/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:30:51,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:30:51,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:30:51,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:30:51,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:30:51,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:30:51,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:30:51,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:30:51,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:30:51,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:30:51,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:30:51,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:30:51,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:30:51,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:30:51,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:30:51,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:30:51,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:30:51,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:30:51,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:30:51,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:30:51,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:30:51,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:30:51,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:30:51,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:30:51,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:30:51,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:30:51,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:30:51,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:30:51,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:30:51,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:30:51,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:30:51,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:30:51,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:30:51,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:30:51,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:30:51,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:30:51,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:30:51,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:30:51,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:30:51,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:30:51,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:30:51,443 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 [2020-09-24 21:30:51,496 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:30:51,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:30:51,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:30:51,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:30:51,500 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:30:51,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:30:51,501 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:30:51,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:30:51,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:30:51,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:30:51,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:30:51,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:30:51,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:30:51,503 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:30:51,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:30:51,504 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:30:51,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:30:51,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:30:51,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:30:51,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:30:51,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:30:51,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:30:51,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:30:51,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:30:51,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:30:51,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:30:51,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:30:51,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:30:51,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:30:51,507 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:30:51,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:30:51,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:30:52,005 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:30:52,008 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:30:52,009 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:30:52,010 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-09-24 21:30:52,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12f41c99a/b9f2a122bea44dc2863371c72871e075/FLAG4b9d49e36 [2020-09-24 21:30:52,614 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:30:52,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-09-24 21:30:52,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12f41c99a/b9f2a122bea44dc2863371c72871e075/FLAG4b9d49e36 [2020-09-24 21:30:52,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12f41c99a/b9f2a122bea44dc2863371c72871e075 [2020-09-24 21:30:52,941 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:30:52,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:30:52,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:30:52,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:30:52,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:30:52,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:30:52" (1/1) ... [2020-09-24 21:30:52,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a7ae4f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:52, skipping insertion in model container [2020-09-24 21:30:52,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:30:52" (1/1) ... [2020-09-24 21:30:52,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:30:53,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:30:53,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:30:53,352 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:30:53,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:30:53,507 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:30:53,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53 WrapperNode [2020-09-24 21:30:53,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:30:53,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:30:53,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:30:53,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:30:53,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:30:53,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:30:53,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:30:53,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:30:53,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (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 [2020-09-24 21:30:53,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:30:53,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:30:53,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:30:53,660 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-09-24 21:30:53,660 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-09-24 21:30:53,660 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-09-24 21:30:53,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:30:53,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:30:53,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 21:30:53,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 21:30:53,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:30:53,661 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-09-24 21:30:53,662 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-09-24 21:30:53,662 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-09-24 21:30:53,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:30:53,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:30:53,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:30:54,290 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:30:54,290 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 21:30:54,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:30:54 BoogieIcfgContainer [2020-09-24 21:30:54,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:30:54,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:30:54,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:30:54,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:30:54,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:30:52" (1/3) ... [2020-09-24 21:30:54,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2429b7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:30:54, skipping insertion in model container [2020-09-24 21:30:54,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (2/3) ... [2020-09-24 21:30:54,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2429b7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:30:54, skipping insertion in model container [2020-09-24 21:30:54,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:30:54" (3/3) ... [2020-09-24 21:30:54,313 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-09-24 21:30:54,326 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:30:54,338 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:30:54,362 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:30:54,392 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:30:54,392 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:30:54,392 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:30:54,393 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:30:54,393 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:30:54,393 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:30:54,393 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:30:54,393 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:30:54,419 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-09-24 21:30:54,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-24 21:30:54,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:30:54,434 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:30:54,434 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:30:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:30:54,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2062280112, now seen corresponding path program 1 times [2020-09-24 21:30:54,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:30:54,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3578208] [2020-09-24 21:30:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:30:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:54,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:54,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:55,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:55,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:56,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:56,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-24 21:30:56,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:30:56,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1780 [2020-09-24 21:30:56,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:56,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:30:56,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-24 21:30:56,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 21:30:56,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:30:56,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:30:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:56,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:56,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:56,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:30:56,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:56,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:30:56,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:56,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:30:56,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:56,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:30:56,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:30:56,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:30:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:56,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:56,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:56,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:30:56,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:56,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 21:30:56,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:56,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:30:56,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:56,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:30:56,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:30:56,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:30:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:56,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:56,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:56,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:56,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:30:56,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:30:56,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-24 21:30:56,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:56,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:30:56,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:56,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:30:56,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:30:56,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 