300] KernelMode = 0 [L301] Executive = 0 [L302] DevicePowerState = 1 [L303] s = 0 [L304] UNLOADED = 0 [L305] NP = 0 [L306] DC = 0 [L307] SKIP1 = 0 [L308] SKIP2 = 0 [L309] MPR1 = 0 [L310] MPR3 = 0 [L311] IPC = 0 [L312] pended = 0 [L313] compFptr = 0 [L314] compRegistered = 0 [L315] lowerDriverReturn = 0 [L316] setEventCalled = 0 [L317] customIrp = 0 [L318] myStatus = 0 [L322] status = 0 [L323] pirp = irp [L324] CALL _BLAST_init() [L59] UNLOADED = 0 [L60] NP = 1 [L61] DC = 2 [L62] SKIP1 = 3 [L63] SKIP2 = 4 [L64] MPR1 = 5 [L65] MPR3 = 6 [L66] IPC = 7 [L67] s = UNLOADED [L68] pended = 0 [L69] compFptr = 0 [L70] compRegistered = 0 [L71] lowerDriverReturn = 0 [L72] setEventCalled = 0 [L73] customIrp = 0 [L324] RET _BLAST_init() [L326] COND TRUE status >= 0 [L327] s = NP [L328] customIrp = 0 [L329] setEventCalled = customIrp [L330] lowerDriverReturn = setEventCalled [L331] compRegistered = lowerDriverReturn [L332] pended = compRegistered [L333] pirp__IoStatus__Status = 0 [L334] myStatus = 0 [L335] COND FALSE !(irp_choice == 0) [L340] CALL stub_driver_init() [L45] s = NP [L46] pended = 0 [L47] compFptr = 0 [L48] compRegistered = 0 [L49] lowerDriverReturn = 0 [L50] setEventCalled = 0 [L51] customIrp = 0 [L340] RET stub_driver_init() [L343] COND FALSE !(status < 0) [L347] int tmp_ndt_1; [L348] tmp_ndt_1 = __VERIFIER_nondet_int() [L349] COND FALSE !(tmp_ndt_1 == 0) [L352] int tmp_ndt_2; [L353] tmp_ndt_2 = __VERIFIER_nondet_int() [L354] COND FALSE !(tmp_ndt_2 == 1) [L357] int tmp_ndt_3; [L358] tmp_ndt_3 = __VERIFIER_nondet_int() [L359] COND TRUE tmp_ndt_3 == 3 [L386] CALL, EXPR KbFilter_PnP(devobj, pirp) [L78] int devExt ; [L79] int irpStack ; [L80] int status ; [L81] int event = __VERIFIER_nondet_int() ; [L82] int DeviceObject__DeviceExtension = __VERIFIER_nondet_int() ; [L83] int Irp__Tail__Overlay__CurrentStackLocation = __VERIFIER_nondet_int() ; [L84] int irpStack__MinorFunction = __VERIFIER_nondet_int() ; [L85] int devExt__TopOfStack = __VERIFIER_nondet_int() ; [L86] int devExt__Started ; [L87] int devExt__Removed ; [L88] int devExt__SurpriseRemoved ; [L89] int Irp__IoStatus__Status ; [L90] int Irp__IoStatus__Information ; [L91] int Irp__CurrentLocation = __VERIFIER_nondet_int() ; [L92] int irpSp ; [L93] int nextIrpSp ; [L94] int nextIrpSp__Control ; [L95] int irpSp___0 ; [L96] int irpSp__Context ; [L97] int irpSp__Control ; [L98] long __cil_tmp23 ; [L101] status = 0 [L102] devExt = DeviceObject__DeviceExtension [L103] irpStack = Irp__Tail__Overlay__CurrentStackLocation [L104] COND FALSE !(irpStack__MinorFunction == 0) [L107] COND FALSE !(irpStack__MinorFunction == 23) [L110] COND TRUE irpStack__MinorFunction == 2 [L234] devExt__Removed = 1 [L235] COND TRUE s == NP [L236] s = SKIP1 [L243] Irp__CurrentLocation ++ [L244] Irp__Tail__Overlay__CurrentStackLocation ++ [L245] CALL IofCallDriver(devExt__TopOfStack, Irp) [L481] int returnVal2 ; [L482] int compRetStatus ; [L483] int lcontext = __VERIFIER_nondet_int() ; [L484] long long __cil_tmp7 ; [L487] COND FALSE !(\read(compRegistered)) [L500] int tmp_ndt_6; [L501] tmp_ndt_6 = __VERIFIER_nondet_int() [L502] COND FALSE !(tmp_ndt_6 == 0) [L505] int tmp_ndt_7; [L506] tmp_ndt_7 = __VERIFIER_nondet_int() [L507] COND TRUE tmp_ndt_7 == 1 [L516] returnVal2 = -1073741823 [L526] COND FALSE !(s == NP) [L530] COND FALSE !(s == MPR1) [L539] COND TRUE s == SKIP1 [L540] s = SKIP2 [L541] lowerDriverReturn = returnVal2 [L549] return (returnVal2); [L245] RET IofCallDriver(devExt__TopOfStack, Irp) [L246] status = 0 [L288] return (status); [L386] RET, EXPR KbFilter_PnP(devobj, pirp) [L386] status = KbFilter_PnP(devobj, pirp) [L410] COND FALSE !(pended == 1) [L418] COND FALSE !(pended == 1) [L426] COND TRUE s != UNLOADED [L427] COND TRUE status != -1 [L428] COND FALSE !(s != SKIP2) [L438] COND FALSE !(pended == 1) [L445] COND FALSE !(s == DC) [L450] COND TRUE status != lowerDriverReturn [L451] CALL errorFn() [L1011] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 18 procedures, 240 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 29.7s, OverallIterations: 21, TraceHistogramMax: 1, AutomataDifference: 22.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4628 SDtfs, 6126 SDslu, 7815 SDs, 0 SdLazy, 16016 SolverSat, 1271 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 400 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=344occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 20 MinimizatonAttempts, 275 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 1029 NumberOfCodeBlocks, 1029 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 953 ConstructedInterpolants, 0 QuantifiedInterpolants, 212124 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...