21:30:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:56,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:56,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:56,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:30:56,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:56,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:30:56,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:30:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:30:56,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:30:56,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 21:30:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:56,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:56,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:30:56,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:56,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:30:56,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:56,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:30:56,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:30:56,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:30:56,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-24 21:30:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:56,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:56,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:56,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 21:30:56,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:56,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:30:56,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:56,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:30:56,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:30:56,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:30:56,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:30:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-24 21:30:56,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3578208] [2020-09-24 21:30:56,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:30:56,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:30:56,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482607969] [2020-09-24 21:30:56,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:30:56,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:30:56,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:30:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:30:56,797 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 6 states. [2020-09-24 21:30:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:30:56,986 INFO L93 Difference]: Finished difference Result 278 states and 352 transitions. [2020-09-24 21:30:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:30:56,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2020-09-24 21:30:56,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:30:57,009 INFO L225 Difference]: With dead ends: 278 [2020-09-24 21:30:57,009 INFO L226 Difference]: Without dead ends: 156 [2020-09-24 21:30:57,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:30:57,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-24 21:30:57,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2020-09-24 21:30:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-24 21:30:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 181 transitions. [2020-09-24 21:30:57,100 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 181 transitions. Word has length 100 [2020-09-24 21:30:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:30:57,101 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 181 transitions. [2020-09-24 21:30:57,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:30:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 181 transitions. [2020-09-24 21:30:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-24 21:30:57,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:30:57,109 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:30:57,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:30:57,109 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:30:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:30:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1435857694, now seen corresponding path program 1 times [2020-09-24 21:30:57,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:30:57,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260437450] [2020-09-24 21:30:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:30:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:57,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:57,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:57,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:57,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:02,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-24 21:31:02,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:31:02,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 21:31:02,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:02,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:31:02,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 21:31:02,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:31:02,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:02,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:02,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:02,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:02,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:02,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:02,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:02,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:02,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:02,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:02,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:02,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:31:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:02,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:02,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:02,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:02,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 21:31:02,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:02,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:02,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:02,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:02,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:02,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:31:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:02,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:02,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:02,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:02,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 21:31:02,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:02,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:31:02,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:31:02,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:31:02,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:02,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 21:31:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:02,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:02,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:02,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:02,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:31:02,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:02,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:02,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:02,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:02,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:02,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 21:31:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:02,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:02,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:02,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:02,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:31:02,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:02,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:02,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:02,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:02,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:02,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 21:31:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:02,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:02,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 21:31:02,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:02,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:31:02,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:31:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:02,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 21:31:02,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260437450] [2020-09-24 21:31:02,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:02,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 21:31:02,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231370525] [2020-09-24 21:31:02,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:31:02,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:02,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:31:02,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:31:02,330 INFO L87 Difference]: Start difference. First operand 151 states and 181 transitions. Second operand 4 states. [2020-09-24 21:31:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:02,492 INFO L93 Difference]: Finished difference Result 318 states and 401 transitions. [2020-09-24 21:31:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:31:02,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2020-09-24 21:31:02,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:02,501 INFO L225 Difference]: With dead ends: 318 [2020-09-24 21:31:02,501 INFO L226 Difference]: Without dead ends: 198 [2020-09-24 21:31:02,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:31:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-09-24 21:31:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 175. [2020-09-24 21:31:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-24 21:31:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2020-09-24 21:31:02,557 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 104 [2020-09-24 21:31:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:02,558 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2020-09-24 21:31:02,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:31:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2020-09-24 21:31:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-24 21:31:02,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:02,562 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:02,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:31:02,562 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:02,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:02,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1632335847, now seen corresponding path program 1 times [2020-09-24 21:31:02,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:02,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527363467] [2020-09-24 21:31:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:02,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:06,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:06,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-24 21:31:06,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:31:06,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4277 [2020-09-24 21:31:06,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:06,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:31:06,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 21:31:06,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:31:06,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:06,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:06,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:06,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:06,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:06,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:06,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:06,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:06,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:06,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:06,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:06,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:06,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:31:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:06,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:06,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:06,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:06,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:06,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:06,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:06,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:06,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:06,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:06,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:06,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:31:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:06,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:06,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:06,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:31:06,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:06,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 21:31:06,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:06,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:31:06,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:31:06,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:31:06,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:06,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:31:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:06,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:06,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:06,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:06,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:06,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:31:06,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:06,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:06,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:06,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:06,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:06,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 21:31:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:06,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:06,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:06,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:06,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:06,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:31:06,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:06,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:06,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 21:31:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:06,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:06,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:06,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 21:31:06,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:06,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:31:06,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:06,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:06,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:31:06,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:06,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 21:31:06,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527363467] [2020-09-24 21:31:06,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:06,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 21:31:06,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749178524] [2020-09-24 21:31:06,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:31:06,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:06,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:31:06,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:31:06,968 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand 4 states. [2020-09-24 21:31:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:07,041 INFO L93 Difference]: Finished difference Result 321 states and 391 transitions. [2020-09-24 21:31:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 21:31:07,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-09-24 21:31:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:07,044 INFO L225 Difference]: With dead ends: 321 [2020-09-24 21:31:07,044 INFO L226 Difference]: Without dead ends: 188 [2020-09-24 21:31:07,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:31:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-09-24 21:31:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-09-24 21:31:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-24 21:31:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 225 transitions. [2020-09-24 21:31:07,063 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 225 transitions. Word has length 107 [2020-09-24 21:31:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:07,064 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 225 transitions. [2020-09-24 21:31:07,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:31:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 225 transitions. [2020-09-24 21:31:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-24 21:31:07,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:07,066 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:07,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:31:07,067 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:07,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:07,067 INFO L82 PathProgramCache]: Analyzing trace with hash -2092072737, now seen corresponding path program 1 times [2020-09-24 21:31:07,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:07,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449015027] [2020-09-24 21:31:07,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:07,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:07,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:07,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:07,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:12,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:12,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-09-24 21:31:12,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:31:12,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 21:31:12,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:12,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:31:12,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 21:31:12,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:31:12,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:12,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:12,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:12,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:12,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:12,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:12,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:31:12,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:12,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:12,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:12,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:12,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:12,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:31:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:12,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:12,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:12,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:12,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:12,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:12,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:12,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:12,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:12,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:12,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:12,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:31:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:12,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:12,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:12,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 21:31:12,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:12,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 21:31:12,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:12,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:31:12,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:31:12,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:31:12,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:12,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 21:31:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:12,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:12,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:12,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:12,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:12,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:31:12,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:12,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:12,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:12,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:12,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:12,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 21:31:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:12,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:12,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:12,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:12,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:12,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:31:12,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:12,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:12,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:12,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:12,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:12,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 21:31:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:12,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:12,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:12,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 21:31:12,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:12,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:31:12,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:12,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:12,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:31:12,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:12,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 21:31:12,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449015027] [2020-09-24 21:31:12,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:12,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 21:31:12,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225599829] [2020-09-24 21:31:12,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:31:12,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:12,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:31:12,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:31:12,260 INFO L87 Difference]: Start difference. First operand 186 states and 225 transitions. Second operand 5 states. [2020-09-24 21:31:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:12,374 INFO L93 Difference]: Finished difference Result 353 states and 438 transitions. [2020-09-24 21:31:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:31:12,375 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-09-24 21:31:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:12,377 INFO L225 Difference]: With dead ends: 353 [2020-09-24 21:31:12,377 INFO L226 Difference]: Without dead ends: 214 [2020-09-24 21:31:12,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:31:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-24 21:31:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 196. [2020-09-24 21:31:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-09-24 21:31:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 238 transitions. [2020-09-24 21:31:12,416 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 238 transitions. Word has length 112 [2020-09-24 21:31:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:12,416 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 238 transitions. [2020-09-24 21:31:12,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:31:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 238 transitions. [2020-09-24 21:31:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-24 21:31:12,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:12,422 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:12,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:31:12,423 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1338963695, now seen corresponding path program 1 times [2020-09-24 21:31:12,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:12,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188814887] [2020-09-24 21:31:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:12,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:12,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:12,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:12,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:17,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:17,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-09-24 21:31:17,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:31:17,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 21:31:17,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:17,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:31:17,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 21:31:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:31:17,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:17,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:17,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:17,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:17,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:17,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:17,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:17,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:17,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:17,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:17,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:17,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:17,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:31:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:17,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:17,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:17,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:17,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:17,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:17,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:17,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:17,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:17,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:17,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:17,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:31:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:17,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:17,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:17,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 21:31:17,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:17,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 21:31:17,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:17,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:31:17,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:31:17,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 21:31:17,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:17,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 21:31:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:17,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:17,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:17,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:17,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:17,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 21:31:17,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:17,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:17,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:17,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:17,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:17,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 21:31:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:17,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:17,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:17,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:17,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:17,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:31:17,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:17,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:17,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:17,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 21:31:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:17,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:17,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:17,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 21:31:17,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:17,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:31:17,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:17,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:17,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:31:17,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:17,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 21:31:17,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188814887] [2020-09-24 21:31:17,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:17,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 21:31:17,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811888302] [2020-09-24 21:31:17,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:31:17,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:17,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:31:17,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:31:17,624 INFO L87 Difference]: Start difference. First operand 196 states and 238 transitions. Second operand 5 states. [2020-09-24 21:31:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:17,813 INFO L93 Difference]: Finished difference Result 369 states and 463 transitions. [2020-09-24 21:31:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:31:17,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-09-24 21:31:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:17,818 INFO L225 Difference]: With dead ends: 369 [2020-09-24 21:31:17,818 INFO L226 Difference]: Without dead ends: 223 [2020-09-24 21:31:17,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:31:17,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-24 21:31:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 193. [2020-09-24 21:31:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-09-24 21:31:17,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 230 transitions. [2020-09-24 21:31:17,847 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 230 transitions. Word has length 112 [2020-09-24 21:31:17,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:17,848 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 230 transitions. [2020-09-24 21:31:17,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:31:17,848 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 230 transitions. [2020-09-24 21:31:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-24 21:31:17,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:17,853 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:17,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:31:17,854 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:17,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1602071833, now seen corresponding path program 2 times [2020-09-24 21:31:17,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:17,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220137598] [2020-09-24 21:31:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:17,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:17,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:18,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:18,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:22,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:22,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-09-24 21:31:22,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:31:22,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 21:31:22,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:31:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 21:31:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:31:22,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:22,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:22,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:22,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:22,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:22,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:22,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:22,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:22,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:22,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:22,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:22,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:22,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:31:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:22,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:22,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:22,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:22,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:22,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:22,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:22,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:22,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:22,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:22,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:22,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:31:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:22,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:22,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:22,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 21:31:22,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:22,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 21:31:22,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:22,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:31:22,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:31:22,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:31:22,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:23,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 21:31:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:23,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:23,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:23,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:23,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:23,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:23,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:23,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:23,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:23,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:23,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:23,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 21:31:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:23,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:23,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:23,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:23,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:23,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:31:23,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:23,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:23,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:23,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:23,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:23,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-24 21:31:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:23,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:23,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:23,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 21:31:23,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:23,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:31:23,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:23,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:23,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:31:23,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:23,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 21:31:23,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220137598] [2020-09-24 21:31:23,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:23,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:31:23,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220873836] [2020-09-24 21:31:23,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:31:23,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:23,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:31:23,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:31:23,071 INFO L87 Difference]: Start difference. First operand 193 states and 230 transitions. Second operand 6 states. [2020-09-24 21:31:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:23,219 INFO L93 Difference]: Finished difference Result 380 states and 473 transitions. [2020-09-24 21:31:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:31:23,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-09-24 21:31:23,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:23,228 INFO L225 Difference]: With dead ends: 380 [2020-09-24 21:31:23,228 INFO L226 Difference]: Without dead ends: 239 [2020-09-24 21:31:23,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:31:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-24 21:31:23,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 203. [2020-09-24 21:31:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-09-24 21:31:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 243 transitions. [2020-09-24 21:31:23,256 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 243 transitions. Word has length 117 [2020-09-24 21:31:23,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:23,258 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 243 transitions. [2020-09-24 21:31:23,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:31:23,258 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 243 transitions. [2020-09-24 21:31:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-24 21:31:23,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:23,262 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:23,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:31:23,263 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:23,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:23,264 INFO L82 PathProgramCache]: Analyzing trace with hash -848962791, now seen corresponding path program 1 times [2020-09-24 21:31:23,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:23,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787404311] [2020-09-24 21:31:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:23,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:23,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:23,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:23,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:28,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:28,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-09-24 21:31:28,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:31:28,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:31:28,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:31:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 21:31:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:31:28,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:28,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:28,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:28,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:28,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:28,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:28,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:28,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:28,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:28,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:28,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:28,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:28,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:31:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:28,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:28,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:28,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:28,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:28,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:28,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:28,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:28,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:28,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:31:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:28,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:28,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:28,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 21:31:28,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:28,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 21:31:28,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:28,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:31:28,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:31:28,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 21:31:28,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:28,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 21:31:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:28,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:28,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:28,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:28,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:28,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:28,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:28,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:28,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:28,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:28,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:28,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 21:31:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:28,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:28,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:28,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:28,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:28,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:28,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:28,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:28,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:28,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:28,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:28,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-24 21:31:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:28,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:28,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:28,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 21:31:28,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:28,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:31:28,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:28,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:31:28,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:28,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 21:31:28,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787404311] [2020-09-24 21:31:28,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:28,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:31:28,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348609758] [2020-09-24 21:31:28,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:31:28,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:28,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:31:28,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:31:28,460 INFO L87 Difference]: Start difference. First operand 203 states and 243 transitions. Second operand 6 states. [2020-09-24 21:31:28,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:28,698 INFO L93 Difference]: Finished difference Result 386 states and 481 transitions. [2020-09-24 21:31:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:31:28,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-09-24 21:31:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:28,704 INFO L225 Difference]: With dead ends: 386 [2020-09-24 21:31:28,705 INFO L226 Difference]: Without dead ends: 238 [2020-09-24 21:31:28,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:31:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-24 21:31:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 203. [2020-09-24 21:31:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-09-24 21:31:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 242 transitions. [2020-09-24 21:31:28,722 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 242 transitions. Word has length 117 [2020-09-24 21:31:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:28,723 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 242 transitions. [2020-09-24 21:31:28,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:31:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 242 transitions. [2020-09-24 21:31:28,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-24 21:31:28,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:28,725 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:28,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:31:28,725 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:28,726 INFO L82 PathProgramCache]: Analyzing trace with hash 187139551, now seen corresponding path program 3 times [2020-09-24 21:31:28,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:28,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575126920] [2020-09-24 21:31:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:28,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:28,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:29,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:29,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:33,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-09-24 21:31:33,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:31:33,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 21:31:33,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:33,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:31:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 21:31:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 21:31:33,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:33,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:33,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:33,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:33,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:33,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:33,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:33,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:33,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:33,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:33,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 21:31:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:33,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:33,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:33,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:33,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:33,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:33,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:33,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:31:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:33,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:33,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 21:31:33,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:33,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 21:31:33,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:33,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:31:33,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:31:33,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 21:31:33,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:33,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 21:31:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:33,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:33,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:33,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:33,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:31:33,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:33,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:33,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:33,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:33,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:33,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 21:31:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:33,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:33,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:33,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:33,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:31:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:33,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:33,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-24 21:31:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:33,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:33,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:33,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 21:31:33,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:33,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:31:33,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:33,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:31:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:33,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 21:31:33,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575126920] [2020-09-24 21:31:33,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:33,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:31:33,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21161448] [2020-09-24 21:31:33,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:31:33,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:33,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:31:33,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:31:33,951 INFO L87 Difference]: Start difference. First operand 203 states and 242 transitions. Second operand 7 states. [2020-09-24 21:31:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:34,172 INFO L93 Difference]: Finished difference Result 400 states and 501 transitions. [2020-09-24 21:31:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:31:34,173 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2020-09-24 21:31:34,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:34,176 INFO L225 Difference]: With dead ends: 400 [2020-09-24 21:31:34,176 INFO L226 Difference]: Without dead ends: 254 [2020-09-24 21:31:34,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:31:34,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-24 21:31:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 213. [2020-09-24 21:31:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-09-24 21:31:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 255 transitions. [2020-09-24 21:31:34,200 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 255 transitions. Word has length 122 [2020-09-24 21:31:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:34,201 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 255 transitions. [2020-09-24 21:31:34,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:31:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 255 transitions. [2020-09-24 21:31:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-24 21:31:34,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:34,205 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:34,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:31:34,206 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:34,206 INFO L82 PathProgramCache]: Analyzing trace with hash 940248593, now seen corresponding path program 2 times [2020-09-24 21:31:34,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:34,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591843642] [2020-09-24 21:31:34,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:34,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:34,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:34,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking...